板栗新害虫深褐拟叶螽生物学特性及发生条件的研究

目的]为探明深褐拟叶螽在板栗上的发生情况。方法]采用室内饲养与野外观察相结合的方法研究其生活史,野外调查其发生与周围环境的关系。结果]深褐拟叶螽在浙江省云和县1年发生1代,以卵在板栗直径5 cm左右的主干上越冬。成、若虫都以算盘子叶片为食,成虫产卵危害板栗幼树主干。4月上旬若虫孵化,6月下旬成虫羽化,7月中下旬产卵。结论]可采用清除算盘子等杂灌木、休眠季节小刀划卵4、月上中旬或7、8月份喷药、冬季涂干等办法进行防治。

Biological Characters and Occurrence of a New Pest Tegra novaehollandiae-viridinotata on Chestnut

Objective] The paper aimed to explore occurrence conditions of Tegra novaehollandiae-viridinotata on chestnut.Method] Life history was observed by the combination of indoor-rearing and field observation,as well as the relation between occurrence and surroundings in field.Result]T.novaehollandiae-viridinotata has one generation each year in Yunhe County,Zhejiang Province,and overwinters by laying eggs in chestnut trunk with diameter of 5 cm.Adults and the nymphs feed on Glochidion puberum leaves;adults damage trunks of young chestnut by oviposition.Nymphs hatch in first April,and adults moult in last June and lay eggs in middle July.Conclusion] T.novaehollandiae-viridinotata could be controlled by eliminating surrounding shrubs especially the G.puberum,cutting the eggs in dormancy by knife,spraying pesticides in middle April or June and July,coating stem in winter,etc.