树冠农药喷雾防治黄连木种子小蜂研究

Study on the Control of Eurytoma plotnikoui Nikolskaya by Spray Different Pesticide on the Crown of P. chinensis

应用3%啶虫脒乳油等5种低毒农药,采用树冠喷雾的方式开展黄连木种子小蜂防治试验。结果表明:适宜浓度下,五种低毒农药在树冠喷雾中对黄连木种子小蜂防治效果都在90%以上;3%啶虫脒乳油、5%吡虫啉乳油、20%乙酰甲胺磷乳油、2.5%溴氰菊酯乳油、10%氯氰菊酯乳油五种农药防治黄连木种子小蜂最佳适宜浓度分别为1 000倍、1 200倍、600倍、1 000倍、800倍;防治的最佳时期为6月上中旬。

The paper studies the effects of 5 different pesticides on the P. chinensis by crown spray. The 5 pesticides are acetamiprid（3%）, imidacloprid（5%）, acephate（20%）, Decamethrin （2.5） and Cypermethrin （1096）. The result shows that the best diluting rate of the 5 pesticides are 1000, 1200, 600, 1000 and 800. The most effective period is early July .