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Archive for February, 2012

Our society has become increasingly mobile and access to the internet is improving rapidly, even in rural regions of Louisiana. Agricultural industries are reliant, more than ever before, on the internet to access critical, timely information to guide crop management decision. The LSU AgCenter has led the land grant university system in developing a comprehensive website that we use to distribute research-baesd information to rice producers. The design of our website continues to improve over time in response to feedback from our clientele.

After many long days spent in front of a computer screen we have completed a drastic revision of the layout and content of the LSU AgCenter Rice Insect Website. The new website has a simple layout with an easy to use menu at the homepage that will point you to all the resources you need to make pest management decisions in your crop. Click here for the new LSU AgCenter rice insect home page.

At the new home page you will find links to the following resources:

We are still developing some of the content. Soon you will also be able to access the following topics:
  • Demonstration tests (all the data and information on our demos over the past few years)
  • Meetings (Oral and poster presentations)
  • Rice Pest Management Guide and Insecticide links
  • Rice Extension publications

The inspiration for our redesign came from the LSU AgCenter Rice Disease website redesign. Now that the page is launched, we need your help. Please email (nhummel@agcenter.lsu.edu) or comment here with any additional improvements we can make to our content. We will continue to revise the website based on your feedback.

Special thanks to Anna Meszaros, Lisa West and Nicholas Colligan for redesigning our website. I think you’ll be pleased with the new layout. If you are attending RTWG this week, look for a poster display by Anna that will introduce you to our new website.

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This article was originally published in Louisiana Farm and Ranch, February 2012. I’m reposting it here for your information. This is an important article to read as growers are making their decision about insecticide seed treatments in rice for the 2012 season.

Authors: Natalie Hummel, Associate Professor and Assistant to the Director & Mike Stout, Professor

We have had quite a few inquiries about using a combination of seed treatments, neonicotinoid and Dermacor X-100, in rice. While this practice is legal, using more than one seed treatment is not a practice that we encourage in most circumstances because it results in more insecticide use in rice production than may be necessary.

The rice industry is considering one of these combinations of seed treatments: 1) Dermacor X-100 and CruiserMaxx or 2) Dermacor X-100 and NipsitINSIDE. Typically, a combination of seed treatments is only being considered when planting rice at low seeding rates, primarily because of concerns about the lack of efficacy of CruiserMaxx and NipsitINSIDE at hybrid seeding rates (25 lbs/acre or less) that we have observed in our rice water weevil demonstration trials and small plot trials. The second scenario is where Dermacor X-100 is being used for rice water weevil management and there is a history of stand reduction because of a sporadic pest infestation, usually chinch bugs or armyworms. Combining seed treatments provides a benefit of protecting the crop from injury by some primary and sporadic crop pests.

As the rice industry moves toward a more sustainable crop production profile, the LSU AgCenter strongly encourages rice producers to be good stewards of these insecticide seed treatments. Stewardship of these seed treatments means avoiding the use of insecticides not needed in the crop. For this reason, we discourage the widespread use of a combination of insecticide seed treatments in rice. We instead encourage the person making the seed treatment decision to consider the spectrum of pests that each insecticide can control, the seeding rate, and the history of crop pests in that field.

It is important to remember that each of the seed treatments controls a different group of insects. Dermacor X-100 belongs to a class of insecticides called anthranilic diamides, which target a specific receptor in the muscle of the insect. Dermacor X-100 is registered to control rice water weevil larvae, borers (Mexican rice borer, Rice stalk borer, Sugarcane borer), armyworms and colaspis (2ee registration for suppression). CruiserMaxx and NipsitINSIDE are both neonicotinoid insecticides that affect the nervous system of target insects. CruiserMaxx is labeled to control rice water weevils (larvae and adults), chinch bugs, colaspis and thrips. NipsitINSIDE is labeled to control rice water weevils and colaspis. We do not have data to support the ability of CruiserMaxx or NipsitINSIDE to control chinch bugs, colaspis or thrips in Louisiana, but we anticipate that they will control these pests based on observations from other crops and from rice in other parts of the world. As you study these seed treatments, you can see how a combination of these products can control most of the insects that attack rice in Louisiana. This is part of the reason why there is an inclination toward using a combination of treatments.

Here are criteria for you to consider as you make your seed treatment decision. The first is the seeding rate. This needs to be considered because neonicotinoids don’t always provide good control of rice water weevils at low seeding rates. Dermacor X-100 does provide control of rice water weevils at all seeding rates, but it will not control chinch bugs or thrips. According to the chemical manufacturers, neonicotinoids do control other early season pests including chinch bugs, thrips and colaspis. Another challenge at low seeding rates is that the plant stand is thin and is less tolerant to any insects that reduce the stand by killing seedlings. Insects that can reduce the plant stand count include armyworms, chinch bugs, colaspis and thrips. Borers can infest fields after the plant is at the green ring growth stage and reduce yields by causing deadhearts and whiteheads. Remember that if you put out a combination of seed treatments for a sporadic pest and that pest doesn’t infest your field, then you didn’t need to use a combination of seed treatments. We have data that indicate that rice water weevils infest more than 90% of rice fields in Louisiana. This justifies the use of a seed treatment to control rice water weevils as part of a good IPM program. That is not the case for many of our sporadic pests (armyworms, chinch bugs, colaspis, borers, etc.), which rarely occur at levels that justify treatment. Also, keep in mind that we rarely recommend an insecticide treatment for thrips in rice; usually the damage is not severe enough to require an insecticide.

