The Role of Predators Insects in Regulating Population Densities of Certain Piercing Sucking Pests on Squash Plants in Egypt | ||||
Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control | ||||
Article 3, Volume 9, Issue 3, December 2017, Page 17-30 PDF (487.43 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/eajbsf.2017.17025 | ||||
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Authors | ||||
Saleh A. A. A.1; H. M. El-Sharkawy2; F. S. El-Santel2; Rehab A. Abd El-Salam2 | ||||
1Plant Protection Research Institute, Agricultural Research Center (ARC), Dokki, Giza, Egypt | ||||
2Plant Production Dept., Faculty of Technology & Development, Zagazig University, Egypt | ||||
Abstract | ||||
Studies were carried out at Diarb Negim, Sharkia governorate during two successive seasons 2014-2015 and 2015-2016. Obtained results showed that in autumn plantation, there were two peaks of Aphis gossypii (Glover) on squash plants, one peak at last week of November and other at third week of December in 2014 season. On the other hand, Bemisia tabci (Genn.) had three peaks, in second week of November, first week of December and third week of December in 2014 season and two peaks of infestation in fourth week of November and December in 2015 season of autumn plantation while, three peaks in summer plantation were obtained on fourth week of (April &May) and second week of June in 2015 season respectively. Investigation revealed that, squash plants infested by few numbers of thrips during autumn plantation throughout the two seasons. Statistical analysis of the obtained data cleared highly negative correlation between aphid &whitefly and temperature in autumn plantation in both seasons. Also, the mean R.H showed a positive significant correlation on population density of A. gossypii in second season 2015 of autumn plantation. In summer plantation, the minimum R.H% showed a negative correlation with Orius spp. population and a positive significant correlation with C. carnea population in the first season 2015. The predaceous insects found associated with pericing sucking pests were Orius spp., Coccinella undecimpuncta L., Chrysoperla carnea Steph., Metasyrphus corolla F. and few number of Paederus alferii (Koch ) and true spider. The results revealed that Orius spp. had three peak in two season in autumn plantation, in first and third week of November, and third week of December in both seasons respectively. Meanwhile there was two peaks in first week of May and third week of June in 2015 season of summer plantation. Chrysoperla carnea had two peaks in autumn plantation during two seasons, third week of November, second week in December in 2014 and fourth week of November, third week of December in 2015 respectively. Also two peaks in summer plantation during 2015 season in first week of April and second week of June. | ||||
Keywords | ||||
aphid; whitefly; thrips; Predators | ||||
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