Abstract: To screen biogenic pesticides in controlling aphids on peach tree, the field test was carried out using 1.5% pyrethrin aqueous solution (AS), 0.3% matrine AS and 5% eucalyptole soluble concentrate against aphids in the field. The results indicated that of the three biogenic pesticides, 0.3% matrine AS was the most effective. The control efficiency could reach 70.12% on the first day and 91.96% on the 7th day respectively after spraying. Comparing with 70% imidacloprid water dispersible granule, the control effects of 0.5% matrine AS were not significantly different. Matrine AS was well quick-acting and persistance on the control of aphids. The matrine AS was safe to peach tree, and was ideal pesticide to control aphids. The 1 000 dilution of 0.3% matrine AS was suggested to be applied in the fields.

Key words: biogenic pesticides, peach aphids, control efficiency

摘要： 为筛选生产上防治桃树蚜虫的生物源农药，开展了1.5%除虫菊素水剂、0.3%苦参碱水剂和5%桉油精可溶液剂对桃树蚜虫的田间防效试验。结果表明，3种生物源农药中以0.3%苦参碱水剂防治效果最好，药后1 d防效为70.12%，药后7 d防效为91.96%，与对照药剂70% 吡虫啉水分散粒剂防效相当，具有较好的速效性和持效性。苦参碱对桃树安全，是防治桃蚜的理想药剂，生产上推荐使用浓度为1 000倍液。

关键词: 生物源农药, 桃蚜, 防效