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Posts Tagged ‘EPA’

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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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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I just received word from Bobby Simoneaux, Louisiana Department of Agriculture and Forestry, that the EPA approved a Section 24C (special local need) for use of Dermacor X-100 in water-seeded rice in all 64 Louisiana parishes. This registration will expire on 2/6/2017. The purpose of this registration is to combat the recent detection of Mexican rice borer reproducing populations in western rice producing parishes of Louisiana. This registration is in addition to the existing Section 3 registration of Dermacor X-100 in dry-seeded rice.

Dermacor X-100 can be applied by a certified seed treater. Your local certified seed treater can provide more information on this specific use pattern.  To learn more about the seed treatments read this article. I’m in the process of writing a new article on seed treatment options for 2012. Please contact me if you have any questions about the current insecticide seed treatment options in rice.

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EPA has granted the Section 3 registration for Dermacor X-100 in rice. State labels for LA and MS are in the final approval process.  I will distribute the label when it is completed.

Dermacor X-100 will be evaluated in side-by-side comparisons with CruiserMAXX, pyrethroid and an untreated check in at least 5 commercial farm demonstration during the 2010 field season.  I am ironing out final details with cooperators.  I will send around field maps and treatment descriptions for each location when the fields are planted in the next two months.

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I am not sure if you have heard discussion about the new EPA, “Draft Guidance for Pesticide Registrants on Pesticide Drift Labeling”.  If this policy is enacted, it may drastically change the way we manage insects in rice production.  The EPA has requested comments on three documents: (1) Pesticide Registration Notice (PRN) Draft Pesticide Drift Labeling; (2) Draft Pesticide Drift Labeling Interpretation (Labeling Interpretation); and (3) Draft PRN Additional Information and Questions for Commenters.  If you would like to comment on this policy you can click this hotlink to access the EPA docket and the Comment area.

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