EFFICACY OF SELECTED INSECTICIDES FOR CONTROL OF COTTON APHID (APHIS GOSSYPII) AND BANDEDWINGED WHITEFLY (TRIALEURODES ABUTILONEA) IN COTTON -- 2005

摘要

Field experiments were conducted in 2005 at a single location in Arkansas to evaluate efficacy of selected insecticides to control the cotton aphid (Aphis gossypii). At 3 DAT, Intruder (acetamiprid) at 0.0175 lb ai/a + Dyne-amic (non-ionic spray adjuvant) at 1 pt/a, Intruder (acetamiprid) at 0.025 lb ai/a + Dyne-amic (non-ionic spray adjuvant) at 1 pt/a, Centric (thiamethoxam) at 0.031 lb ai/a, Trimax (imidachloprid) at 0.047 lb ai/a, Trimax (imidachloprid) at 0.031 lb ai/a, and Carbine (flonicamid)at 0.06 lb ai/a + Mustang Max (zeta-cypermethrin) at 0.02 lb ai/a all significantly differed from the untreated check. Of these treatments, Intruder (acetamiprid) at 0.0175 lb ai/a + Dyne-amic (non-ionic spray adjuvant) at 1 pt/a and Intruder (acetamiprid) at 0.025 lb ai/a + Dyne-amic (non-ionic spray adjuvant) at 1 pt/a were numerically the best treatments, but they did not significantly differ from the other treatments which were significantly different from the untreated check. Field experiments wereconducted in 2005 at a single location in Arkansas to evaluate efficacy of selected insecticides to control the bandedwinged whitefly (Trialeurodes abutilonea). At 3 DAT, Intruder (acetamiprid) at 0.04375 lb ai/a, Experimental 1, Experimental 2, Orthene(acephate) at 1 lb ai/a, and Centric (thiamthoxam) at 0.05 lb ai/a all significantly differed from the untreated check. Of these treatments, Orthene (acephate) at 1 lb ai/a was numerically the best treatment, but it did not significantly from the othertreatments, which were significantly different from the untreated check except for Experimental 1. At 7 DAT, no treatments significantly differed from the untreated check. For seasonal totals of whiteflies, all treatments significantly differed from theuntreated check except Capture (bifentrhin) at 0.0782 lb ai/a. Orthene (acephate) at 1 lb ai/a was significantly better than all other treatments except Intruder (acetamiprid) at 0.04375 lb ai/a.