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Posts Tagged ‘MRB’

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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UPDATE:

The training was video-recorded and the streaming video has now been posted online. Click here to view part 1. Click here to view part 2.

ORIGINAL POST:

The advanced rice entomology training is back by popular demand. I had initially hoped to focus this training on the diversity of insects that occur in a rice field (pest, beneficial, and just plain interesting aquatic insects). Unfortunately, the continued movement of the Mexican rice borer (MRB) into rice country is an important issue which trumps the aquatic entomology focus for this year. The LSU AgCenter is currently developing management recommendations and an educational program on the MRB. This information will be discussed at the training.

Below is the agenda for the training and some tentative speakers:

Date: September 13, 2011

Time: 9 am to noon with lunch served

Location: LSU AgCenter Rice Research Station Auditorium in the main building

9 am to 9:15 – registration

9:15-9:30 – welcome and purpose of training

9:30-10 – Secondary Pest Problems – early season issues and late-season stink bug management (Hummel)

10-10:30 – Mexican rice borer identification and host preferences (Speaker TBA)

10:30 – break

10:45 – 11 – Mexican rice borer insecticide management strategies (Speaker TBA)

11-11:30 – MRB management recommendations and monitoring strategies (Hummel)

11:30 – Discussion/questions

Noon – Sponsored lunch – provided by Toby McCown (Dupont), Josh Zaunbrecher (Syngenta) and John Bordlee (Valent)

This training will not be available to attend remotely, but it will be recorded for viewing at a later date.

This training will qualify for CCA CEU credits.

I hope to see you at the meeting.

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The Mexican rice borer (MRB) has now been found near Lake Charles, LA.  This link will take you to an LSU AgCenter press release that provides the latest update: http://www.lsuagcenter.com/news_archive/2011/may/headline_news/Mexican-rice-borer-advances-in-La.htm

Fortunately, LSU AgCenter Professor Gene Reagan has conducted intensive research on this pest for the past ten years, and we are prepared with management options in hand and ready to use as needed.  He has provided an Agent training in Texas for a number of years.  Following is a link to a blog posting about the most recent site visit.  Within the blog you will find a link to the handout, which contains information on recent management recommendations:

https://louisianariceinsects.wordpress.com/2010/10/01/lsu-agcenter-mexican-rice-borer-site-visit-beaumont-tx/

It is important that you learn to identify this pest, and distinguish it from other borers that can be found in rice or cane. You can study up on the pest by downloading these two LSU AgCenter numbered pubs:

This publication includes images of SCB and MRB for comparison:

http://www.lsuagcenter.com/en/communications/publications/Publications+Catalog/Crops+and+Livestock/Rice/Rice+Pests+of+Louisiana.htm

This publication provides images of MRB:

http://www.lsuagcenter.com/en/communications/publications/Publications+Catalog/Crops+and+Livestock/Rice/Mexican+Rice+Borer+Identification+Card.htm

Following is a Louisiana Agriculture article that includes the latest information on MRB research that has been generated by Dr. Reagan’s lab:

http://www.lsuagcenter.com/en/communications/publications/agmag/Archive/2010/fall/Advanced-Management-Research-and-the-Mexican-Rice-Borer.htm

In sugarcane, there are a number of recommended management practices to prevent injury from MRB.

In rice, the seed treatment Dermacor X-100 should provide control of this pest. Pyrethroids can also be used, but timing of application is critical. It is necessary to detect an infestation when larvae are still feeding in the sheath area. Once the larvae penetrate the stem, pyrethroid insecticides will not provide acceptable control because they are not able to come into contact with the larva.

If you find a larvae in rice or cane and suspect that it is MRB, please call me and we can arrange to pick up the sample.

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