Influence of insecticide application timing on the field efficacy of chemical treatments against Agonoscena pistaciae (Hemiptera: Psyllidae)
نویسندگان
1 Postdoctoral Researcher, Department of Plant Protection, University of Tehran, Tehran, Iran.
2 Department of Plant Protection and Production, Institute of Agriculture, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran.
3 Department of Plant Protection, Faculty of Agriculture and Natural Resources, Persian Gulf University, Bushehr, Iran.
doi
10.48311/jcp.2025.76292.0چکیده
The pistachio psyllid, Agonoscena pistaciae Burckhardt & Lauterer, is one of the most destructive pests of pistachio trees in Iran. This study evaluated the efficacy of five chemical compounds including abamectin (EC 1.8%), acetamiprid (SP 20%), hexaflumuron (EC 10%), hexaflumuron (EC 10%) + abamectin (EC 1.8%), and thiamethoxam (SC 24%) at concentrations of 0.6 ml/L, 0.25 g/L, 0.7 ml/L, 0.5 + 0.3 ml/L, and 0.4 ml/L, respectively. The insecticides were applied at two different timings: early control (second week of May) and late control (fourth week of June) in two pistachio orchards in Isfahan Province, Iran. Nymphal mortality was recorded one day before spraying and at 3, 7, 14, and 21 days post-treatment. In both application times, thiamethoxam and abamectin exhibited the highest and lowest insecticidal efficacy, respectively. The early control was more efficient than the late control in all treatments. Therefore, early application of thiamethoxam is recommended for optimal chemical control of pistachio psyllid.
