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Posts Tagged ‘Rustin Gilder’

We had an excellent crowd at the final stop of the LSU AgCenter south farm tour in Crowley, La this morning. For those of you that could not attend, here is what was discussed:

The RWW is the most important insect pest of rice in Louisiana. Adults enter fields either before or after permanent flood. Injury begins when adults feed on plant leaves, making longitudinal scars. If scarring is excessive the field will sometimes have the appearance of being “painted” with white paint. In some instances adult feeding can be severe enough to merit an insecticide spray before application of permanent flood. Mating commences soon after adults enter the field, but oviposition of eggs occurs after application of permanent flood. Larvae hatch from eggs, feed briefly within the leaf sheath, and then swim through the flood water to burrow into the mud and begin feeding on the roots of the rice plant. This larval feeding on the roots is the primary source of damage caused by rice water weevils when they attack the rice plant. In some cases, root pruning can be so severe that plants will fall over in the field. In other cases, root pruning in not severe enough to cause lodging but can still significantly reduce yield.

Acadia Parish – Simon Farm

Location: South of Crowley, LA – at the intersection of Leger and Nelson Roads.

You can find a map of the field site by clicking here. The purpose of this demonstration test is to compare currently recommended insecticides on commercial farms in Louisiana. This year are comparing three insecticide seed treatments (CruiserMaxx, Dermacor X-100 and NipsIt INSIDE) to an untreated check.

Cooperator County Agent Consultant Variety Seeding Rate
Glen & Wes Simon Barrett Courville Rustin Gilder XL745 22 lbs/ac
Date Activity Date Activity
3/16/2011 Planting 5/18/2011 Permanent flood
4/03/2011 Stand count 6/14/2011 RWW Core sampling

04/03/2011 – Stand counts – 2 weeks after seedling emergence

Method of data collection: Counting the number of plants and taking plant heights on ten randomly selected plants at five random locations in each strip.

We did not notice any obvious visual differences between seed treatments.

06/14/2011 – Core sampling- 4 weeks after application of permanent flood

Method of data collection: Core samples gathered by walking through the field pulling cores at equally spaced intervals across the field. 10 samples were taken in each cut (20 cores/treatment).

RWW core data is an average of 20 cores/treatment.

Treatment Average # rww
CruiserMaxx

1.5

Dermacor X-100

0.5

NipsIt INSIDE

1.15

Untreated

2.4

The infestation at this field site did not turn out to be severe enough to justify the cost of a seed treatment, but at some of our other test sites the infestations have been severe. We have collected up to 40 larvae in a single core. Once we are finished with all the core samples and can compare to the small plot trials Mike Stout is conducting at the LSU AgCenter rice research station, we will let you know how all the seed treatments have performed this season.

For Further Information:

If you have any questions about RWW management or this demonstration please contact your local County Agent Barrett Courville or LSU AgCenter Extension Entomologist Natalie Hummel at nhummel@agcenter.lsu.edu.

Acknowledgements:

We would like to thank all the cooperators, consultants, sales reps, and dealers participating in this trial. Generous support for this demonstration test has been provided by the Louisiana Rice Research Board, DuPont Crop Protection, Valent, Syngenta, FMC, G&H, and Landis International

A lunch was served that was sponsored by Dupont (Toby McCown), Syngenta (Josh Zaunbrecher), and Valent (John Bordlee). Rustin Gilder also provided a tent and tables for the lunch area. You can’t put a price on the value of shade in the middle of the summer (oh, wait, we are only two days in… guess it will be a long one). We appreciate their on-going support of the LSU AgCenter rice extension entomology program.

Rice stink bugs are starting to show up in some of the fields that are heading. I’ll post a blog about this pest tomorrow.

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Today Anna and I met with County Agent Barrett Courville and Crop consultant Rustin Gilder at the Acadia Parish demo site which is farmed by Glen and Wes Simon. We were pleased to find a healthy, rigorous stand of rice. Much of the field is already at tillering stage just two weeks after seedling emergence! This location was planted with XL745 at #25 seeding rate.

We used the same method as last year – counting the number of plants and taking plant heights on ten randomly selected plants at five random locations in each strip.

