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Sorghum (Sorghum hieolor (L.) Moench) genotypes regenerated from tissue culture were evaluated under field and laboratory conditions for resistance to leaf-feeding by the fall armyworm, Spodoptera frugiperda (]. E. Smith). Two regenerated lines were identified as having a significantly higher level of resistance to fall armyworm feeding as compared with the non-regenerated and susceptible parent, 'Hegari.' Laboratory studies measuring growth and development of fall armyworm were conducted with meridic diets containing dried sorghum foliage from regenerated or non-regenerated plant material. Significant reductions in larval weights were detected for two R. lines compared with the non-regenerated parent, suggesting that antibiosis may be involved. Free-choice studies revealed a significant degree of non-preference for the R. line that had shown the greatest adverse effect on fall armyworm growth in the developmental studies. These results indicate that tissue culture-induced variations can be a viable means of generating new sources of genetic diversity for use in crop improvement.
Document Type: Research Article
Publication date: April 1, 1991
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Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.