Sampling Program for the Twospotted Spider Mite (Acari: Tetranychidae) in Peanut

Abstract
Utilizing data collected over 2 years, a sampling program for twospotted spider mites, Tetranychus urticae Koch, in peanuts was developed around an action threshold and was designed to be integrated into current peanut scouting programs directed against other insects, weeds, and pathogens. Three leaves per row-meter were found to be the most efficient sample size per site. To simplify sampling and to reduce sampling time, a procedure based on the frequency of occurrence of sample counts was devised where no more than five adult mites have to be counted at any site. By reducing sampling time, it becomes practical to sample at more sites, which increases the reliability of mite density estimates.

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