The efficacy of two synergistic mixtures isoprocarb·abamectin and profenophos·abamectin to Spodoptera exigua Hübner

Through field trials, the efficacy of two synergistic mixtures, isoprocarb + abamectin 24% EC and profenophos + abamectin 35% EC, to Spodoptera exigua Hubner larvae were assayed in Qingzhou, Shandong Province in 2002 The effects of isoprocarb + abamectin 24% EC were significantly better than that of isoprocarb 25% EC and abamectin 1 8% EC. In the application rate of 50 g/667m 2 the correct mortality isoprocarb + abamectin 24% EC after 3, 7, 10 days were 82 38%, 87 49% and 88 90% respectively; in 37 5 g/667m 2 , the corresponded control effects were 78 21%, 83 97% and 85 24% respectively. The correct mortality of profenophos·abamectin 35% EC in the application rate of 50 g/667m 2 after 3, 7, 10 days were 86 15%, 91 37% and 91 32% respectively; in 37 5 g/667m 2, the corresponded control effects were 80 73%, 87 40% and 88 39% respectively. This synergistic mixture possessed a quick action, good residual performance and relatively low cost guarantee for the good control effect in the field.