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Posts Tagged ‘colaspis’

Over the weekend Sebe Brown scouted a field in Concordia parish where the stand was being severely reduced by colaspis larvae feeding on seedlings. Problems with this field started on March 16 when the stand began to decline. The plants were described as yellow and stunted. This was a Dermacor X-100 treated hybrid rice field no-till drill-planted at a 23 lbs/acre seeding rate. Surrounding fields were growing nicely. When Sebe scouted the field on Saturday he confirmed that the injury was being caused by Colaspis larvae feeding on the roots of seedlings. The stand was reduced about 40% by this injury. The recommendation was made to establish a shallow permanent flood to avoid further injury. In a situation like this, where the rice isn’t quite ready for a flood, you may lose some injured plants to the flood. The alternative is to wait to establish flood, during which time the colaspis will continue to injure the seedlings and further reduce the stand. Establishment of a flood on the field will prevent further feeding injury by the colaspis larvae and eventually the larvae will die. Note: according to experts in Arkansas it may take up to a month for colaspis larvae to die in the permanent flood. Click here to read more about colaspis. You can watch a video on how to scout for colaspis here. The Dermacor X-100 should provide about 30% suppression of the colaspis infestation. Next season, they will consider using a CruiserMaxx or NipsitInside seed treatment to target control of colaspis. The use of pyrethroids will not provide control of colaspis because they are injuring the crop below the soil line.


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I had more calls this week about sugarcane beetles, chinch bugs, colaspis and bill bugs in rice in Southwestern Louisiana. In the majority of these fields, no insecticide seed treatment had been applied to the seed. The best response is to bring a flood as soon as possible. If this isn’t possible, some crop advisors have reported substantial improvement in the stand following  a pyrethroid spray and holding a light flush for a couple of days.

If you’d like to see a video of a sugarcane beetle digging back into the soil after I removed it from the soil you can click here. Thanks to Extension Entomologist Kathy Flanders at Auburn University for posting the video on my behalf. I shot this video at a field we scouted with Barrett Courville and Benet Augustine last week.

After doing more research on the bill bugs we collected, we found that we have not one, but four species of bill bugs that were collected from a single field. We are doing more work to tease out the species complex that occurs in south Louisiana. If you find any bill bugs in rice please get them to your local county agent and ask them to deliver to me. You can simply throw then in a ziploc bag and kill in the freezer. Please write the farmer name (or some other way to note the field location) and date on the bag. If you can record gps coordinates and e-mail to me that would be a real help. 

Update on the LSU AgCenter rice water weevil demonstration test:

We planted our final field location in Avoyelles Parish on April 27, 2011. We have a stand of rice and will take data on the stand on May 23, 2011. The majority of our other demonstration locations are at or near permanent flood. We will be running around pulling core samples from all the locations in the middle of June. To learn more about rice water weevil biology and our sampling methods you can watch this video

Field meeting season will kick off soon.

Please mark the following dates on your calendar:

June 1, 2011: Rice field tour in Welsh, LA. I will post an agenda soon. I’ll be in hand to discuss rice insect management and field observations.

June 15, 2011: LSU AgCenter South Farm Tour in Crowley, LA. We will have a meeting at our rice water weevil demo test site on the Simon Farm, which will include a sponsored lunch (Special thanks to our sponsors: John Bordlee – Valent; Toby McCown – Dupont, and Josh Zaunbrecher – Syngenta). 

June 30, 2011: LSU AgCenter Rice Research Station Field Day in Crowley, LA.

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This morning I admired the moon setting over University Lakes on my way into campus. Wait a minute, I was biking into campus by moonlight? Yep, a sure sign of field season – early mornings and long (but exciting) days. Today we headed down to Jefferson-Davis Parish to scout a couple of fields that were suffering from stand loss due to an unknown cause. In one location we are still trying to determine the cause. In the second field we scouted we confirmed a fairly severe colaspis infestation. We met with Farmer Kyle Fontenot, Consultant Ron Smith and Nicky Miller at the field which is located between Hathaway and Elton.
 

