Posts Tagged ‘colaspis’

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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Sunrise over the beach in Biloxi, MS


This week, I’m at the 33rd annual meeting of the Rice technical working group (RTWG) in Biloxi, MS.  This meeting is a joining of all the rice research/extension faculty from across the US – and many from other countries – that occurs every two years.  For many of us research and extension folks, it’s a reunion and a chance to compare notes on what we have seen in rice fields across the U.S.  There are also a number of rice farmers and consultants at the meeting.  I met some growers from Texas who said that they started coming to this meeting because they learned about new technology one and a half years before it became common knowledge.  This gives them an edge in their production practices. 

Today, I enjoyed the presentations in the CCA training that was held before the opening reception of the meeting.  One of the presentations was about rice insect management practices.  Dr. Gus Lorenz (University of Arkansas) and Dr. Mo Way (Texas AgriLife) were the featured speakers on this topic.  They gave excellent presentations about rice insects management options – focusing on the new seed treatments that are now available to many producers in the south (CruiserMAXX and Dermacor X-100).  

Mo presented some interesting data on the effect of the Dermacor X-100 seed treatment on borer control in the ratoon crop.  He has found that Dermacor applied to rice that is seeded for first crop, also provides some level of control in second crop (this is measured by taking whitehead counts in test plots).  This is an interesting observation – especially as the borer complex becomes more important across the southern rice belt. 

Gus Lorenz reported on his evaluation of seed treatments to control colaspis and rice water weevil in Arkansas.  Both products provide good control of rice water weevil, but Cruiser provides much better control of colaspis.  Gus had some useful recommendations for those of you that are debating if seed treatments are worth the up-front investment of your money.  Under the following conditions he would recommend seed treatments: 

  1. High value seed with low seeding rates
  2. Less than optimum planting conditions (extremely early planting date, no till, margin seed quality)
  3. Known problem fields (history of rice water weevil or colaspis infestation)
  4. Varieties with poor seedling vigor

These are some good things to consider when making your seed treatment decisions.  Contact me if you have any questions about the new seed treatments. 

I am preparing two presentations for Wednesday during the plant protection panel.  I will talk about the results of the rice water weevil demonstration in 2008 and 2009.  I will also present a paper on the detection of colaspis in Louisiana in 2009 field season.  My associate, Anna Meszaros, is also presenting a poster on the results of the 2008 Louisiana rice insects survey.  Thanks to all of you who took the time to complete this survey.  The results have received considerable interest from the industry.  I’ll keep you posted on any other new research that I learn about at this meeting.

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