黔西南园林植物草履蚧生物学特性观察及药效试验

为了对黔西南地区危害园林植物的草履蚧(Drosicha corpulenta Kuwana)的防治提供参考,对草履蚧进行了生物学特性观察和药剂防治试验.该虫在黔西南1年发生1代,以卵在树干周围的土层(10 cm左右)、土缝、石缝、草堆中越冬.1月中旬卵开始孵化,3月中旬至4月上旬蜕皮,4月下旬开始出现成虫,5月中旬交配,5月下旬至8月下旬产卵.雄若虫4月上旬第2次蜕皮后化蛹,雌若虫第2次蜕皮后则继续取食,4月下旬至5月上旬第3次蜕皮成成虫.40%速扑杀乳油1 000倍液、40%氧化乐果乳油1 000倍液对草履蚧具有良好的防效,药后7 d的防效均达90%以上.

Biological Characteristics and Chemical Control of Drosicha corpulenta in Southwest Guizhou

The biological characteristics and chemical control methods of Drosicha corpulenta were studied to provide a reference for controlling Drosicha corpulenta in garden plants in Southwest Guizhou. The results show that Drosicha corpulenta occurrs one generation in a year, its eggs in the soil layer with 10 cm depth, soil crack, rock crack and haystack begin to hatch in the middle ten-day period of January, its nymphs molt from the middle ten-day period of March to the first ten-day period of April, its adults begin to emerge from the last ten-day period of April, to mate in the middle ten-day period of May and to lay eggs from the last ten-day period of May to the last ten-day period of August. The male nymphs begin to pupate in the first ten-day period of April after the second molting. The female nymphs after the second molting keep intake and turn into adults from the last ten-day period of April to the first ten-day period of May after the third molting. 40% Supraeide erflulsitlable or 40% Dimethoate emulsifier is of the good control effect on Drosicha corpulenta and its control effect is above 90% at 7d after spraying these chemical agents.