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The Impact of Pesticides - Academy Publish

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mefenacet and simetrin were observed in May and July, respectively; those <strong>of</strong>fungicides (phthalide and isoprothiolane) and insecticides (fenitrothion andfebobucarb) were observed in July–August (Mitobe et al. 1999). <strong>The</strong> herbicideconcentrations were generally higher in Mayand June than in July and August, which reflects that the herbicides are applied inthe paddy fields <strong>of</strong> the investigated river basin mostly during May through June. Onthe other hand, insecticides and fungicides were detected at the highestconcentrations in June–July and July–August, respectively. <strong>The</strong> difference dependedon their application periods, i.e., the insecticides were applied mainly in June–July,and the fungicides in July –August.<strong>Academy</strong><strong>Publish</strong>.org - <strong>The</strong> <strong>Impact</strong> <strong>of</strong> <strong>Pesticides</strong>208

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