Biological characteristics of apple codling moth(Cydia pomonella L.)larvae and its harmful habits on walnut fruit
[Objective]The codling moth(Cydia Pomonella L.)is an important quarantine pest in Chi-na.In 2018,it was found to harm walnut fruits in Hotan area of Xinjiang,which was the first report in Chi-na.This project aims to clarify the harmful habit of the larval host of Cydia pomonella transferred to walnut.[Methods]The fruit eating habits of larvae were observed in Hotan County for two consecutive years.[Re-sults]The results showed that the translucent color of the eggs gradually deepened after the initial produc-tion.After the eggs were fully developed,the larvae chewed through the egg shell and crawled out without feed-ing on the egg shell.On the blade hatched larvae,the young period(1-3 instar)transferred to the fruit after feeding blade,larvae damage of walnut fruit,the epicarp irregular way to nucleoli moth corrupteth into the cavity,1 generation larvae in 4 age began to turn,the second generation in the late age of 3 began to turn fruit,after continuous outer peel and repeatedly turn fruit,after the completion of the larval development to take off the fruit,The larvae migrated from top to bottom and formed cocoons and pupated within 60-120 cm of the trunk,and diapause was observed.[Conclusion]In conclusion,there were six instars of codling moth.Larvae of different generations and instars had different damage habits,and their damage habits were af-fected by egg position,larval instar and fruit development.
Cydia pomonellawalnut fruithazard habitpupation place
万方数据
维普
