柠条豆象是危害柠条种子的主要虫害。田间对50%马拉硫磷乳油等2种杀虫剂不同浓度药剂以及不同配比防治柠条豆象的效果进行了比较。结果表明:50%马拉硫磷乳油对柠条豆象具有很好的防治效果,900倍喷雾柠条后,柠条豆象虫蚀率相比对照(10.67±0.31)%降到(5.47±0.11)%。50%马拉硫磷乳油和50%杀螟松乳油配合使用防除柠条豆象效果也很好,处理8(1200A+500B)虫蚀率为(8.93±0.18)%、处理5(900A+500B)虫蚀率为(10.00±0.23)%。生产上可推荐使用50%马拉硫磷乳油900~1200倍液搭配50%杀螟松乳油500倍液防治柠条豆象。
Kytorhinus immixtus Motschulsky was the major pests of seed of Caragana. Effects of 2 insecticides in different concentrations to control K. immixtus were compared. It showed that insect fruit rate of 50% Malathion EC was(5.47±0.11) % after 900 times spraying, compared with(10.67 ±0.31)% in CK. Control effect of different kinds of insecticides with different concentrations were also good, with insect fruit rate(8.93±0.18)% after 50% Malathion EC 1200 times and 50% Sumithion EC 500 times. Insect fruit rate of 50% Malathion EC 900 times and 50% Sumithion EC 500 times was(10.00 ±0.23)%.Using 50% Malathion EC 900~1200 times and 50% Sumithion EC 500 times together could be recommended to control K.immixtus in production.