The influence of narrow and wide-row soybeans on infestations of bean leaf beetle (BLB), Cerotoma trifurcata (Forster) (Coleoptera: Chrysomelidae) adults, a vector of bean pod mottle virus (BPMV), and associated incidence of bean pod mottle (BPM) disease were investigated in maturity groups IV and V soybeans in Mississippi. Maturity group IV soybeans had greater cumulative BLB numbers and greater incidence of BPM than maturity group V soybeans in 2000, but not in 2001. Row width was not shown to affect beetle numbers in either study year, but a greater incidence of BPM occurred in narrow row soybeans in 2001 and Maturity Group IV soybeans in 2000. There was no significant correlation between numbers of BLB adults and soybean plants infected with BPM virus when data was analyzed within sample dates or by seasonal totals. Greater yields were obtained in maturity group V soybeans than in maturity group IV soybeans in 2000, but not 2001, whereas row width had no significant effect on yield in either 2000 or 2001. The results presented herein suggest that further investigations of soybean row spacing in relation to BLB and BPM disease should consider large experimental plots to minimize beetle dispersal and spread of BPM disease.
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1 April 2008
Influence of Soybean Maturity Group and Row Width on Bean Leaf Beetle (Coleoptera: Chrysomelidae) and Bean Pod Mottle Disease in an Early Season Production System
Ronald C. Stephenson,
Henry N. Pitre
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Journal of Agricultural and Urban Entomology
Vol. 25 • No. 2
April 2008
Vol. 25 • No. 2
April 2008
bean leaf beetle
bean pod mottle disease
planting date
row width
soybeans