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  • 1 Education and Extension Organization (AREEO), Yaman St., Chamran Hwy., P.O. Box 19395-1454., Tehran, Iran
  • 2 Education and Extension Organization (AREEO), Kermanshah, Iran
  • 3 Tehran Payam-e-Noor University
  • 4 University of Tehran, Karaj, Alborz, Iran
  • 5 Iranian Agricultural Engineering Research Institute, Karaj, Iran
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Sunn pest, Eurygaster integriceps, is a key pest of wheat and barley in Iran. At present, infested areas are treated with ground sprayers. A survey was conducted to evaluate the efficiency and calibration accuracy of ground hydraulic sprayers in Iran. The results showed that the motorized lance sprayer and manually operated sprayer were the most conventional sprayers, and fenitrothion EC 50% and deltamethrin EC 2.5% were the conventional insecticides against sunn pest in Kermanshah province. The mean efficacy percentage was 88% and 35% against nymphs and overwintered adults, respectively. In motorized lance sprayers, there were 5% and 90% overdosage of fenitrothion and deltamethrin, respectively; while, in manually carried sprayers, there were 5% and 25% overdosage of fenitrothion and deltamethrin, respectively. Applied dosages were 5-20% and 25-90% more than recommended dosages of fenitrothion and deltamethrin, respectively. Errors in effectiveness and applied dosage were higher in motorized lance sprayer than manually carried sprayers.

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