Kyle Fontenot, Anna, Nicky Miller, and Ron Smith. Note that Kyle and Nicky were both on their iPhones connecting with me on the blog and facebook.

 
Within a few minutes of digging we had no trouble finding many plants with colaspis larvae feeding on the roots, causing the plants to decline and eventually die.

Stand reduction in a hybrid rice field that was caused by colaspis larvae feeding on the roots of the plants.

 

We typically found the larvae on dying plants approximately 2 inches below the soil line.
A colaspis larva.
A colaspis pupa near the tip of a knife blade to give you an idea of the size.
 

 

It is worth noting the history of this particular field. In 2010 it was used as cattle pasture. To prepare the field for rice, the farmer plowed in the fall, burned the vegetation (with fire) in December/January, then plowed again, and finally plowed, shanked, and fertilized before planting. Rice was broadcast and then packed. The planting method made it even harder to determine the cause of injury because we did not observe the typical loss of plants along a drill row that we have seen in the past with colaspis infestations.

Visit this website for more information on the biology and scouting for colaspis in rice: http://www.lsuagcenter.com/en/crops_livestock/crops/rice/Insects/LSU+AgCenter+Rice+Training+Session+How+to+Scout+for+Grape+Colaspis+in+Rice.htm

This field was planted with hybrid rice seed that was treated with Apron, Maxim, Dynasty and Dermacor X-100. Dermacor has a registration for suppression of colaspis and previous research has indicated it will provide about 40% control. It is possible the injury would have been worse without the Dermacor X-100 treatment. If CruiserMaxx or NipsitInside would have been used, then we probably would not have experienced this much stand reduction. Dermacor was selected because of the history of rice water weevil pressure at the field site. It was determined that a replant was not necessary. At this point, the only option is to bring a light pin-point flood to hopefully stop the feeding of the colaspis larvae and prevent further injury of the rice.

I suspect that the colaspis problems may be more widespread. After they left this field Ron Smith called to say that they also found colaspis in another nearby field. I’ll be back down that way next week to further investigate the situation.

 

 

 
 

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If you reach way back in your memory, some of you may remember completing the 2009 Louisiana rice insects survey at one of the winter production meetings back in January or February of this year.  The surveys were distributed in Louisiana, Texas, Missouri, Mississippi and Arkansas this year.  Anna and I have recently completed a summary of the responses and I’ll use this series of posts to provide an overview of a few observations.  Keep in mind that the trends reported in this posting relate to the 2009 production season, not the 2010 production season.  We will distribute a survey about the 2010 production season at the winter meetings in January.

Participants from the circled Louisiana parishes completed our survey.

184 survey sheets were processed from the following states: Louisiana (146), Texas (47), Missouri (5), Mississippi (2), and Arkansas (1).  In Louisiana, respondents from the following parishes completed surveys: Acadia, Avoyelles, Beauregard, Calcasieu, Caldwell, Cameron, Catahoula, Concordia, East Carroll, Evangeline, Franklin, Jefferson Davis, Lafayette, Madison, Morehouse, Ouachita, Point Coupee, Rapides, Richland, St. Landry, and Vermilion (see map above).  

We would like to thank all rice industry members who participated in this survey and helped to distribute the survey sheets. This survey was supported in part by the Louisiana Rice Research Board and the Southern Region Integrated Pest Management Program.

My comments will mostly be confined to the Louisiana responses at this time.  The demographics of the participants in Louisiana was broken down as follows: rice farmers (79%), consultants (12%), dealers (7%), and others (10%, e.g. county agents, researchers, manufacturer representatives, marketing managers and land owners).  The length of time that repondents have been involved with rice production varied from less than five to more than forty years, with the greatest percentage (18%) with 26 to 30 years of experience.  Approximately 76% of the survey respondents farmed or consulted on less than 2500 acres of rice in the 2009 production season.

