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Residue of insecticides in organic soils



Residue of insecticides in organic soils



Resume des Recherches, Station de Recherches, Saint Jean, Quebec 9: 48



Isofenphos (Amaze) was applied as a band treatment at 2 and 4 kg/ha to field plots of 2 different organic soils in Quebec in which onions were grown. About 80% of the insecticide was still in the soil 8 weeks after application, and gave good control of the onion maggot Up to 66% was still present at harvest after 17 weeks. The edible portion of onions grown in soil treated at 2 kg/ha contained 0.003 p.p.m., and the corresponding residue for treatment at 4 kg/ha was 0.008 p.p.m.

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Accession: 000969599

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