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Journal of Entomology and Zoology Studies
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ISSN Print: 2349-6800 | ISSN Online: 2320-7078

Journal of Entomology and Zoology Studies

2021, Vol. 9, Issue 1
Effect of certain climatic factors and plant age on population density of Aphis gossypii (Glov.) infesting tomato plants at Mansoura district, Dakhlia Governorate, Egypt

Eman A Shehata

The aim of this research is to determine the impacts of some climatic factors and plant age on the population density of the cotton aphid, Aphis gossypii (Glov.) on tomato plants. Field experiments were conducted at Mansoura district, Dakhlia Governorate, Egypt, during two successive growing seasons (2018/2019 and 2019/2020) to study the population density of A. gossypii (Glov.) (Hemiptera: Aphididae) on tomato plants (Hybrid T4 84 cultivar). Results indicated that A. gossypii infested tomato plants from beginning of October to mid-January during the two growing seasons. The cumulative counts of A. gossypii were 523.79 and 533.06 individuals per season for the two growing seasons, respectively. The total mean of A. gossypii population through the whole season was 65.47 ± 4.61 and 66.63 ± 3.86 individuals per five plants over the first and second growing seasons, respectively.
Generally, it was, found that the climatic conditions of half-monthly inspection dates were more favorite for A. gossypii to grow its population during October, November and December during the two growing seasons. Furthermore, it was found that the number of A. gossypii decreased during January month in two consecutive growing seasons. Results revealed that the combined effects of the climatic factors and the plant age can explain the variation in the population density of A. gossypii. The percentages of explained variance (E.V.%) were 99.92 and 99.95% for the two successive growing seasons, respectively. These information can be useful for planning an IPM program of aphid on tomato plants.
Pages : 19-25 | 113 Views | 24 Downloads
How to cite this article:
Eman A Shehata. Effect of certain climatic factors and plant age on population density of Aphis gossypii (Glov.) infesting tomato plants at Mansoura district, Dakhlia Governorate, Egypt. J Entomol Zool Stud 2021;9(1):19-25.
Journal of Entomology and Zoology Studies
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