The first series of questions related to insect infestations which were severe enough to warrant an insecticide treatment.  92% of Louisiana respondents reported that they had some fields that required treatment for rice water weevils.  88% of the respondents reported problems with rice stink bugs.  While fewer people reported infestations of grasshoppers (24%), armyworms (24%), and chinch bugs (23%).  The next most commonly reported insects were the rice leafminer (12%), stalkborers (11%) and colaspis (11%).  Less than 10% of repsondents reported infestations of rice seed midge, aphids, rice levee bill bug, or south American rice miner that warranted an insecticide treatment. 

We asked more detailed questions about rice water weevil management strategies.  A large portion of our time is dedicated to rice water weevil management because this insect traditionally causes the most significant damage to Louisiana rice production from season to season.

In both the 2008 and the 2009 production season survey, we asked the following question:

If rice water weevils were a problem in your rice field(s), which method did you use to control or prevent a rice water weevil infestation? Note that respondents could choose more than one answer since they are completing a survey that relates to more than one production field.  That will explain why the total response does not equal 100%.

In 2008, among 163 respondents in Louisiana, the most common method used to control or prevent rice water weevil was drained field (43%).

In 2009 among 130 respondents in Louisiana, the most common method used to control or prevent rice water weevil was Dermacor X-100 seed treatment (52%).  In 2009, this was the only seed treatment available for use in rice.

Method used to control rice water weevil in Louisiana rice fields

2008 Percentage (%) 2009 Percentage (%)
Drained field 43 34
Post-flood treatment with a foliar spray of pyrethroid 39 44
Pre-flood treatment with a foliar spray of pyrethroid 36 37
Pre-flood treatment with a pyrethroid impregnated on fertilizer 21 22
Post-flood treatment with Trebon 20 10
Early planting to avoid infestation 18 31
Dermacor X-100 Seed Treatment 17 52
Pre-flood and Post-flood treatment with a pyrethroid 13 N/A
Delayed application of permanent flood 13 27
Pre-flood treatment with Trebon 9 7
Nothing 6 7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

There was a decrease in the percentage of respondents who reported that they drained a field for weevil management while their was a substantial increase in the adoption of seed treatments and cultural practices (early planting and delayed application of permanent flood) which should result in decreased weevil injury.

The next installation in this series of blog posts will focus on questions related to rice stink bug management.  Do these observations reflect what you experienced in the 2009 or 2010 production seasons?

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This is a reminder about the rice field clinic to be held tomorrow morning. Reeton School road is located about 2 miles south of the caution light on Hwy 13 at the Mamou / Oberlin rd. intersection. At Reeton School rd. turn east, go to the 1st curve, (1 mile), and continue straight on the field rd. You should be able to see vehicles straight ahead of you on the field rd.

At the second stop, at Kody & Larry Biebers, we will have refreshments and snacks.

News Release

By Keith A. Fontenot

County Agent, Evangeline Parish

            The Evangeline Parish LSU AgCenter Cooperative Extension Service will hold its Annual Rice Field Clinic Tuesday, May 25, 2010 beginning at 8:00 a.m.  This year’s clinic will feature variety trials, fertilization, weed, insects and diseases of rice.

            Please join us on this day for a morning rice field tour.  We will meet at the agronomy plots first, at B & R Farms which are located one mile East of Highway 13 off of Reeton School Road.   After that part of the program we will travel about 3 miles North on Highway 13 to Bieber Road, then one mile west to the Kody & Larry Bieber farm bins for the rest of the tour program.

