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Population trends of onion thrips Thrips tabaci L. Infesting certain onion cultivars and its control in Assiut governorate Upper Egypt [electronic resource].

By:

Sobhy A. H. Temerak

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Language: English Summary language: Arabic Description: p.169-178Other title:

خصائص مجاميع تربس البصل على بعض أصناف البصل ومكافحة فى محافظة أسيوط بصعيد مصر [Added title page title]

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Egyptian journal of agricultural research, 2015 v. 93 (1) A, Special issue [electronic resource]:

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In: Egyptian Journal of Agricultural Research 2015.v.93(1)A,SISummary: Population trend of the onion thrips Thrips tabaci infesting three common onion cultivars and it's control have been determined. The weekly population trend of T. tabaci indicated that the pest appeared on the tested onion cultivars in moderately high numbers at the beginning of January few' days after transplanting. The pest showed another two peaks during mid March and first April. This finding is considered as a proof that onion thrips has had three generations throughout onion growing season in Assiut governorate. Appearance of the pest in moderately high numbers after transplanting could be referring to the appearance of the first low peak before transplanting onion. Tow new chemical insecticides (Bieo 50% EC and Radiant 12 % SC versus Dolf 2.5% EC) were tested. Three concentrations of (Radiant 12 % SC) were used as follows: 26, 35 and 44 ml/100 litter water. Keywords: Thrips tabaci, Population trend, Control.

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Population trend of the onion thrips Thrips tabaci infesting three common onion cultivars and it's control have been determined. The weekly population trend of T. tabaci indicated that the pest appeared on the tested onion cultivars in moderately high numbers at the beginning of January few' days after transplanting. The pest showed another two peaks during mid March and first April. This finding is considered as a proof that onion thrips has had three generations throughout onion growing season in Assiut governorate. Appearance of the pest in moderately high numbers after transplanting could be referring to the appearance of the first low peak before transplanting onion. Tow new chemical insecticides (Bieo 50% EC and Radiant 12 % SC versus Dolf 2.5% EC) were tested. Three concentrations of (Radiant 12 % SC) were used as follows: 26, 35 and 44 ml/100 litter water. Keywords: Thrips tabaci, Population trend, Control.

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