Anna Meszaros and Barrett Courville taking stand data in Acadia Parish.

We did not notice any obvious visual differences between seed treatments (at this location we are comparing CruiserMaxx, Dermacor X-100, NipsitInside to an Untreated check). The following series of pictures includes every possible side by side comparison of treatments:

Rice grown from CruiserMaxx treated seed to the right and Dermacor X-100 treated seed to the left.

Rice plants grown from CruiserMaxx treated seed to the right and Untreated seed to the left.

Rice grown from Dermacor X-100 treated seed to the right and NipsitInside treated seed to the left.

Rice grown from NipsitInside treated seed to the right and CruiserMaxx treated seed to the left.

Rice grown from seed treated with NipsitInside to the right and untreated seed to the left.

Rice grown from Untreated seed to the right and Dermacor X-100 treated seed to the left.

It was not difficult to find rice water weevil adult scarring in the field. We did not observe any rice water weevils.  The field had recently received a flush. It was difficult to assess a difference in the severity of scarring between treatments, but our sense was that it was a little more prevalent in the untreated strips.

Rice water weevil adult scarring injury on an untreated plant.

We will continue to monitor this field for any other insect problems that might occur. The next step will be to take rice water weevil core samples four weeks after permanent flood.

It sure is dry out there – we could use some good rain. In these dry conditions it is important to remember to actively scout for chinch bugs – they tend to thrive in these dry conditions, especially if weeds or pasture near a rice field start to dehydrate.

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On Friday I headed out to scout rice in Jeff Davis Parish with County Agent Barrett Courville and Consultant Rustin Gilder. We scouted a field where Rustin had found a single colaspis larva. After much time spent digging, we were not able to locate any additional larvae. Unfortunately with this pest, that is not confirmation that it was/is not in the field. The larvae may have pupated and emerged as adults, or we may have simply been searching in the wrong area in the field.

A video on how to scout for colaspis in rice can be accessed by clicking here.

The farmer planned to bring permanent flood soon. No insecticide seed treatments had been applied to the seed. Thus, due to the reduced stand from a combination of factors (poor germination, dry conditions, and probably colaspis injury), we advised using a pyrethroid to prevent further injury from rice water weevils. Rice water weevils were already active in the field, as indicated by feeding scars on the leaves. To further complicate matters, there are crawfish ponds nearby. To avoid pesticide drift on the crawfish ponds, we suggested using mustang impregnated on fertilizer both before and after application of permanent flood (based on scouting for adults after permanent flood). A strategy to control rice water weevils is particularly important in this situation, where the stand will be thin at the time of permanent flood and weevils are already actively feeding in the field. When the stand is thin, there tends to be a more severe infestation of rice water weevils.

During my discussions with the consultants and producers we met in the field, it sounds like a lot of rice is at or near permanent flood is southwest Louisiana. Many of the consultants also reported that rice water weevils were present in most of the fields. If you used a seed treatment (CruiserMaxx, Dermacor X-100 or NipsitInside) your rice should be protected from injury due to rice water weevil larvae feeding on the roots.

Keep in mind that if you plan to use a pyrethroid to control rice water weevils, it is important that the timing of the application is correct. The pyrethroid chemistries have a window of activity of about two to three days under ideal conditions. We recommend scouting for the presence of adults and/or feeding scars.

A video on how to scout for rice water weevils in rice can be accessed by clicking here.

Rice water weevil adult on a rice leaf.

Rice water weevil adult feeding scars. If these are present, then weevils are or were in the field.

If adults and/or feeding scars are present in the field you may consider using a pyrethroid to control the adults before they have a chance to lay eggs. Adult rice water weevils mate on the plants, and then the females swim below the surface of the water to lay their eggs in the leaf sheath below the water line. This is why it is important to kill the adults before they have a chance to lay eggs. Once the larvae hatch from the egg mass and swim down to the soil level to attack the rice roots, they can no longer be effectively controlled by a pyrethroid insecticide spray. Rice water weevils impact yield by feeding directly on the roots of the rice plants, causing pruning and negatively impacting the ability of the plant to take up soil nutients and produce an optimal yield.
 