8:00—8:15 am  Arrival at  B & R farm field on Reeton School Road, Dr. Harrells Agronomy plots, site of Colaspis find

8:15—8:35        Dr. Harrell- Plot Research on Avail, Organolize, P, K, & Zn plots

8:35—9:00         Dr. Hummel—Dermacor, Cruiser Plot work, Colaspis & Weevil Control

9:00—9:15        Travel to Bieber Farms, site of variety test plots on Bieber Rd., 1 mile West of Mamou

9:15—9:35        Variety Development at the variety plots along the road, Drs. Linscombe & Sha

Under the oak tree:

9:40—10:00      Dr Saichuk—Growing Season Update, Field Situations

10:00—10:20    Dr Webster—Herbicide Application Updates; Other ??

10:20- 10:40     Dr. Groth—Fungicides; New Products,  Application Rates, Timing

10:40-11:00      Dr. Salassi—Market Update

Plenty of refreshments and snacks will be served, courtesy of RiceTec seed.  Even though you may not be able to stay for the entire meeting, we would like to have you visit with us as long as you can.

The LSU AgCenter prohibits discrimination in all its programs and activities on the basis of race, color, national origin, gender, religion, age, disabilities, political beliefs, sexual orientation, and marital or family status.   Persons with disabilities, who require alternative means for communication of program information or other assistance, should contact the Evangeline Parish office of the LSU AgCenter at (337) 363-5646.

Keith A. Fontenot

County Agent/Parish Chairman

Evangeline Parish

Office – (337) 363-5646

Cell – (337) 290-0510

Fax (337) 363-1210

E-Mail (kfontenot@agctr.lsu.edu)

Website (http://www.lsuagcenter.com)

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Today I met Dr. Dustin Harrel (Rice Agronomist, housed at the rice research station at Crowley) at his agronomy test plot location in Evangeline Parish.  Dustin had called me last Friday because he was seeing stand reduction in his test plots and found that colaspis larvae were causing the damage.  I recommended that he put a flush across the field immediately.  The field was flushed and then we had to wait for it to firm up to take some data on the damage caused by the colaspis. 

Today, we evaluated the plots and decided the best way to start to assess damage would be to measure the length of the gaps where plants were killed by colaspis larvae feeding on the roots.  Dustin’s assistants – Jacob and Ron – graciously assisted with the measuring of the gaps. 

Each plot is 7 rows wide. Jacob measured the length of all the gaps caused by colaspis. At the end of the season we will take yield.

 

It was not hard to find the damage in the field, but it did turn out to be hard to find the culprit.  

Misses in drill rows were caused by colaspis larvae feeding at the base of the plant.

 

After much persistence in searching (while we measured gaps) Dustin found a colaspis larva in one of the plots on the edge of the test area. 

Colaspis larva that was found feeding on the base of a rice plant.

 

Dustin has agreed to let us monitor the colaspis damage in 12 of his test plots.  These plants were grown from seed treated with Dermacor X-100.  Unfortunately, we do not have any plots in this test treated with CruiserMaxx or untreated for comparison.  As usually happens in science, colaspis have not caused any damage in any of my “planned” test plots.  I am hoping we will learn more about the biology of this pest in these test plots.  One thing we have already learned from this location is that a flush really did help the situation.  When he first saw the damage in the plots, Dustin said the plants were producing red leaves, almost like they had suffered herbicide injury.  Now, those damaged plants are hard to find because they have dried up and died.  The rest of the plants seem to be doing very well.  

We will continue to monitor these plots for the duration of the season.  This site will also be a tour stop on the Evangeline Parish Rice Tour, May 25, 2010.  Please check the blog for an announcement about the tour.  If you’d like a refresher on how to scout for colaspis please view the scouting video posted at the LSU AgCenter website, or the powerpoint presentations posted from the training we conducted in May 2009.

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Today we met with cooperators in St. Landry to look at the differences in stand emergence between the insecticide treated (Dermacor X-100, CruiserMaxx) and non-insecticide treated seed (fungicide only).  This location is a joint effort between LSU AgCenter, Horizon Ag, DuPont and Syngenta.  We are evaluating CL151 planted at a variety of seeding rates (#40, #55, #65, #70, #85, #100).     

