女贞天蛾生物学特性的初步观察

女贞天蛾(Kentrochrysalis streckeristaudinger)是女贞、桂花的重要害虫之一。该虫在福建南平1 a发生4代,以蛹在土壤中越冬。竖年3月下旬~4月上旬成虫开始羽化,4月中下旬为羽化盛期,第1代幼虫4月中旬孵出,5月中旬结茧,5月下旬成虫羽化;第2、第3、第4代幼虫分别在6月上旬、7月上旬、8月中下旬孵化,第4代幼虫9月中旬结茧化蛹进入越冬状态。该虫取食女贞叶部,轻者使叶片畸形,重者可将植株叶片食光,使枝梢枯死。可用人工捕杀幼虫,冬季浅翻消灭越冬蛹,以及灯光诱杀成虫等防治措施,控制害虫的爆发危害。

Primarily Observing Kentrochrysalis streckeri Biological Characteristics

Kentrochrysalis streckeri was the important injurious insect for privet and sweet-scented osmanthus.The insect occurred for 4 generations in Nanping,Fujian every year,it overwintered by pupa in soil.The adult eclosion began in the last 10 days of Mar.～the first 10 days of Apr.,the next year,the last 20 days of Apr.was the eclosion peak period,the first generation of larva hatched out in the mid 10 days of Apr.,produced cocoon in May,the adult eclosion began in the last 10 days of May;the second,third,and fourth generations of larvae began in the first 10 days of Jun.,in the first 10 days of July,in the last 20 days of Agu.,respectively,the fourth generation of larva produced cocoon and pupa and was in the overwintering status in the mid 10 days of Sep.The insect took the leaf part of privet for food,it made the leaf abnormal in a light degree,ate the plant leaf out in a certain degree,which made the branch and tip dry to death.The control measures of artificially killing the larva,killing overwintering pupa by shallow tillage in winter,and inducing and killing the adult by light might be used to control damage insect outbreak damage.