Influence of fruits of 12 walnut varieties on egg-laying selection and feeding harm by the codling moth
Codling moth is a worldwide quarantine pest,which is currently spreading in walnut parks in China with a rising trend and increasing damage.In this experiment,12 walnut varieties were used as hosts,and biological indexes such as egg drop,egg stage,egg hatching rate,larval skin-gnawing rate and larval fruit-destroying rate were obtained through egg-laying selection test and growth and development test.The results showed that the egg drop(17.33 eggs/fruit)of Xinzuo No.l was significantly higher than that of other 11 varieties,with a strong preference for adult egg-laying;The skin-gnawing rate(55.85％)of Rili was the highest,which was conducive to the growth and development of larvae;The skin-gnawing rate of 6-7 was the lowest(19.80％);The fruit-destroying rate of 7-18 was the lowest(9.77％),followed by Yuanlin(10.49％).In the comprehensive analysis,codling moth had high adaptability on two varieties,including Rili and Xinzuo No.l,and low adaptability on three varieties,including 6-7,Yuanlin,and 7-18.This research evaluated the adaptability of the codling moth on different walnut varieties,providing a theoreti-cal basis for the layout of fruit tree varieties in production and reducing the economic losses caused by the codling moth to the walnut industry.
万方数据
维普