Dermacor X-100 treated seed to left of flag, untreated seed (fungicide only) to right of flag.

 

 There was no noticeable difference between the Dermacor X-100 and CruiserMaxx treated seed.  These were both planted at 65 lbs per acre.     

Dermacor X-100 treated seed to the left of flag, CruiserMaxx treated seed to the right. No visible difference in stand at this time.

 

 CruiserMaxx is applied at 3.3 fl oz/100 lbs seed, regardless of seeding rate.  One of the objectives of this test is to confirm that CruiserMaxx provides the same level of rww control at low and high seeding rates.  The seeding rates that we are evaluating include the following: 40, #55, #65, #70, #85, #100.  At this point, there is no real visible difference in stand, except when comparing the high (#100) to low (#40).    

CruiserMaxx treated CL151 - plants are just beginning to emerge from the ground. Planted at 40 lbs/acre.

 

CruiserMaxx treated CL151 seed planted at 100 lbs/acre.

 

 We dug around in the untreated area for a little while to see if we could find colaspis larvae feeding on the roots.  We did not find any today.  We’ll return to take stand counts in about two weeks.  These first few weeks of the test are critical for detecting colapsis damage, if it occurs.    

Scouting for colaspis in untreated check area.

 

In the above picture, Dermacor X-100 treated seed is to the LEFT of the white flag.  Untreated area is to the right of the flag.

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Yesterday we planted two demonstration sites.  We started bright and early at Charlie Fontenot’s farm in St. Landry Parish.  Michael Fruge and Sunny Bottoms (both with Horizon Ag) brought their 20 foot Great Plains drill out to the site.  Vince Deshotel met me a the farm office and told me that he had received a call from Kent Guillory telling us that Dave Morein decided to plant his colaspis test site that afternoon.  So, it turned out to be a full day of rice planting. The weather could not have been better and the blue skies with white fluffy clouds were breathtaking.

Planting started with two passes of CL151 seed that was not treated with an insecticide.  This untreated area borders the field road and is next to a marshy area with trees.  There is a good chance that if weevils are overwintering, they will be found near this edge of the field.

After two passes of untreated seed, we cleaned out the drill, and loaded sacks of Dermacor X-100 treated CL151.  6 passes of Dermacor treated seed was planted at the 65 lb seeding rate.  The drill was cleaned out again and loaded up with CL151 treated with CruiserMaxx.  At this point, we started planting a seeding rate trial.  CL151 was planted at a variety of seeding rates.  This will give us a chance to evaluate CL151 at different seeding rates, and also the efficacy of CruiserMaxx at a variety of seeding rates.

This site was chosen because Charlie is suspicious that he experienced stand loss from Colaspis larvae damaging seedlings last season.  If the colaspis show up this season, we will be able to compare Dermacor X-100 and CruiserMaxx activity against this pest.  Also, in the past Charlie has treated with pyrethroids for weevil management.  We are curious to see what the rww population is typically like at this site.  Of course, this year may not be a typical year.  That remains to be seen.

I asked Charlie to call me when first emergence of seedlings is observed.  We’ll take observations on date of first emergence, and then stand counts and plant height 14 days after emergence.  If colaspis are a problem in this field, the damage will be observed in those first few weeks after emergence.

We left Charlie’s at about 11 am to head over to Evangeline Parish.  On the way Dave called, because there had been a break-down and planting would be delayed until about 2 or 3 pm.  No problem, we just took our time heading east.  When the time was right, we headed over to meet Dave Morein, Brian (Dave’s son who is now farming with him full-time), and Dennis Fontenot (Consultant).  When we pulled up dark clouds were threatening and rain started sprinkling lightly as we were planting the last field.

