International Journal of Entomology Research

International Journal of Entomology Research


International Journal of Entomology Research
International Journal of Entomology Research
Vol. 6, Issue 3 (2021)

Effect of planting date and plant stage on the infestation rate of common bean plants Phaseolus vulgaris with certain pests in Egypt


Marwa AM Abd-Allah, Maha AM Tantawy, Ahmed Abdel-Monem Taha

Three planting dates, (Aug., 15th, Aug., 29th and Sep., 12th) and three plant stages (seedling, flowering and (flowering +fruiting) were evaluated during two successive years 2018 and 2019 to determine their effects on population densities of principal pests (Bemisia tabaci Genn., Thrips tabaci Lind., Aphids [Aphis craccivora Koch., A. gossypii and Myzus persicae Sulz.], leaf miner (Melanagromyza phaseoli Tryon), Polyphagustarsonomus latus and Tetranychus urticae Koch.), infesting the common bean (Phaseolus vulgaris L.) in Egypt. Results of both studied years revealed that planting of common bean seeds in the 1st and 2nd planting dates resulted in slight infestation with (B. tabaci Genn., T. tabaci Lind., Aphids [A. craccivora Koch., A. gossypii and M. persicae Sulz.], leaf miner [Melanagromyza phaseoli Tryon] and P. latus), and an increased infestation rate during 3rd one, and inversely, higher infestation rate with T. urticae Koch. in the 1st and 2nd planting dates and less rate during the 3rd one. The combined effect (E.V.%) of planting dates and plant stages on infestation rates with the investigated pests was calculated separately and altogether using multiple regression analysis and showed that the combined effect of different planting dates on pests' population densities were (30% and 29%),(16% and 35%) and (48% and 48%) for the three planting dates, while the combined effect of plant stages were (39% and 34%), (24% and 42%) and (61% and 19%), in the two years, respectively. The combined effects altogether were 31.50 and 38.69 % for tested planting dates, and 47.95% and 42.67% for tested plant stages in the two years, respectively indicating that plant stages may play a more important role in affecting the studied pests' population densities.
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How to cite this article:
Marwa AM Abd-Allah, Maha AM Tantawy, Ahmed Abdel-Monem Taha. Effect of planting date and plant stage on the infestation rate of common bean plants Phaseolus vulgaris with certain pests in Egypt. International Journal of Entomology Research, Volume 6, Issue 3, 2021, Pages 184-191
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