Effect of mean temperature and relative humidity on the population abundance of the serpentine leaf miner Liriomyza trifolii (Diptera: Agromyzidae) and its parasitoids Diglyphus isaea (Hymenoptera: Eulophidae) and Opius pallipes (Hymenoptera: Braconidae)

Abstract

The present study was carried out in Surman region kidney beans and broad beans were selected as summer and winter host plants during seasons 2020/2021. Correlation values between the population of Liriomyza trifolii (Burgess) (Diptera: Agromyzidae) and mean temperature (°C) were recorded (0.81 and -0.27) in the summer and winter seasons, respectively. A negative correlation was calculated between the population of L. trifolii and relative humidity (RH.) in the summer season (-0.27) and a positive correlation occurred in the winter season recording (0.19). Correlation recorded between the population of Diglyphus isaea (Walker) Hymenoptera: Eulophidae) and mean temperature °C recorded (0.70 and -0.1) in the summer season and winter, respectively. On the other hand, correlation values were calculated (-0.17 and 0.36) between the population of D. isaea and (RH.) in the summer and winter seasons respectively. Positive correlations were recorded between the population of Opius pallipes (Wesmeal) (Hymenoptera: Braconidae) and mean temperature °C in summer andwinter seasons with r values (0.61 and 0.035). Moreover, a negative correlation was calculated between the population of O. pallipes and (RH.) in the summer and winter seasons with r values (-0.30, and -.19), respectively.