Control effect of neonicotinoid insecticides on apple leaf miner, Phyllonorycter ringoniella (Lepidoptera: Gracillariidae)
2007
Funayama, K.(Akita-ken. Agriculture, Forestry and Fisheries Research Center, Yokote (Japan). Fruit Tree Experiment Station) | Ohsumi, S.
When an outbreak of Phyllonorycter ringoniella (PR) occurred in apple orchards in Akita Prefecture in 2006, six neonicotinoid insecticides were sprayed on apple trees during the emergence of PR adults of the first generation (mid-June). The number of mines (injury marks) made by PR larvae of the second generation (mid-July) in apple trees showed no significant difference between the insecticides applications. However, the numbers of mines made by PR larvae of the third generation (mid-August) in apple trees sprayed with thiacloprid and acetamiprid were significantly smaller than those in apple trees sprayed with clothianidin imidacloprid, dinotefuran and thiamerhoxam. Those in apple trees sprayed with clothianidin were significantly smaller than those in apple trees sprayed with thiamerhoxam. Those in apple trees sprayed with other insecticides showed no significant difference. These results indicate that the control effect of neonicotinoid insecticides on PR significantly differs between the active components of these insecticides.
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