Determining the appropriate spray time for Cydiapomonella(Lep: Totricidae) in apple orchards using sex pheromone and degree day in Khanehzenyan, Fars

Subject Areas : Plant Protection

Seyedeh Negar Daneshnia ¹ , Mahmood Alichi ² , Bahram Heidari ³

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Received: 2011-07-12 Accepted : 2012-02-10 Published : 2012-03-20

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Abstract :

Codling moth, Cydiapomonell, is the key pest of apple orchards at Khanehzenyan, Shiraz, Fars, Iran. To determine the best application time of spraying via counting the number of trapped moths and recording the effective daily temperature during 2009-2011, pheromone traps used at the height of 1.5 m from the ground level with distance between traps of 85-100 m. The data was analyzed using Excel software. According to the results, the number of pest generations and spraying time were determined. The results indicated that C. pomonella had two complete and one partial or incomplete generation at Khanezenyan.The best time for chemical control of C. pomonella was coincidentwith the time of appearance of the first age larva and accumulation of 175 degree-days. The required sums of temperatures for completion of one generation of C. pomonellawere 766.5 and 770 degree-days for the years 2009 and 2011 respectively.Therefore, by this way we can reduce the irregular uses of chemical pesticides and environmental pollutions.  

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