Please contact your local County Agent for more information about rice water weevil management in Louisiana.
As a final note, please send me an e-mail if you find aphids or armyworms in rice in Louisiana. We need specimens for our laboratory colonies in Baton Rouge.

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On March 16, 2011, we planted our first site for the 2011 LSU AgCenter rice water weevil demonstration test.

Acadia Parish County Agent Barrett Courville following the drill as we planted the test plots.

The purpose of our rice water weevil demonstration test is to compare currently recommended seed treatment insecticides on commercial farms in Louisiana. This year we are comparing three insecticide seed treatments (CruiserMaxx, Dermacor X-100 and NipsitINSIDE) to an untreated check. 

Rustin Gilder walking near the flagging on the edge of the plots. Flagging is color-coordinated with the treatments to make it easier to monitor progress during the season.

Here are the details about the Acadia Parish test site:

Parish Acadia
Cooperator Glen Simon & Wes Simon
County Agent Barrett Courville
Consultant Rustin Gilder
Distributor Crowley Grain
Variety XL745
Seeding rate 22
Drill width 36
Length of field 700
Acres per treatment 10.00
Total acres 40
Total lb seed 220
CruiserMaxx – A 15.4 fl oz total
Dermacor X-100 – B 17.5 fl oz total
Nipsit-Inside – C 4.22 fl oz total
Untreated – D no insecticide

We will take stand counts and plant height data 2 weeks after seedling emergence.  To assess insecticide efficacy, we will collect rww soil cores 4 weeks after application of permanent flood.

Field map with color-coding for the treatments. Feel free to drive by and watch the field as the crop matures during the season.

We intend to have a tour stop at the demo test site at the conclusion of the LSU AgCenter South Farm Tour this summer.  Please monitor the blog for an announcement about the date and details.

Acadia Parish Demo test cooperators Wes Simon, Rustin Gilder, Terry Istre and Barrett Courville.

We greatly appreciate the tremendous effort in time and land-use by our cooperators. We will keep you posted on the progress at this site.  For additional information, please contact Barrett Courville.

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This week we’ve continued to travel the state and meet with cooperators for the LSU AgCenter rice water weevil (rww) demonstration test. In case you are a new reader to the blog, you can read more about rww at http://bit.ly/haGduU. You can also see a video on how to scout for rice water weevil adults and larvae at this website: http://bit.ly/gUJe8R

RWW are the most important insect pest of rice in Louisiana. Adults enter fields either before or after permanent flood.  Injury begins when adults feed on plant leaves making longitudinal scars. If scarring is excessive the field will sometimes have the appearance of being “painted” with white paint. In some instances adult feeding can be severe enough to merit an insecticide spray before application of permanent flood. Mating commences soon after adults enter the field, but oviposition of eggs occurs after application of permanent flood. Larvae hatch from eggs, feed briefly within the leaf sheath, and then swim through the flood water to burrow into the mud and begin feeding on the roots of the rice plant. This larval feeding on the roots is the primary source of damage caused by rice water weevils when they attack the rice plant. In some cases, root pruning can be so severe that plants will fall over in the field. In other cases, root pruning in not severe enough to cause lodging, but can still significantly reduce yield.

The purpose of our rice water weevil demonstration test is to compare currently recommended insecticides on commercial farms in Louisiana. This year we are restricting our test to comparison of three insecticide seed treatments (CruiserMaxx, Dermacor X-100 and NipsitINSIDE) which will be compared to an untreated check. These products were described in my last blog posting, so I won’t spend a lot of time describing them here.

Yesterday we met with Farmer Charlie Fontenot, Crop Consultant Dean Reed, and County Agent Vince Deshotel in St. Landry Parish. Charlie cooperated with us last year, and his farm had the most severe rice water weevil pressure of all locations. It will be interesting to see what we find this year. Charlie intends to plant XL745 at a seeding rate of 25 lbs per acre. We will plant two passes (reps) of each seed treatment, which will be compared to an untreated check. There is a good chance that we will plan a field meeting at this site sometime later this summer. We anticipate planting in mid-March.

