Population density and effect of some weather factors on the main insect pests attacking cowpea plants at Mansoura district [electronic resource].

Includes reference.

Field experiments were carried out at the farm of Agriculture Research Center of the Faculty Agriculture, Mansoura University during the two successive seasons 2012 and 2013. The obtained results revealed that, six injurious insects were recorded infesting cowpea plants during the two successive seasons, these insect species namely: Aphis gossypii Glover, Aphis craccivora Koch, Cosmlyce boeticus L., Liriomyza trifolii Burgess, Empoasca lybica Berg, Nezara viridula L. The dominant abundant species was A craccivora; the lowest abundant species was C .beoticus during the two seasons of study. The data revealed that, A.gossypii had one peak in the first planting date, three peaks in the second planting date and two peaks in the third planting date respectively, during the first season of study. On other hand these insect species had three peaks in the first and the second planting dates, while that was two peaks in the third planting date during the second season of study. Keywords: cowpea plants, main insect pests population density, seasonal abundance, whether factors.

Summary in Arabic.

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