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With this project, it is aimed to determine the time of the struggle with the poppy root weevils ( Ethelcus denticulatus  Schrank) (Coleoptera: Curculionidae), which is the most important pest of poppy fields ( Papaver somniferum L.) (Rhoedales; Papaveraceae). According to the findings, it has been determined that after the second week of March in the Usak province, poppy root weevils start to emerge from the soil and adults may be found until the first week of July. The most important factor in the emergence of the pests from soil to surface is temperature. In the second week of March in which effective temperature reached to 14 oC, the poppy root weevils started to emerge to the soil surface in 2014 and 2015. P eak of the poppy root weevils was determined to be in the second week of April. The sum of effective temperatures at this date was determined to be 70.6 oC in 2014 and 90.4 oC in 2015. After the poppy root weevil’s emergence reached the peak, the first larvae began to appear about 10 days later. According to this, when the insect populations are the highest and the sum of effective temperatures is 70 - 90 oC, it is suggested to make chemical struggle.

Determination Of Some Biological Characteristics Of Poppy Root Weevils (Ethelcus denticulatus (Schrank) (Coleoptera: Curculionidae) For Struggle