After we completed our discussion about demo test plans, Bruce Schultz joined us to interview Charlie Fontenot for a feature story in Louisiana Farm and Ranch. Charlie was honored as St. Landry Parish Farmer of the Year for 2010. An accomplishment that he certainly deserves. Charlie has ramped up his production over the last few years and runs a beautiful operation in St. Landry. Look for the story in next month’s issue of Louisiana Farm and Ranch.

Today we met with Farmer Wes Simon (and his son Ethan), Crop Consultant Rustin Gilder, and County Agent Barrett Courville in Acadia Parish. 

County Agent Barrett Courville, Farmer Wes Simon and I discussing plans at the field in Acadia Parish.

This is our first year working with Wes and his father Glen.  Wes intends to plant either XL729 or XL745 at a seeding rate of 22 lbs per acre. 

Wes Simon measuring out the plot size with his tractor.

The planting arrangement will be the same as at Charlie’s farm – two passes for each seed treatment which will be compared to an untreated check. Depending on the weather this weekend, Wes will probably plant sometime next week. There is a good chance we will have a tour stop here in conjunction with the LSU AgCenter south farm tour this summer.

After we left Wes, we headed over to Calcasieu Parish to meet with Farmer Mark Stelly, Landowner Johnny Hensgens, Crop Consultant Randy Verret and County Agents Jimmy Meaux and Dusty Zaunbrecher. 

County Agents Jimmy Meaux, Dusty Zaunbrecher, Farmer Mark Stelly, and Johnny Hensgens discussing plans for the demo test site.

Plans for the demo field site in this parish will be very similar to our set-up in Acadia Parish. Mark intends to plant XL745 at a seeding rate of 25 pounds per acre.  Again, depending on the weather, this site will be planted sometime before early April.

Now we are headed to Breaux Bridge for their annual winter rice production meeting at 6 pm tonight at the St. Martin Parish LSU AgCenter office. I’ll discuss seed treatments for rice water weevil management.

All photos taken by Anna Meszaros.

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Today we had a nice, but very warm, meeting at the conclusion of the LSU AgCenter Rice Research Station South Farm Tour.  

Farmers, Consultants and Dealers listening in to the presentation at the Hoffpauir Farm in Rayne, La. (photo by Tiffany Pasco)

 

We met at the Hoffpauir farm to discuss the results of the rice water weevil demonstration.  The purpose of this demonstration is to evaluate the use of some currently available insecticides to control rice water weevils in rice fields.  This location has a very nice layout with multiple cuts of the seed treatments (CruiserMaxx and Dermacor X-100) and also two pyrethroid treated cuts.  These treatments were compared to an untreated cut. 

This location was planted in CL111 at a 65 pounds per acre seeding rate.  Rice was drilled in to a water-leveled prepared seedbed.  The field was planted in soybeans in the 2009 season.  Mr. Darryl Hoffpauir farms these fields and his consultant is Mr. Rustin Gilder (Crowley Grain).  County Agent Barrett Courville coordinated the test location.  We would like to thank Barrett, Darryl and Rustin for their efforts in this demonstration test.  

Below is a description of the activities at the field this season.

Activity Date
Planting 3/23/2010
First emergence 4/03/2010
Scouted for first pyrethroid application 5/04/2010
First pyrethroid application (Karate) to dry ground 5/04/2010
Permanent flood 5/04/2010
Scouted for second pyrethroid application 5/13/2010
Second pyrethroid application (Mustang on fertilizer) into flood 5/17/2010
RWW Core samples taken 6/01/2010

Method of data collection: 

Four weeks after permanent flood we gathered core samples by walking through the field from one corner to the opposite corner in an S-shaped pattern and pulling cores at equally spaced intervals across the field.  RWW core data is an average of 10 cores/field.  Below is our overall level of control from the different treatments.  We had a relatively low weevil population at this site, but all products evaluated provided excellent control.

Treatment Average # rww % Control
CruiserMaxx 0.1 96.6
Dermacor X-100 0.1 97.7
Pyrethroid 0.4 90.7
Untreated 4.3  

  

The percent control column indicates relative activity of each insecticide by comparison to the population in the untreated check.

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