50％灭幼脲3号胶悬剂的研制与应用

STUDY ON 50 SUSPENSION CONCENTRATE OF BENZOPHENOL UREA No. 3

摘要:

经筛选确定了50％灭幼脲3号胶悬剂的最佳配方是:原药50％,增稠剂1—1.5％,扩散剂0.5—1.0％,乳化剂2.5 — 3.0 ％,防冻剂5.0％。田间试验表明,经热贮存两周与新加工的50％灭幼脲3号胶悬剂施药量150克/公顷(有效成分)防治粘虫(Mythimna separat walker)幼虫效果很好,无显著性差异,二者的残效期与25％灭幼脲3号胶悬剂残效期都在20天以上,且对捕食性天敌如蜘蛛、瓢虫、食蚜蝇基本无影响。

Abstract:

The Componente rate of 50% suspension concentrate of Benzophenol Urea No.3(BU.3) was showed as follows:50%BU. 3, 1-1.5% thicking agent, 0.5-1.9% dispersing agent, 3.0% emulsifier, 5.0% antifreeze. The results of feild test indicated that the effect of application of BU.3 at rate 150g/ha(ai) to Control larvae of Armyworm (Mythimna separata walker) was excellent. The toxicity of BU.3 was no significant to several natural enemies.