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Preferential feeding of an anthocorid predator Blaptostethus pallescens Poppius on different stages of cotton mealybug

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环境昆虫学报 2011年第4期33卷 423-428页

作者： Gupta Tripti National Bureau of Agriculturally Important Insects (ICAR)

Blaptostethus pallescens Poppius (Heteroptera:Anthocoridae),which is amenable to mass rearing,has proved to be a potential predator of sucking pests like mites and ***,the cotton mealybug Phenacoccus solenopsis Tinsley emerged as a serious pest on cotton in *** studies indicated that *** could feed on the cotton ***,further investigations were conducted to understand the stage of the predator which is most potential and the pest stage preferred by the *** nymphs and adults of *** could predate equally well on the neonates of cotton *** (three to four-day-old) nymphs of the predator could not feed on any stage of the cotton *** nymphs (seven-day-old and above) and adults could effectively predate on both young and mature cotton mealybug crawlers,though preference was more for the younger ***,nymphs and adults of *** could not predate on the adult stage of the *** predator:pest ratios were tested in cage studies and it emerged that *** adults released against the mealybug crawlers at a ratio of 1:5 and nymphal release at 1:10 caused maximum mortality of the mealybug *** the fast multiplication rate of cotton mealybug and the large number of predators which have to be released to manage them,further detailed studies are necessary on utilizing *** to target the neonates and younger stages of the cotton mealybug in field conditions.

关键词： Anthocoridae Blaptostethus pallescens feeding potential host stage preference mealybug Phenacoccus solenopsis

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