Residualidad de insecticidas en arroz. Oryza satyva L.
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Abstract
A study was carried out on the residuality of: carbaryl, methamidophos, parathion methyl and deltamethrin in rice kind IR-880, applying for this purpose those pesticides at four different times during the rice growth cycle (independently) and at rates of 2.5; 0.6 ; 1.5 and 0.0125 kg a. i. /ha respectively, on the plants grown in four plots measuring 40 m2 each. The pesticide applications were made at 40, 30, 20 and 10 days before harvest. The residue evaluations were done on samples collected independently and by means of the following methods: gas chromatography with electron capture detector for deltamethrin, with phosphorous detector for methamidophos and parathion-methyl; and high performance liquid chromatography for carbaryl. These analyses were made on rice for human consumption. Deltamethrin, parathion methyl and carbaryl did not present residues in any varying above the respective limits of determination. Residues of methamidophos were lightly lower than LMR, when the insecticide applied 10 days before harvest.
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References
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