Parthenium hysterophorus Linnaeus (Asteraceae) is a toxic weed found abundantly in major agroecosystems of the world. The weed is inhabited by both phytophagous Chrysomelidae (Coleoptera), used as biocontrol agents, and the predaceous Coccinellidae (Coleoptera). The present investigation was designed to assess the feeding attributes and larval development of Zygogramma bicolorata Pallister (Coleoptera: Chrysomelidae) in the presence of semiochemical tracks of coccinellid beetles. Results revealed that the presence of coccinellid semiochemical tracks on the weed reduced larval consumption rates, conversion efficiencies, and growth rates. The feeding deterrent effects of the semiochemical tracks were species specific. Larvae accumulated lower concentrations of glucose, proteins, and triacylglycerols and exhibited reduced body biomass in the presence of semiochemical tracks. The coccinellid semiochemical tracks also promoted Z. bicolorata larvae to accelerate their developmental rates and develop faster than the larvae reared in the absence of semiochemical tracks. While the fourth instars consumed food maximally and were heavier, their food use efficiencies were lower than the other instars. Our findings, therefore, suggest that the presence of semiochemical tracks of coccinellids on P. hysterophorus impedes its biological control by Z. bicolorata larvae.

爬山hen（Asteraceae）是一种有毒杂草，广泛存在于世界主要农业生态系统中。杂草中既有用作生防剂的植食性葫芦科（鞘翅目），也有食前的球虫科（鞘翅目）。本研究旨在评估双色bi虫的摄食属性和幼体发育Pallister（鞘翅目：金眼科）存在球虫甲虫的化学信息痕迹。结果表明，杂草中球虫的化学信息迹线的存在降低了幼虫的消耗率，转化效率和生长速度。符号化学轨迹的摄食威慑作用是特定于物种的。幼虫积累了较低浓度的葡萄糖，蛋白质和三酰基甘油，并且在存在化学信息迹线的情况下，体内生物量减少。球虫的化学信息轨迹也促进了双色Z.幼虫可以加快其发育速度，并且比在没有化学信息的情况下饲养的幼虫发育更快。尽管四龄幼虫最大程度地消耗食物并且较重，但其食物使用效率却低于其他幼龄幼虫。因此，我们的发现表明，在球状疟原虫上球虫的化学信息迹线的存在阻碍了其对双色Z.幼虫的生物学控制。