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A Section 18 request has been approved by EPA for the use of Tenchu 20SG on up to 100,000 acres of Louisiana rice to control rice stink bugs. Click here to read about biology and management of rice stink bugs. This product will provide an alternative mode of action to the pyrethroids that are currently registered for use in Louisiana. The exemption expires October 31, 2012. The distributor in Louisiana is Mr. Michael Hensgens with G&H in Crowley. According to Mr. Hensgens, the suggested retail price is $24.30 lb at ½#per acre = $12.15/ac.

Rate and restrictions: Please contact your local County Agent for a copy of the Section 18 registration before using this product. Remember that the label is the law! The registered rate is from 7.5 to 10.5 oz of product per acre. A maximum of two applications can be made per acre per season. A seven day pre-harvest interval must be observed. Be aware that this product is toxic to honeybees – read the Section 18 registration for precautions to avoid bee injury.

Treatment threshold:We do not recommend treating until you exceed the recommended thresholds as described on the Section 18 label (the current label reads that you should follow the Texas guideline – this has been amended to reflect LSU AgCenter recommendations in pub 2270). To scout for rice stink bugs in the field, use a 15-inch diameter sweep net, take 10 sweeps at 10 different areas around each field. Count the number of bugs collected after every 10 sweeps and then treat if they exceed the threshold as described in LSU AgCenter Publication 2270. During the first two weeks of heading, treat when there are 30 or more stink bugs per 100 sweeps. From the dough stage until 2 weeks before harvest, treat fields when there are 100 stink bugs per 100 sweeps.

Before we consider applying for an emergency exemption next field season (should we feel it is warranted) we need to gather some specific data. We need your assistance gathering this information.

1. Resistance. Please notify us if you believe that you have a stink bug population that is resistant to pyrethoids. We will gather insect samples to run laboratory bioassays to screen for insecticide resistance.

2. Efficacy. If you use Tenchu 20SG we would appreciate any data you gather on residual efficacy of the product. Data from Texas has indicated that it provides a longer window of activity than pyrethoids. This will potentially result in a reduction of the number of insecticide applications to a field in one season. We will be conducting efficacy trials in Louisiana to measure residual efficacy when compared to pyrethoids. If you’d like to participate in a field demo, please contact your local County Agent and they can work with me to make arrangements.

3. Milling. We also need your assistance in gathering data on milling quality of rice. Specifically, we need more data on reductions taken at the mill in the form of peck and broken grains which is attributed to Rice stink bug feeding injury. Any information you can provide on grade reductions attributed to rice stink bug feeding injury will be appreciated.

Please contact me if you need additional information.

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Last week, Dr. Saichuk handled some insect related rice field calls. I thought you’d like to learn about his observations and how he recommended handling the pest problems. The problems were reported on the Louisiana crop blog. Click here for a link to a field Johnny scouted that had a thrips infestation. Learn more about thrips in rice at this linkClick here for a field Johnny scouted that had a rice water weevil adult infestation that was causing defoliation and death of seedlings. Click here for a fact sheet on rice water weevils.

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Pest alert: scout for armyworms in rice near wheat

Armyworms have recently been reported causing injury in Arkansas rice. Click here for a report I read in Oryza news this morning about the armyworm situation in Arkansas. I haven’t had calls about armyworms in Louisiana this season, but we should be aware of the situation with armyworms moving from wheat to rice. A similar situation could occur in Louisiana. The Louisiana wheat crop is maturing more quickly than usual and Sebe Brown recently reported  army worms in wheat in north Louisiana.

So, if you are scouting a rice field near a wheat field, you should watch out for armyworms in the wheat that may march over into the rice. Click here for a fact sheet on armyworms in rice. If you treated your rice with Dermacor X-100 seed treatment it should be protected from armyworm injury. If you used CruiserMaxx or NipsitInside seed treatment you will not have protection from armyworms. Keep this in mind as you make your scouting plans this season.

