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油菜蚤跳甲药剂防治试验 总被引:1,自引:0,他引:1
选用6种药剂,采用拌种、拌种+喷雾、喷雾3种施药方法,在甘肃省康乐县进行了双低春油菜田间油菜蚤跳甲防效比较试验,以油菜被害指数表示药剂的防治效果,选出适宜药剂与施药方法。结果表明:拌种处理中,毒死蜱被害指数最低(2~3叶期4.15%、4~5叶期20.38%、5~6叶期32.08%),氰戊8226;马拉松、甲维盐次之;拌种+喷雾处理中,氰戊8226;马拉松(1.83%、15.84%、25.16%)、甲维盐(6.20%、29.25%、29.24%)防效最佳,吡虫啉次之;喷雾处理中,氰戊8226;马拉松(5.24%、18.79%、29.17%)最佳,甲维盐、吡虫啉次之。氰戊8226;马拉松、辛硫磷、毒死蜱、甲维盐拌种、拌种+喷雾,甲维盐喷雾将最终死苗率控制在5%以内,大田示范试验中被害指数控制在40%以内,有效控制了对油菜的为害。由此,可以用毒死蜱、氰戊8226;马拉松、甲维盐、吡虫啉替代高毒农药甲拌磷防治油菜蚤跳甲。其中吡虫啉、甲维盐适宜喷雾,毒死蜱适宜拌种,氰戊8226;马拉松拌种或喷雾均适宜。 相似文献
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A commercially acceptable assessment technique for improved control of cabbage stem flea beetle feeding on winter oilseed rape 总被引:1,自引:0,他引:1
Highly significant relationships between the percentage of leaves showing Psylliodes chrysocephala (L.) feeding scars and the mean number of larvae per plant during autumn, were established from 457 fields (over five different years) in England and Wales, and used to define an index of leaf scarring as an alternative assessment method for control decisions. The index was tested in conjunction with autumn samples using datasets from 786 fields (six years). An action threshold of 50% leaves scarred resulted in similar treatment advice to the current plant dissection method in over 98% of cases. During spring, the relationship between percentage leaves scarred and mean number of larvae per plant was not consistent between years and the index cannot be used for population assessment at this time of year. 相似文献
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油菜蚤跳甲的为害分级及习性 总被引:4,自引:0,他引:4
在甘肃临夏县调查发现,春季油菜蚤跳甲的越冬成虫可潜藏在杨树的老翘皮下、地边土缝及田间表土中蛰伏。田间为害春油菜幼苗的成虫量随当时的气温而变化。田间成虫数量的调查结果往往不能代表实际的危害状况。通过对被害苗的详细调查归类,本文提出了油菜蚤跳甲为害的分级标准,建议以被害指数来表示该虫的危害程度,以便在综合防治中能准确的表示虫情。 相似文献
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