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杧果在近年有较大面积种植,但其嫩梢及花蕾受到杧果横线尾夜蛾幼虫的严重为害,连成芒果减产。为此,采用3种拟除虫菊酯类杀虫剂及具有内吸性的呋喃丹进行防治试验,其结果:1.2.5％溴氰菊酯5000倍液、20％杀灭菊酯7 500倍液,20％马氰菊酯2 000倍和3 000倍液对该虫的防治效果都好,均极显著优于呋喃丹;2.2.5％溴氰菊酯7 500倍液的效果也好,显著优于呋喃丹;3.20％杀灭菊酯5 000倍液和两种用量的呋喃丹的效果不好。20％杀灭菊酯5 000倍液的效果反而比7 500倍液差,原因有待研究。
Mangosteen has been planted in large area in recent years, but its young shoots and buds are severely damaged by the larvae of Spodoptera frugiperda and even cut into the mango. To this end, the use of three kinds of pyrethroid insecticides and internal absorption of carbofuran control test results: 1.2.5% deltamethrin 5000 times, 20% fenvalerate 7 500 times , 20% 2 000 times of cypermethrin and 3,000 times of the control effect of the insect are good, were significantly better than carbofuran; 2.2.5% Deltamethrin 7 500 times the effect is also good, significant Better than carbofuran; 3.20% fenvalerate 5 000 times and two doses of carbofuran ineffective. 20% fenvalerate 5 000 times the effect instead of 7 500 times the liquid difference, the reason to be studied.