بعض أوجه التكامل بين المفترس (Muls)‎ Stethorus gilvifrons و المبيد Thiamethoxam لمكافحة الذبابة البيضاء (Gen.)‎ Bemisia على محصول القطن

Abstract EN

The whitefly Bemisia tabaci is considered one of the most important pest on cotton in Iraq .

The pest causes considerable damage under heavy infestation.

Previous studies indicated the effectiveness of the insecticide thiamethoxam and the predator Stethorus gilvifrons against the whitefly when each used alone .

Therefore, the present study was initiated to investigate the combined effect of both the insecticide and the predator for controlling the whitefly on cotton under laboratory and field conditions.

Results indicated that 100% mortality was obtained during a period of three days after thiamethoxam appli&ttion 011 soil at rate of 15mg/plant with the presence of the predator.

The use of each the insecticide or the predator alone resulted in 69% and 75% mortality under laboratory conditions, and 84 and 67% under field conditions, respectively.

Percent mortalities for control treatment were 4% and 9% under laboratory and field conditions, respectively.

Result also indicated that thiamethoxam had no mortality effect on the predator when used on soil at rate of 15mg/plant during the period of the study.

Therefore, the integration of the predator S.gilvifrons and the insecticide thiamethoxam can be considered as a promising practice for the control of the whitefly Bemisia tabaci on cotton in Iraq.