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Field application and effects of chlorpyrifos residues on Sitona discoideus (Coleoptera: Curculionidae) adults and implications for biological control by Microctonus aethiopoides (Hymenoptera: Braconidae)

M. McNeill ; L. Hunt ; R. Chapman | 1996

Chlorpyrifos was applied to field lucerne at a rate (0.3 kg/ha) recommended to control the weevil Sitona discoideus Gyllenhal. The fate of the weevil population and that of the immature stages of its parasitoid Microctonus aethiopoides Loan were[...]

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