2024, Vol. 5, Issue 2, Part A
Impact of insecticides applied in cotton fields on some piercing-sucking insects, pink bollworm, associated predators and Bemisia tabaci parasitoids
Author(s): Amany A Khalifa, Hend S El-Tahawe and Ahmad I Saad Allah
Abstract: Cotton, Gossypium barbadense L. is the most important and widely cultivated fiber crop in Egypt and allover the world. Unfortunately, this crop is subject to infestations of too many insect pests which result in considerable yield losses, particularly piercing-sucking insect pests and pink bollworm, Pectinophora gossypiella. This work was carried out at the experimental farm of Cotton Research Institute, located at Sakha Agricultural Research Station, during 2022 and 2023 seasons to assess the effect of periodical insecticide applications on infestations of aphids, leafhoppers, whitefly, pink bollworm, associated insect predators, as well as Bemisia tabaci parasitoids. Aphid population decreased by 83.12 - 84.82% due to insecticide treatments, leafhoppers and whitefly decreased by 50.44- 63.99% and 78.91% - 93.79%, respectively. The insect predatory populations were also negatively affected by the periodical applications of insecticides, with 49.12- 83.04%, 65.29 -71.16% and 23.12- 40.21% for Orius spp, coccinellids and Chrysoperla carnea. The seasonal bollworm infestations averaged 42.29% and 24.00% in the first season and 52.57 and 24.57% in the second season in untreated and treated cotton plots, respectively. The seasonal averages of parasitsm of Bemisia tabaci nymphs by Eretmocerus mondus and Encarsia lutea were 22.28 and 7.50% in the first season and 24.00 and 6.34% in the second season in the untreated and treated cotton fields, respectively. Data of the current research reveal the high hazards of periodical applications of insecticides against natural enemies prevailing in cotton fields. So, these synthetic insecticides should carefully be applied within the integrated pest management.
DOI: 10.33545/27080013.2024.v5.i2a.157
Pages: 58-63 | Views: 308 | Downloads:
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How to cite this article:
Amany A Khalifa, Hend S El-Tahawe, Ahmad I Saad Allah. Impact of insecticides applied in cotton fields on some piercing-sucking insects, pink bollworm, associated predators and Bemisia tabaci parasitoids. Acta Entomol Zool 2024;5(2):58-63. DOI: 10.33545/27080013.2024.v5.i2a.157