This series of fields is bordered on three sides by Miller Lake and a thick stand of trees.  Historically, there are high populations of rice water weevils.  Dennis had scouted this field site for us last season to monitor the adult colaspis in a field of beans next to a cut of rice that had substantial stand loss from colaspis damage.  In this test we will again compare an untreated check to CruiserMaxx and Dermacor X-100 seed treatment.

When we arrived, Dave had some Dermacor X-100 treated seed still loaded in the drill. left-over from planting another field.  We vacuumed out the hopper and loaded untreated seed.  This series of fields is planted in CLXL729 at a 25 lb seeding rate.  In our test, we are comparing an untreated field, and two passes on the south side of a neighboring cut (both are the high points in this area) to Dermacor X-100, and CruiserMaxx treated fields.

We will be scouting intensively during the first two weeks after emergence to see if the colaspis larvae overwintered and may cause damage in the rice.  Dennis had GPS marked his sampling sites in the untreated rice field and we will mark those with flags and sample the area for larvae.  It will be interesting to see if there is a relationship between the adult colaspis population in the soybeans last season, and the population of colapsis larvae in the  seedling rice this season.

I’m not sure what transpired with the rain that was just starting to come down when we left the field.  I’ll be checking in with Kenneth LaHaye this afternoon.  Tentative plans are to plant at the LaHaye farm in Evangeline Parish tomorrow.  Of course, it all depends on the weather.  We also may plant in Acadia, Concordia, and Evangeline Parish this week.

Sorry I did not include pictures, I need to load my download cable in my camera bag.  I’ll try to add pictures in the next few days.

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This morning I met County Agent Barrett Courville at the Acadia Parish Extension office.  Barrett grabbed his rubber boots and we headed out to meet with Mr. Rustin Gilder at the Hoffpauir farm.

County Agent Barrett Courville and Mr. Rustin Gilder discussing the rww demo at the Hoffpauir farm.

The Hoffpauir farm is located in southwest Rayne, LA.  The fields we will studying this season, are on the north side of the field road from the fields we evaluated in 2009.  This makes a unique opportunity to look at the weevil population over time.  This season we will compare CruiserMaxx, Dermacor X-100, pyrethroid to an untreated check.  We pulled up some of the field stakes from last season and I saw a nice little black and yellow snake – boy that will wake you up!

In Crowley, just south of I-10 we met with (left to right) Mr. Charlie Harmon, Barrett Courville, Jude Bellard, and Doug Leonards.

After wrapping up at the Hoffpauir farm, we headed over to meet with Crop Consultant Doug Leonards, and Farmers Charlie Harmon and Jude Ohlenforst.  Doug had identified some colaspis damage in a rice field just north of this series of fields that were planted in soybeans in 2009.  Doug scouted the bean field for colaspis adults and sent us samples throughout the season.  This year, the field will be planted into rice.  We decided to have a ten acre section treated with CruiserMaxx within this approximately 80 acre field.  If the colaspis cause a reduction in stand, we will be able to compare the untreated seedlings to those grown from CruiserMaxx treated seed.  We’ll also be noting date of first emergence, stand count, and plant height.  If there is a reduction in stand in the untreated area, we’ll pull cores before flood to see if we find colaspis larvae on the roots.

The Lawson family (left to right) Larry, Alan, and Colin with County Agent Barrett Courville in Crowley, LA.

Our final stop was to visit with the Lawson family about a test we will be putting out with Michael Fruge (Horizon Ag) and Steven Thevis (G&H).  I was delighted to meet three generations of current (and future) farmers.  Colin told me that he wants to be a farmer when he grows up, but his dad said that he needs to go to college first.  Well, he’s comfortable running around rice fields already.

At the Lawson farm, we will be putting out a test comparing CruiserMaxx to Dermacor and an untreated check.  Alan is fairly certain that he suffered some stand loss from colaspis larvae damaging roots in a nearby rice field.  The field we will work in this year was planted in beans, the stubble was plowed in the fall, then water was held until December when the land was water-leveled.  Water was held until late January, so for a period of about 3 months in total.  It will be interesting to see if colaspis have survived those conditions.

