Abstract
Pirimiphos methyl when sprayed at dosages of 10 and 15 p.p.m., effectively protects dehusked maize in cribs for 3 months against incipient or cross infestation by stored product insects. Longer storage would however require a reapplication of the insecticide. At 5 p.p.m., pirimiphos methyl is not a protectant against insect infestation of maize stored beyond 1 month.
As insect numbers and grain damage increased, viability of infested maize decreased. Only when grain embryo is damaged or endosperm destroyed can insect infestation prevent grain germination.
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References
Ivbijaro M. F. (1978) Guide to the Construction of A Crib. Extension Guide Series No. 1. Joint Programme, University of Ibadan/Bendel State Ministry of Agriculture.
Lahue D. W. (1975) Pirimiphps methyl as a short term protectant of grain against stored-product insects. J. econ. Ent. 68, 235–236.
Lahue D. W. (1976) Pirimiphos methyl: effect on populations of Tribolium confusum and T. castaneum in wheat. J. econ. Ent. 70, 136–137.
Redlinger L. M. (1976) Pirimiphos methyl as a protectant for farmers stock peanuts. J. econ. Ent. 69, 377–379.
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Ivbijaro, M.F. The Efficacy of Pirimiphos Methyl in Crib Storage Of Maize in South Western Nigeria. Int J Trop Insect Sci 1, 295–296 (1981). https://doi.org/10.1017/S1742758400000552
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DOI: https://doi.org/10.1017/S1742758400000552