摘要
采取林间调查和室内饲养、观察等方法研究了核桃横沟象Dyscerus juglans Chao生物特性和受害树木解剖特征。结果表明:核桃横沟象在商洛市2a发生一代,以幼虫和成虫越冬,越冬成虫翌年3月底开始活动,6月上、中旬成虫产卵、9月份产卵结束,幼虫孵出1d后,开始在产卵孔取食树皮,随后蛀入韧皮部与木质部之间,幼虫危害期长,每年3~11月均能蛀食。
The biological characteristics of Dyscerus juglans Chao and its harm to trees were studied through investigation in forest and observation in feeding room. The result showed that Dyscerus Juglans Chao occurred one generation every two years in Shangluo, and overwintered by larva and a- dult which began movement in the end of March, spawned in early and middle of June, and finished spawning in September. Larvas begin to eat bark one day after they hatched out, and then lived in a place between phloem and xylem. The damage period caused by larvas is very long, lasting from March to November every year.
出处
《陕西林业科技》
2017年第2期53-55,共3页
Shaanxi Forest Science and Technology
关键词
核桃横沟象
生物特性
危害
防治
观察
Dyscerus juglans
biology characteristics
control
observation
