天竺桂佛州龟蜡蚧生物学特性观察

佛州龟蜡蚧Ceroplastes floridensis Comstock是严重危害天竺桂Cinnamomum japonicum的重要害虫。该虫在福建尤溪1 a发生2代,以第2代孕卵雌成虫越冬,少量以未孕卵雌成虫和3龄若虫越冬。第1代雌虫产卵、孵化盛期分别为8月上旬和8月下旬;第2代雌虫产卵、孵化盛期分别为4月中旬和5月上、中旬。孤雌生殖。第1,2代雌虫平均产卵量分别为222.8,145.6粒,卵平均孵化率为93.8%和95.5%。1龄若虫期和成虫孕卵前期是防治的有利时机,防治的最适时间为每年的5月中旬,最迟不超过7月中旬。

Bionomics of Ceroplastes floridensis in Cinnamomum japonicum

Ceroplastes floridensis was a serious pest in Cinnamomum japonicum.It had two generations a year in Youxi,Fujian Province.Most of them overwintered as the gestated female adults of the second generation and only a few overwintered as ungestated female adults and the nymphs in the third instar.The peaks of oviposition and egg-hatching of the first generation were in the first and last ten-days of August,and those of the second generation were in mid April and the first twenty-days of May.They were parthenoge...