Rice water weevil sampling plans

Nick Colligan is resuming Karen Nix’s dissertation research studying the relationship between planting date and rice water weevil infestation levels in untreated rice fields. The first field he will sample is located in Vermilion Parish. The field went to flood on Saturday and we will pull core samples in 4 weeks. I’ll let you know what we find.

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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 am pleased to announce the release of the beta version of LSU AgCenter RiceScout app! The app was partially funded by a grant from the Southern Region IPM center and the Louisiana Rice Research Board. We greatly appreciate their support of this project. The creation of RiceScout was a tremendous team effort, including contributions from many faculty at LSU AgCenter, University of Arkansas and Texas AgriLife. The app was programmed by the Information Technology service unit at LSU AgCenter and editing was completed by the LSU AgCenter Communications service unit. Full credits to all authors and contributors can be found in the “About” section in the app. Special credit is due to Anna Meszaros who directed this project from start to finish.
The RiceScout app contains images, descriptions, and management information on insects, diseases and weeds that commonly occur in southeastern rice producing states. Information on crop fertility is also included. The purpose of the app to increase the speed and accuracy of rice fertility and integrated pest management crop decisions.
You can access a web-based version of the app at this link:
Please share this link with your contacts in the rice industry. The app should function on most smart phones and web browsers. Send an email to ricescout@agcenter.lsu.edu if you experience any technical difficulties or find an errors in the app.
We are in the process of developing a stand-alone app for the iPhone, iPad and Android – in the meantime, you can use this web-based version in locations where you have access to data on your phone.
To use the app, open up the link (http://ricescout.lsuagcenter.com) in your web-browser. A “splash” screen with the logo of the app will appear briefly on the screen while the app is loading in your browser. Once the app loads, you can use the touch screen on your smart phone to navigate through the content on the app. When you open the image galleries, you can navigate through the images by swiping on the phone screen. You can also zoom in for greater detail. Links to scouting videos and control recommendations can be opened up using links to websites within the app.
Hope your rice crop is moving along nicely. The rice I have seen in southeast Louisiana looks good.

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I am currently touring across the southeastern US rice production area as a member of the 23rd USA Rice Leadership Development Program class. This is the first of four sessions we will complete over the next two years. I’m enjoying the time with my fellow classmates who hail from across the US rice production regions.

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USA Rice Leadership 2012 Class (from left to right) Timothy Gertson from Texas, Rance Daniels from Missouri, Brian Barrett from California, Clint Roth from Arkansas, Brice Lauppe from California, myself and Noble Guedon from Mississippi and Louisiana.

We all met in Houston on Sunday (April 1) and our first day of tours began on April 2. The first morning was spent learning about the structure of the US Rice Federation and international rice trade. The USA Rice Federation contains four units that represent producers, millers, suppliers and consumers of rice:

  1. USA Rice Council – promotion of US rice
  2. USA Rice Producers Group – the farmer’s advocate
  3. USA Rice Millers Association – representing rice millers
  4. USA Rice Merchants Association – rough and seed rice merchandiser

The Rice Leadership Development program is administered by The Rice Foundation, an organization dedicated to rice industry research and education.

