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Interaction of Insects, Fungi, and Burial on Velvetleaf (Abutilon theophrasti) Seed Viability

Published online by Cambridge University Press:  12 June 2017

Robert J. Kremer
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Crop Prod. Res. Unit, Univ. Mo., Columbia, MO 65211
Neal R. Spencer
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., North. Plains Res. Lab., Sidney, MT 59270

Abstract

A scentless plant bug feeds on velvetleaf seeds. Fungi, dominated by the genera Fusarium and Alternaria, were isolated from insect-attacked seeds at levels related to insect density on the plants. The combined effects of insect feeding and fungal infection decreased seed germination. Burial of insect-attacked seeds in soil for 24 months reduced seed survival and increased Fusarium infection. Decreases in velvetleaf seed viability and survival in soil caused by a seed-feeding insect and associated seed fungi suggests that subsequent infestations by velvetleaf can be decreased through integrated use of the two biological control agents.

Type
Research
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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