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Efficacy of Selected Insecticides for Control of Heliothines in Arkansas, 2003

D.R. Johnson, G.M. Lorenz, III, W.H. Robertson, P.R. Smith, J. Greene, C. Capps, and D. Plunkett


Due to increasing pyrethroid resistance in the Heliothine population, cotton producers are constantly looking for more economic means of controlling these lepidopterous pests. The purpose of this experiment was to examine the effectiveness of selected insecticides and compare the efficacy of each for control of a Heliothine population with respect to traditional pyrethroids. The selected insecticides for this experiment were novaluron (Diamond®), indoxacarb (Steward®), spinosad (Tracer®), esfenvalerate (Asana XL®), lamda cyhalothrin (Karate Z®), gamma cyhalothrin (DE-225®), a bifenthrin and spinosad mix (Double Threat®) Significant differences were observed among treatments in mid to late season observations. Additional data needs to be obtained to increase overall significance. The two different application levels of bifenthrin and spinosad that were selected for this test had the highest yield increase above the untreated check area. The individual treatment of indoxacarb contained the least amount of damaged squares across four different evaluation dates with an average of 3.00.

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Document last modified 04/27/04