About 85% of US rice acreage is represented by the USA Rice Federation, while the other 15% is represented by the US Rice Producers Association. The Vision of the USA Rice Federation is to be the driving force of a profitable and unified US rice industry.
After we learned about the structure and purpose of the Federation, Bill Farmer spoke about US rice exports to Canada, Asia and Mexico. Mexico is a growing export market for US rice. Cooking demonstrations and TV shows are used to promote rice consumption in Mexico. After Mr. Farmer’s comments, we learned about the rice brokerage business from Michael Creed, of Creed Rice. You can visit riceonline.com to learn more about rice trading and the Creed Rice Report.
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 In this photo: Brice Lauppe and Noble Guedon discussing rice trading with Michael Creed.
In the afternoon, we toured the Anheuser-Busch plant in Houston, TX. One of the Brewer’s led our tour, which focused primarily on the brewing process. Anheuser-Busch is the largest domestic consumer of US grown rice. Rice is a key ingredient in many Budweiser products.
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In this picture – Tim Gerston and Chuck Wilson (USA Rice Federation) discussing grain deliveries with a brewer.
One of the most interesting things about the tour was the sights and smells. If you’ve ever brewed beer then you’ll be familiar with a lot of terms like wort, hops, and sparge – all terms that apply to specific phases of beer production. The mechanical processes used to produce beer on a commercial scale are remarkable. One thing I did not know is that the Lager is held in “Chips” tanks for a period of time before bottling. These tanks contain beech chips and are a traditional final step in beer brewing used by Anheuser (see photo below).
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On our second day in Texas, we struck out bright and early to visit the headquarters of Riviana Foods in Houston. The Riviana brand originated in Louisiana and the name is derived from a combination of “river” and “Louisiana”. Riviana has developed into a $1.2 billion corporation that is currently owned by Ebro Foods, a Spanish company. They distribute and market a variety of rice products as indicated in the photo below.
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Riviana and private label make up 50% of the US rice market. Riviana sells about 25 pounds of rice per second. While Mahatma is their no. 1 brand of rice, they are seeing great growth in the aromatic rice sector. During the presentation by their marketing director, Paul Galvani, we spent a lot of time discussing the increasing demand for ready-to-serve rice products.
During our trip across Texas, we also visited the US Rice Producers Association, Hlavinka equipment, the Gerston Farm in Libbey, Texas, and Rice Belt Warehouse. The conversation in Texas focused on water issues. Due to water shortages, about 70,000 rice acres will not be planted in Texas this year. The TX acreage reduction will impact farmers, but also millers, seed merchandisers, equipment dealers and other supporting industries.
Linda Raun met us at the Hvalinka Equipment Company. Mrs. Raun is a Texas rice farmer, graduate of the Leadership Progam, and current Chair of the USA Rice Producers Group. She traveled with us to the Gertson farm and spent time discussing the history of rice production in Texas.
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In this picture: Chuck Wilson, Linda Raun and Mr. Gerston (Texas rice farmer).
The Gertson’s have an impressive amount of diversification on their farm which includes a rice and cattle rotation, machine shop, precision farming equipment, and a flying service.
On our second day in Texas, we visited Doguet’s rice mill and RiceTec before we crossed the Sabine into Louisiana. I’ll pause for now and tell you more about our visit to RiceTec in my next post. If you want to follow us real time – follow the hashtag #usarice23 in twitter. You can also follow my tweets @NatHummel.

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I don’t often post information outside of the subject of rice entomology, but I believe that many of you would like this information. Read below about a comment period on a potential emergency registration of a fungicide for disease control in rice.

RE: ENVIRONMENTAL PROTECTION

AGENCY

[EPA–HQ–OPP–2012–0172; FRL–9341–7]

Fluxapyroxad; Receipt of Application for Emergency Exemption for Use on Rice in Louisiana, Solicitation of Public Comment

The public comment period is now open on the Louisianan petition for a Section 18 Emergency Application for Fluxapyroxad for use as a fungicide in the Louisiana rice crop in 2012. This emergency exemption has been requested for use in those areas where resistance has been identified to the strobilurin fungicides which have been widely used to control sheath blight disease in Louisiana rice production for a number of years. Last year it was confirmed that resistance of the disease causing organism has developed to the strobilurin fungicides which make them ineffective in controlling sheath blight in certain areas. Fluxapyroxad is a different class of fungicide that will control sheath blight in areas where this resistance has developed.  Fluxapyroxad is a BASF product that was tested as BAS700 and will be marketed in rice under the name Sercadis.

It is important that the USEPA receive a number of comments regarding this emergency exemption to the Louisiana rice industry. You are encouraged to send comments as individuals as well as organizations.

 

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