Effect of insecticides against three aphid species collected from sweet pepper

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  • ピーマンで発生する３種アブラムシ類に対する殺虫剤の有効性
  • ピーマン デ ハッセイ スル 3シュ アブラムシルイ ニ タイスル サッチュウザイ ノ ユウコウセイ

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Abstract

<p>The direct and residual efficacy of insecticides and the effect of different treatments (spraying or soil treatments) against three aphid species: Aulacorthum solani (Kaltenbach), Myzus persicae (Sulzer), and Aphis gossypii, collected from sweet pepper in Kagoshima Prefecture, Japan, were evaluated. Neonicotinoid insecticides: acetamiprid, imidacloprid, clothianidin, dinotefuran, thiamethoxam, and nitenpyram; and organophosphate: acephate; diamide: cyantraniliprole; and others: spirotetramat, pymetrozine, pyrifluquinazon, and flonicamid were tested by spraying or soil treatments (scattering of granules or drenching of wettable powder). Insecticides were applied to sweet pepper plants in a greenhouse (mean air temperature: 24.5°C), and sweet pepper leaves that were treated with insecticides were provided to aphids in the laboratory (25°C, natural day length) at 6 hours and 3, 7, 14, 21, 28, and 35 days after insecticide treatments. The mortalities of aphids were compared at 96 hours after rearing adults. The effect of insecticides did not differ significantly among the aphid species (GLM, P>0.05). The maximum mortality of aphids ranged from 80% to 100%, and all insecticides were effective against aphids. However, soil treatments resulted in higher mortalities (GLM, P<0.0001) and a longer periods if effectiveness than spraying. The mortalities were over 70% from 3 days to 28 days after applying six neonicotinoid as granules, and the same result was observed from 3 days to 35 days after acephate granule treatment.</p>

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