Journal of Entomological Science (2001) 36, 57-66

Mark E. Kraemer (2001)
Insect resistance in vegetable and tofu soybeans
Journal of Entomological Science 36 (1), 57-66
Abstract: Ten tofu and 14 green-vegetable soybean, Glycine max (L.) Merrill, genotypes were evaluated over 3 yrs for resistance to defoliation by the corn earworm, Helicoverpa zea (Boddie), and seed damage by a hemipteran complex. Petri-dish assays were used to determine foliar antibiosis to corn earworm. Larvae were weighed after feeding for 10 d on excised soybean leaves. Hemipteran damage was determined at harvest by individually rating 300 randomly sampled seeds from each subplot for severity of damage and calculating a weighted damage index. The specialty soybeans most resistant to corn earworm defoliation were Tousan 122, Guanyun da hei dun, and Enrei; whereas, those with the least seed damage were Barc-6 and Houjaku. There was no significant (F=1.193; df = 1, 300; P < 0.276) correlation of larval weight with seed damage index. It is likely that different mechanisms are responsible for seed and foliage resistance. There was a small but significant correlation (F= 40; df = 1, 300); P < 0.001, R² = 0.12) of seed damage index with maturity group that may be related to the phenology of soybean seed development and insect populations.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Helicoverpa zea	Soybean (Glycine max)