Abstract
Field tests demonstrated that selected sustainable agricultural practices influence intensity of fall armyworm (FAW), Spodoptera frugiperda (J. E. Smith), infestations of late planted maize, Zea mays, in double cropping systems. Reduced FAW infestations of seedling maize were associated with no-tillage as compared with plow-tillage practice. Maize in no-tillage plots required one less chlorpyrifos [0.56 kg (AI/ha] spray than in plow-tillage based on a 50% action threshold. Surface debris of winter cover crops influenced lags of FAW infestation on no-tillage maize. Surface residues from previous cover crops may account for the reduced infestations in no-tillage areas. Infestations among plots became similar as plants grew from within the mulch cover. Use of poultry manure as a soil amendment had no effect on FAW damage, but a tendency for increased yields was observed in poultry manure plots. Chlorpyrifos significantly reduced FAW feeding resulting in increased whole plant dry weight yield in treated plots.
Published Version
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