Environmental Entomology (1992) 21, 1002-1006

Peter C. Schroeder, John W. Van Duyn and Robert P. Patterson (1992)
Nodulation, nitrogen fixation, and organ dry weight of soybean infested with southern corn rootworm (Coleoptera: Chrysomelidae) larvae
Environmental Entomology 21 (5), 1002-1006
Abstract: Nitrogen fixation, nodulation, and organ dry weights of soybean infested with the larvae of the southern corn rootworm, Diabrotica undecimpunctata howardi Barber, were estimated under controlled conditions. Larval southern corn rootworm reduced the nitrogen-fixing activity of mid-vegetative and early reproductive soybean, Glycine max Merrill. Soybean of both stages responded to the infestation and subsequent injury by increasing nodulation and organ dry weights of below-ground tissues relative to above-ground tissues. Infestation increased the dry weight of small nodules on vegetative plants and caused a 78.6% increase in the total number of nodules on R5 plants. Leaf area as well as leaf and stem dry weight was reduced in vegetative plants by infestation.
(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:
damage/losses/economics

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Diabrotica undecimpunctata	Soybean (Glycine max)	U.S.A. (SE)