Numerous reports exist which characterize yield loss and defoliation relationships. Management guidelines and decisions regarding defoliating pests have been based largely upon findings from one or more of those studies . The use of such studies as decision-making criteria may be limited since most defoliation yield-related research has been conducted in the Midwest with varieties , growth habits and environmental conditions widely divergent from those found in other areas of production.
Wells, P. W.; Joshi, J. M.; and Dively, G. P.
"Research Notes: Interactions of cultural practices with insect-induced stress on soybeans,"
Soybean Genetics Newsletter: Vol. 8
, Article 25.
Available at: http://lib.dr.iastate.edu/soybeangenetics/vol8/iss1/25