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Posts Tagged ‘crawfish’

The Mexican rice borer continues to move into rice producing parishes of Louisiana. In response to a recent increase in trap catches this season, and the presence of larvae in a rice field in Calcasieu Parish, LSU AgCenter scientists met at the rice station to develop a plan of action. We discussed many management strategies. These strategies are detailed in an article for Louisiana Farm and Ranch and are also posted at http://www.lsuagcenter.com. J. M. Beuzelin, M. O. Way, T. E. Reagan, M. J. Stout, N. A. Hummel, and J. K. Saichuk: Early Management Considerations for Mexican Rice Borer in Louisiana Rice: Click here to read the article.

On another note, we wrote a couple of articles for the latest edition of Louisiana Agriculture magazine on rice water weevil management and rice/crawfish crop rotations.  Click here to read the rice/crawfish article  and here for the rice water weevil management article.

I hope your season is wrapping up nicely.

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I apologize that I haven’t written in a while. We are moving into grant-writing “season”. We are writing a few proposals that address new rice pest problems. You’ll hear more about those projects if they are funded. Just a quick update on the latest news.

We continue to receive reports of rice stink bugs in second crop rice, in some cases with very severe pressure. You can read about this by clicking here. I also received a call today asking what the Re-entry interval for Tenchu 20SG is. The answer is 12 hours – so this means you can safely enter the field 12 hours after the insecticide application.

We have also had some reports of armyworms in crawfish rice – this is in the Evangeline Parish area. Remember that the only thing registered is BT type products, which are really only effective controlling smaller caterpillars. Any other insecticides have the possibility of killing crawfish stocked in the pond.

The LSU AgCenter Extension Entomology program has a couple of trainings this month.

Next week we have the annual advanced entomology training at the Rice Research Station in Crowley on Tuesday, Sept 13 from 9 am to noon. I hope you can join us. I’ll start off by talking about early season pest problems (chinch bugs, bill bugs, sugarcane beetles, etc.). Then we will spend the rest of the training talking about Mexican rice borer management recommendations. Click here for a link to the agenda. We will have three speakers. Speakers will include Mo Way from Texas A&M AgriLife. Mo has studied the MRB for more than 20 years and has graciously agreed to share his insights with us. Dr. Julien Beuzelin (recent graduate of LSU) will talk about his research studying the biology, behavior and secondary host plants (weeds) of MRB. Finally, I will give a presentation on management recommendations and opportunities for cooperators to help us expand the pheromone trapping program. We will have plenty of time for questions from the audience.

Later this month, Gene Reagan and Mo Way are co-hosting their annual MRB site visit in Beaumont, Texas on September 27 to 28, 2011. This is an excellent opportunity to gain first-hand experience scouting for MRB in the field. You will also have the opportunity to learn about the latest research on this pest.

If you are using social media, you are welcome to join the LSU AgCenter Rice Entomology Facebook group page. This is a great place to keep up to date on the latest observations from the field and to share your knowledge with others. Click here to join the group. If you don’t have a Facebook account, you’ll need to create an account first and then request to join the group.

I look forward to seeing many of you at the meetings this month.

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I put on my rubber gloves and slipped back into the role of insect physiologist for about an hour today.  A graduate student that Mike and I are co-advising is doing some research on the effect of rice insecticides on crawfish.  Srinivas is recording mortality in the field (at the rice station in Crowley).  Hes is also studying the effect of insecticides on the crawfish internal organs.  We had a little dissection lesson today.  Wow, dissecting a crawfish is so much easier than my USDA job where I dissected the brains out of ticks.  The large size of the crawfish makes this job pretty easy.  The ticks I used to dissect, all day long, were smaller than the eye of this crawfish. 

The inside view of a crawfish, before it is boiled.

Interestingly, that orange-yellow structure (that I always thought was fat body) is the tasty part if you like to “suck the head” when eating crawfish.  In fact, that is not fat body, but is called the hepatopancreas.  If you’d like me to label the rest of the structures, send me a message and I’ll add the labels.

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