EFFICACY OF MITICIDES FOR CONTROL OF TWOSPOTTED SPIDER MITE IN SOYBEANS, 2012

The purpose of this experiment was to examine the efficacy of foliar treatments of miticides for control of Tetranychus urticae in soybeans. The experiment was conducted at the Haskell Agricultural Laboratory in Concord, Nebraska. Experimental design was a randomized complete block with four replications. Soybean variety Pioneer P93M11 was planted on 10 May. Treatments were applied to soybean Glycine max (L.) on 7 Jun. Liquid formulated miticides were applied with a back-pack sprayer calibrated to deliver 20 gpa at 28 psi. Sampling was carried out 7, 14 and 21 DAT. Mite number was estimated on single leaflets randomly removed from 4 plants/plot. Plots were machine harvested 24 September and yields were adjusted to 13% moisture. Results were analyzed using analysis of variance procedures. Treatment means were separated using LSD procedures. Results appear in Table 1.