Comparative Activity of Registered and Experimental Miticides to Control Twospotted Spider Mite Tetranychm urticae Koch (Acari: Tetranychidae) in Plant City Area Strawberry

摘要

Twospotted spider mite (Tetranychus urticae Koch) management in strawberry (Fragaria xananassa Duchesne) was evaluated in two field experiments during 2007 that measured effectiveness of various miticides, a non-ionic surfactant, and their frequency of application. Miticides evaluated included two formulations of abamectin [abamectin A (Agri-Mek~(R) 0,15 EC) and abamectin B (Zoro~(R) 0.15 EC)], and single formulations of bifenazate, essential oil of Chenopodium ambrosioides L., hexythiazox, and spiromesifen. All of the miticides provided significant reductions in motile form spider mites. Three weeks after initial application of treatments, the most effective reductions in motile forms occurred when abamectin, bifenazate, hexythiazox, or spiromesifen were used. Most miticides reduced numbers of mite eggs; however, ovicidal hexythiazox did not because treated eggs failed to hatch.