天花井国家森林公园银杏大蚕蛾虫害发生规律初报

通过室内饲养和室外观察相结合的方式，研究天花井国家森林公园银杏大蚕蛾虫害的发生规律和特点。结果表明 (1）银杏大蚕蛾在天花井国家森林公园每年发生一次，以卵越冬；（2）室内饲养的银杏大蚕蛾五龄幼虫平均体长比室外幼虫小5毫米，室内蚕茧颜色为浅白绿色，而室外蚕茧为褐色至黑色。(3）室内饲养的银杏大蚕蛾的生活史与室外飞蛾基本相同，3月下旬至4月上旬开始孵化，4～5龄时摄食量最大，成虫在6月下旬至9月下旬羽化。最好的防治时间是在第三龄幼虫之前。

Preliminary report on the occurrence pattern of Dictyoploca japonica Moore pests in Tianhuajing National Forest Park

The occurrence pattern and characteristics of Dictyoploca japonica Moore moth infestation in Tianhuajing National Forest Park were studied by combining indoor rearing and outdoor observation. The results showed that: (1) Dictyoploca japonica Moore have one generation per year in the Tianhuajing National Forest Park and overwinter with eggs; (2) the average body length of the fifth instar larvae of indoor Dictyoploca japonica Moore was smaller than that of the outdoor ones by 5 mm, and the color of the indoor cocoons was light white green, while the outdoor cocoons was brown to black; (3) The life history of Dictyoploca japonica Moore reared indoors was basically the same as that outdoors, It began to hatch from late March to early April, and the feeding amount was the largest at the fourth to fifth instars, and the adults emerged from late June to late September. It is proposed that the best time for its control was before the third instar of the larvae. ]