The residual dynamics and the final residues of beta-cypermethrin,fenvalerate and triadimefon in cucumber were studied in greenhouse.The results indicated that with the recommended dosage,the half-life of beta-cypermethrin,fenvalerate and triadimefon was 1.29 days,3.15 days and 4.63 days respectively.Beta-cypermethrin had lower residue and high degradation rate in cucumber;on the third day after the second spraying,its residue had been much lower than the maximum residue limit of Chinese Standard for pollut...
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