南瓜饲养榕树粉蚧的发育历期与生物学特征初报

榕树粉蚧是一种重要的入侵害虫,对果蔬和园林植物存在巨大的潜在威胁。为满足开展检疫处理、防控、生物学和生理学等研究的需要,本研究以南瓜为饲养材料,在室温条件下(26±1℃,RH 65%±5%)观察榕树粉蚧的生物学特性与发育历期。结果表明,榕树粉蚧具有典型的雌雄二型现象。雄虫主要经历卵、12龄若虫、预蛹、蛹、雄成虫阶段;雌虫经历卵、13龄若虫、雌成虫(产卵前期、产卵期)阶段,其发育历期(mean±SE)分别为8.51±0.03 d、9.79±0.09 d、7.46±0.10 d、6.52±0.11 d、12.13±0.11 d、8.16±0.11 d,世代发育历期54.4±0.25 d。雌成虫产卵量483651粒,平均550.87±51.07粒,卵期711 d,孵化率95.19%±0.75%。该研究结果表明榕树粉蚧繁殖能力强,应高度重视其防控工作。

Primary study on developmental timetable and biological characteristics of aerial root mealybug(Hemiptera:Pseudococcidae)fed on pumpkin

Aerial root mealybug,Pseudococcus baliteus Lit,is an important invasive pest,which poses a potential threat to fruits,vegetables,and ornamental plants.In order to meet the needs for researches on its phytosanitary treatment,control,biology and physiology,the mealybugs were reared with pumpkin fruits under room temperature(26±1℃,RH 65%±5%),then,the biological characteristics and developmental timetable were observed.The mealybugs showed a clear sexual dimorphism between sexes.The male P.baliteus have six stages(egg,1st and 2nd instar nymph,prepupa,pupa and adult).Whereas female have five stages(egg,1st,2nd and 3rd instar nymph and adult),their developmental time were 8.51±0.03 d,9.79±0.09 d,7.46±0.10 d,6.52±0.11 d,12.13±0.11 d(pre-oviposition),and 8.16±0.11 d(oviposition),respectively;and the generation period was 54.4±0.25 d.The number of eggs laid per female was 483-651 with an average of550.87±51.07,which hatched 7-11 d after laying with the hatching rate of 95.19%±0.75%.It shows that the aerial root mealybug has a strong ability to reproduce,as a result,more attention should be paid to the pest for prevention and control.