Effect of climatic factors on the abundance of the common pests infesting mungbean plants in Alexandria, Egypt [electronic resource].

Includes references.

The present work was carried out in Alexandria region during 1999 and 2000 seasons to study the population fluctuations of the most common pests infesting mung bean plants namely, Bemisia tabaci (Genn.), Aphis gossypii (Glover), Empoasca lybica (DeBerg)., Nezara virldula L., Thrips tabaci (L.), Liriomyza trifolii (Becker) and Tetranychus spp. the obtained results revealed that L. trifolii had the higher percentage of pest infestation. Moreover, it had the highest rate of infestation in July and August. Tetranychus spp. also, had the highest rate of infestation in July more than the other pests. On the contrary, N. virldula had the loweSt rate of infestation during the two seasons. Multiple regression coefficients and the determination coefficient (R2) of maximum & minimum temperatures, relative humidity and wind speed on the population densities of the examined pests were performed for both seasons. The obtained results indicated the important role of weather factors, that influenced the activtly and abundance of pests on mung bean plants. Moreover, (R2) values showed also that some other effects may play a role in the population densities. Such remaining effects might be attributed to other environmental or biological factors, in addition to the experimental error.

Summary in Arabic.

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