The use of pesticides may pose a serious threat to soil and water quality, human health, food safety, aquatic species and beneficial insects. Biological control is an effective component of integrated pest management comprising importation, augmentation and conservation. Conservation of natural enemies could enhance or limit the efficiency of herbivorous insect pests. The present study was designed to evaluate the efficiency of Diaeretiella rapae (McIntosh) and other food resources impacts on parasitoid’s fecundity, survival and efficiency. The effect of different insecticides [Carbosulfan, Imidacloprid, Diafenthiuron and Lufenuron] was also evaluated in a laboratory controlled experiment. The results revealed that females fed on aphid honeydew proved to be of poor quality as compared to other sugar sources, including honey and sugar solution and has a positive impact of mating on monogenesis. The negative impact was observed on oviposition activity by female reared in the laboratory having less number of mature eggs than females collected in the field. All insecticides demonstrated dose-dependent mortality of D. rapae. In conclusion, food and host availability and insecticides affect the efficiency of D. rapae. These results could lead to the hypothesis that D. rapae females have a high mortality rate in the field due to lower aphid hosts.

农药的使用可能对土壤和水质，人类健康，食品安全，水生物种和有益昆虫构成严重威胁。生物防治是有害生物综合治理的有效组成部分，包括进口，扩大和保存。保护天敌可以增强或限制草食性害虫的效率。本研究旨在评估小菜蛾的功效（McIntosh）和其他食物资源会影响拟寄生虫的繁殖力，生存能力和效率。在实验室控制的实验中还评估了不同杀虫剂的效果[Carbosulfan，吡虫啉，Diafenthiuron和Lufenuron]。结果表明，与其他糖源（包括蜂蜜和糖溶液）相比，以蚜虫蜜露为食的雌性品质差，并且对交配有积极影响。在实验室饲养的雌性成熟卵的数量少于实地采集的雌性，观察到对产卵活动的不利影响。所有的杀虫剂都证明了雷柏蝇的剂量依赖性死亡率。总之，食物和寄主的可利用性以及杀虫剂会影响rap。rapae的效率。。这些结果可能导致假说，由于蚜虫寄主的减少，菜豆小雌虫在田间具有很高的死亡率。