Application of broad spectrum synthetic insecticides can disrupt the success of beneficial insects along with resurgence of pest because of their toxic effects on biocontrol agents. The sustainable pest management in agro-ecosystem demands parallel assessment of toxic impact of insecticides to target pests and their key biocontrol agents before integrating them with insecticide use in crops. Here sub-lethal effects of profenofos, citrus oil and their mixture at their sub-lethal concentration level (LC₂₅) recorded for citrus mealybug were assessed against adults of Cryptolaemus montrouzieri Mulsant (Coleoptera: Coccinellidae) and second instar larvae of Chrysoperla carnea Stephen under laboratory conditions through consumption of treated Planococcus citri individuals. Feeding rate significantly reduced when C. montrouzieri and C. carnea were fed separately on mealybug (preys) exposed to sub-lethal concentration of profenofos, citrus oil and their mixture. Maximum prey consumption (33.10 ± 0.8, 16.05 ± 0.30 mealybug numbers) was observed in citrus oil treatment followed by single treatment of profenofos (21.05 ± 0.80, 10.85 ± 0.30) when compared with control (40.15 ± 0.80, 24.85 ± 0.30) (untreated) for C. montrouzieri and C. carnea, respectively after 24 h. Lowest number of P. citri consumption was assessed in mix of profenofos with citrus oil (15.15 ± 0.80, 7.75 ± 0.30) for C. montrouzieri and C. carnea respectively. Mortality of both predators was influenced by ingestion of contaminated mealybug such as least mortality (15%, 35%) was recorded with citrus oil while maximum (25%, 60%) in mixture of profenofos compared to control (10%, 30%) for C. montrouzieri and C. carnea, respectively. Predator preferences behavior also showed avoidance response towards profenofos and its mix with citrus oil as both predators spent maximum time (minutes) on leaves treated with citrus oil followed by profenofos whereas least was observed on mix of profenofos with citrus oil when compared with untreated leaves (control). Citrus oil alone at sub-lethal concentration may be utilized with both C. montrouzieri and C. carnea. From present findings, use profenofos even at sub-lethal concentration should be avoided when C. montrouzieri adult and /or larvae of C. carnea may be used for mealybug suppression.

广谱合成杀虫剂的应用会破坏有益昆虫的成功以及害虫的卷土重来，因为它们对生物防治剂有毒性。农业生态系统中的可持续害虫管理要求在将杀虫剂与农作物中的杀虫剂使用结合起来之前，同时评估杀虫剂对目标害虫及其关键生物防治剂的毒性影响。此处针对柑橘粉蚧记录的丙磺诺磷、柑橘油及其混合物在其亚致死浓度水平 (LC ₂₅ ) 的亚致死作用对Cryptolaemus montrouzieri Mulsant（鞘翅目：瓢虫科）和Chrysoperla carnea Stephen 的二龄幼虫进行了评估通过消耗处理过的实验室条件柑橘蓝球藻个体。当C. montrouzieri和C. carnea分别喂食暴露于亚致死浓度的 profenofos、柑橘油及其混合物的粉蚧（猎物）时，喂食率显着降低。与对照组 (40.15 ± 0.80, 20.30) 相比，在柑橘油处理中观察到最大猎物消耗（33.10 ± 0.8, 16.05 ± 0.30 粉蚧数量），然后是单独处理 profenofos (21.05 ± 0.80, 10.85 ± 0.30) ) 对于C. montrouzieri和C. carnea，分别在 24 小时后。的最低数P.螨消费与柑橘油丙溴磷混合物评估（15.15±0.80，7.75±0.30），用于C.孟氏和C. carnea分别。两种捕食者的死亡率都受到摄入受污染粉蚧的影响，例如使用柑橘油记录的死亡率最低 (15%, 35%)，而与对照 (10%, 30%) 相比，在 profenofos 混合物中的死亡率最高 (25%, 60%)分别为C. montrouzieri和C. carnea。捕食者的偏好行为也显示出对 profenofos 及其与柑橘油混合的回避反应，因为与未处理的叶子相比，在用柑橘油处理的叶子上花费的时间最长（分钟），然后是 profenofos，而在 profenofos 与柑橘油的混合上观察到的时间最少。控制）。亚致死浓度的柑橘油可单独用于C. montrouzieri和C. carnea. 从目前的研究结果来看，当C. montrouzieri成虫和/或C. carnea幼虫可用于抑制粉蚧时，即使在亚致死浓度下也应避免使用 profenofos 。