Abstract
Studieswere carried out at Diarb Negim, Sharkia governorate during two successiveseasons 2014-2015 and 2015-2016. Obtained results showed that in autumnplantation, there were two peaks of Aphis gossypii (Glover) on squashplants, one peak at last week ofNovember 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, firstweek of December and third week of December in 2014 season and two peaks ofinfestation in fourth week of November and December in 2015 season of autumnplantation while, three peaks in summer plantation were obtained on fourth weekof (April &May) and second week of June in 2015 season respectively.Investigation revealed that, squash plants infested by few numbers of thripsduring autumn plantation throughout the two seasons. Statistical analysis ofthe obtained data cleared highly negative correlation between aphid&whitefly and temperature in autumn plantation in both seasons. Also, themean 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 populationin the first season 2015. The predaceous insects found associated with pericingsucking pests were Orius spp., Coccinella undecimpuncta L.,Chrysoperla carnea Steph., Metasyrphus corolla F. and few number of Paederusalferii (Koch ) and true spider. Theresults revealed that Orius spp. had three peak in two season in autumnplantation, in first and third week of November, and third week of December inboth seasons respectively. Meanwhile there was two peaks in first week of Mayand third week of June in 2015 season of summer plantation. Chrysoperlacarnea had two peaks in autumn plantation during two seasons, third week ofNovember, second week in December in 2014 and fourth week of November, thirdweek of December in 2015 respectively. Also two peaks in summer plantationduring 2015 season in first week of April and second week of June.
Highlights
The vegetable crops are a primarily main component of human daily meals.These crops are used, either fresh or after preparation
Squash is one of the most important cucurbitaceous vegetable cultivated in Egypt
Squash is consider very important crops from either, the fresh consumption . , this crop was chosen as experimental crops in this investigation .it is well known that insects especially piercing sucking one cause yield losses in vegetable crops as well as other crops. (Ali 1996, El-Khouly et al, 1998 and El-Lakwah et al 2011)
Summary
The vegetable crops are a primarily main component of human daily meals. These crops are used, either fresh or after preparation. Squash is one of the most important cucurbitaceous vegetable cultivated in Egypt It cultivated was increased during the past years especially in new reclaimed land for local consumption and exportation. Et al 1989 and El-Lakwah et al 2011). Squash is consider very important crops from either, the fresh consumption . , this crop was chosen as experimental crops in this investigation .it is well known that insects especially piercing sucking one cause yield losses in vegetable crops as well as other crops. Squash is consider very important crops from either, the fresh consumption . , this crop was chosen as experimental crops in this investigation .it is well known that insects especially piercing sucking one cause yield losses in vegetable crops as well as other crops. (Ali 1996, El-Khouly et al, 1998 and El-Lakwah et al 2011)
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