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| Soybean:
Glycine max (L.) Merrill (Pioneer 92B51) Bean leaf beetle (BLB); Cerotoma trifurcata (Fostera) Jerry Echtenkamp
& Tom Hunt
CONTROL OF BEAN LEAF BEETLE IN SOYBEANS, 2000
Foliar
treatments of registered and non-registered insecticides for BLB control
were applied to soybean plots on 16 May. Experimental design was a randomized complete block with four replications.
All liquid insecticides were applied with a back-pack sprayer
calibrated to deliver 20 gpa at 30 psi.
Two d prior to application, beetle counts were taken with three
random samples in each replication. The average number of beetles/two meters of
row averaged over all pretreatment samples were 12 beetles /two meters
of row. Four post treatment
beetles counts were taken on d one, three, seven and 14.
Results were analyzed using analysis of variance procedures. Treatment means were separated using LSD procedures.
All treatments resulted
in significantly fewer beetles per two meters of row than the untreated
check on d one, three, and seven. Results
were variable among treatments on d one, three, and seven. There were no significant differences indicated
in beetles per two meters of row on d 14.
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