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CONTROL OF GRAPE COLASPIS AND RICE WATER WEEVIL BY SELECTED SEED TREATMENTS IN ARKANSAS RICE

Applied Research

Craig Allen
CEA - AGRI Staff Chairman
University of Arkansas
HARRISBURG

Abstract

\r\n With the loss of Icon Seed treatment for use in rice, farmers have had few options for control of two of the major pests in Arkansas rice culture.  It has been a struggle for rice producers in Poinsett County and surrounding areas to deal with grape colaspis and rice water weevil.  Grape colaspis is especially detrimental to rice seedlings and causes stand loss especially under adverse environmental conditions. The larvae stage of these insects feed on the plants causing root pruning and girdling resulting in plant death.  In conjunction with the Extension Entomologist a protocol was developed for on-farm testing to evaluate the efficacy of three new seed treatments aimed at controlling these two pests.  Replicated trials were established in grower fields in Poinsett County during the 2008, 2009 and 2010 growing seasons.  These fields had a history of reduced stands and yield loss caused by these pests.  The three seed treatments evaluated were Dermacor, Cruiser and Nipsit Inside.  University of Arkansas recommendations for fertility and crop management were utilized in all trials.  Control ratings were taken at standardized timings.  Results of these studies indicated differences among treatments, including increased stand counts, plant height and enhanced seedling vigor.  Core samples indicated a reduction in insect numbers.  Yield increases of 8-10 bushels per acre were also common.  Further results of these studies will be presented to fellow agents and producers.

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Poster has NOT been presented at any previous NACAA AM/PIC

This poster is being submitted for judging. It will be displayed at the AM/PIC if not selected as a State winner. The abstract will be published in the proceedings.

A poster file has not been provided

Authors: A. Craig, J Fortner, G Lorenz, N Taillon
  1. Craig, A. County Extension Agent- Agriculture, University Of Arkansas Division of Agriculture, Arkansas, 72432
  2. Fortner, J. Program Associate, University Of Arkansas Division of Agriculture, Arkansas, 72086
  3. Lorenz, G. Extension Entomologist, University Of Arkansas Division of Agriculture, Arkansas, 72086
  4. Taillon, N. Program Associate, University Of Arkansas Division of Agriculture, Arkansas, 72086