Starvation tolerance of Orius maxidentex Ghauri adults and the effect of temperature on their predation on Scirtothripps dorsalis Hood
This study aimed to investigate the starvation tolerance of Orius maxidentex adults under different supplemen-tary nutrient conditions.The survival time of O.maxidentex female adults was analyzed under three starvation conditions,no supplementary nutrient,supplementing mango stem,and supplementing honey.Additionally,the predation behavior of adult O.maxidentex on second-instar nymphs and adults of Scirtothrips dorsalis was observed at different temperatures.The results showed that female adults O.maxidentex had a survival time of 14.64 h,40.56 h,and 36.72 h,while male adults had a survival time of 15.12 h,38.44 h,and 30.00 h under different starvation conditions.The addition of mango stem or honey significantly prolonged the survival time of O.maxidentex adults,indicating that in the absence of prey,O.maxidentex can rely on the nutrients provided by plants to avoid starvation and death.The study assessed the effects of temperature on the predation of adult O.maxidentex on S.dorsalis.The predation responses of adult O.maxidentex to the 2nd instar nymphs and adults of S.dorsalis were consistent with the Holling type 11 model.Within 16-32 ℃,the predation efficiency of O.maxidentex on S.dorsalis increased gradually with the increase of temperature.At the same temperature,the searching effect decreased with the increase of prey.