Here are a couple of situations where a combination of seed treatments may be a good management decision. If you are planting rice at a low seeding rate and you anticipate that you will have an infestation of chinch bugs that would justify a pyrethroid treatment, then a combination of seed treatments would be a good option. In this situation, you would be using Dermacor X-100 to control rice water weevils, borers and armyworms and adding a neonicotinoid to control chinch bugs or thrips. Also, if you are planting rice at conventional seeding rates and you are using a neonicotinoid seed treatment to control rice water weevils and colaspis, but you typically have problems with armyworms or borers, then you may want to apply Dermacor X-100 to your seed.

There is one more thing to consider as you make your seed treatment decisions for the 2012 season. The EPA recently approved a Section 24C (special local need) registration for use of Dermacor X-100 in water-seeded rice. If you are interested in this option, a certified seed treater can provide more information. Remember that you CANNOT use the other seed treatments (CruiserMaxx or NipsitINSIDE) in water-seeded rice. The use of CruiserMaxx and NipsitINSIDE in water-seeded rice is illegal and will not provide control of the target pests.

If you have any questions about the seed treatment options registered for use in rice, please contact your local County Agent, or Natalie Hummel (nhummel@agcenter.lsu.edu) for more information.

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The Rice Technical Working Group meeting will be held in Hot Springs, Arkansas next week. This meeting happens every two years and is a unique opportunity to meet with rice research and extension faculty from across the world. LSU AgCenter Research and Extension Faculty will present more than a dozen talks at the conference. There will be about 10 talks from the rice entomology program alone. Also, Dr. Mo Way and I will give a presentation in the Ag Consultants training on Monday afternoon.

You can find the meeting details and program here: http://rtwg.aristotle.net/

Following, I have posted the program for the Certified Crop Advisor Training which will be held on Monday, February 27, 2012.

Certified Crop Advisor Training Session at 34th Annual Rice Technical Working Group

When: Monday February 27th from 1-5 pm

Where: Embassy Suites Hotel, Hot Springs, AR

Contact: Trent Roberts 479-575-6752 tlrobert@uark.edu

Registration: $125.00 onsite for CCA training only beginning at 11:00 am

Program Agenda

1:00 Arkansas Discovery Farm

Dr. Mike Daniels, University of Arkansas

1:30 Life on the Edge: Nutrient Management Using Drainage Ditches

Dr. Robbie Kroger, Mississippi State University

2:00 Multi-pest Management in Southern Rice and Introduction to the RiceScout Mobile App

Dr. Natalie Hummel, LSU AgCenter

Dr. MO Way, Texas Agrilife Research and Extension

2:30 Current Rice Fertility Research and Trends

Dr. Dustin Harrell, Louisiana State University Dr. Tim Walker, Mississippi State University

3:00-3:20 Break

3:20 Fertilizer Management Options to Mitigate Greenhouse Gas Emissions in Rice Systems

Dr. Bruce Linquist, University of California Davis

3:50 Rice Bacterial Panicle Blight and its Potential Management- Panel Discussion

Dr. Jong Ham, Louisiana State University

Dr. Yeshi Wamishe, University of Arkansas

Dr. Don Groth, Louisiana State University

Dr. Xin-gen (Shane) Zhou, Texas Agrilife Research and Extension

4:30 Potential for Future Significant Gains in Rice Productivity

Dr. Steve Linscombe, Louisiana State University

Approved CEU Credits

Soil and Water Management 1.5, Pest Management 1.0, Nutrient Management 1.0, Crop Management 0.5: Total Credit 4.0

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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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If you produced a rice crop last season, or advised on pest management of a US rice crop, please complete our online survey.

The purpose of this survey is to evaluate current management programs for rice insects. Your responses are used to guide future programs and support registration of insecticides. Please answer all questions as honestly as possible. Individual answers will be kept confidential. You can remain anonymous if you prefer. If you already completed a paper version of this survey this year at your winter production meeting, you don’t need to complete it again. If you have any questions, please contact Natalie Hummel at 225-223-3373 or nhummel@agcenter.lsu.edu. We would appreciate your response by February 8.

Click on this link to complete the survey:

http://www.zoomerang.com/Survey/WEB22EMCGNZ47M

Summary reports from the 2009 survey can be found here.

 

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