While we were standing in the field Alan walked around and picked up some debri.  It is odd to find that in a prepared rice field that is set-back from the road.  Alan pointed to a row of Oak trees where the leaves were all removed.

The oak trees in the middle of this break that have leaves removed, mark the path of a tornado that destroyed 10 homes, and narrowly passed the Lawson home.

These trees mark the path of a tornado that passed through this rice field on Christmas Eve, 2009.  10 homes were destroyed, and Alan witnessed the tornado picking up and throwing debris at his house.  Debri was strewn across the rice field as well.  Amazingly, no one was injured.  I don’t think the tornado would have effected the colaspis, we can only hope…

The weather was perfect today – this rice field was firm enough to walk on.  If the weather holds, a lot of rice will be planted in the next week.  The first rice was water-planted in Jeff-Davis Parish last Friday.

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Yesterday I visited with cooperators in Evangeline and St. Landry Parishes to discuss this years demonstration sites.

Meeting with (from left to right) Kent Guillory, Keith Fontenot and Kenneth LaHaye at the Evangeline Parish AgCenter office.

County Agents Keith Fontenot and Vince Deshotel and I met with the Morein family, Mr. Kenneth LaHaye and certified crop advisors, Kent Guillory and Dennis Fontenot.  The topic of discussion was plans for the rice water weevil and colaspis demonstration sites.   At Kenneth’s farm we will evaluate the following rww treatments: CruiserMaxx, Dermacor X-100, Pyrethroid and an untreated check.  The pyrethroid treatment will be a shot of Karate with the last application of newpath before permanent flood.  We will come in one week after permanent flood and scout for the presence of adult weevils.  If present, we will make a second application of pyrethroid.

At the Morein farm we will be looking at colaspis management – if they show up in the field.  An adjoining rice field suffered a reduction in plant stand due to colaspis infestation in the 2009 season.  We worked with Mr. Dennis Fontenot to sweep the soybeans in a neighboring field.  Dennis collected data on colaspis density in the beans and also sent us samples for species identification.  This year, rice will be planted into the bean field we  sampled for colaspis adults in 2009.  We have arranged treatments of CruiserMaxx, Dermacor X-100 and some untreated areas in the rice field.  I certainly hope we don’t have problems with colaspis again this season, but if we do, we should be able to learn more about colaspis management.

St. Landry Parish Rice Farmer Charlie Fontenot, Consultant Dean Reed and County Agent Vince Deshotel scouting for colaspis in bean stubble.

After we finalized our plans for the rww and colaspis demos in Evangeline Parish, Vince and I headed over to St. Landry Parish.  I had not realized that St. Landry is such a large Parish.  We stopped at a beautiful spot near a Bayou outside of Palmetto, LA that is farmed by Charlie Fontenot.

Crop Consultant Dean Reed and Charlie are fairly certain that they suffered about a 10% stand loss from colaspis feeding on rice seedlings in 2009.  This resulted in re-planting on high ground in about 200 of the 2,000 acres of rice that Charlie grew last season.  We decided to work with Micheal Fruge (Horizon Ag) on a seeding rate evaluation with some clearfield varieties.  CruiserMaxx will be used as a the seed treatment at multiple seeding rates.  This will give us a chance to evaluate activity at both standard and low seeding rates.  We will also compare to Dermacor X-100 and an untreated check. I don’t know if the colaspis will show up in the rice, and hopefully they don’t turn out to be a problem this season.

Out of curiosity, we dug around in the soybean stubble at a high elevation on the farm to see if we could find any colaspis grubs.  We found an abundance of earthworms and a few other critters in the soil, but no colaspis.  It is possible that they are still down low in the soil profile.  The soil temperature was 69F, and had very nice tilth.  It was nice to give my hands a break from the keyboard for a change.  This should be an interesting test location, and if nothing else it sure is beautiful scenery.

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