A re-examination of economic injury levels for potato leafhopper (Homoptera : Cicadellidae) on soybean

Reference Report for SoyBase111901827

Title:	A re-examination of economic injury levels for potato leafhopper (Homoptera : Cicadellidae) on soybean
Authors:	Hunt, T.E., Higley, L.G., Pedigo, L.P.
Source:	J. Entomol. Sci. 2000, 35(2):97-104
Abstract:	The potato leafhopper, Empoasca fabae (Harris), is an occasional pest of seedling soyabean throughout the eastern United States. Economic injury levels (EIL) for E. fabae on soyabean are not available for all vulnerable soyabean stages, nor do they reflect current understandings of soyabean response to injury or EIL calculation methodology. Damage terms were estimated for seedling soyabean stages using curve-fitting techniques that consider the vulnerability of the expanding leaf tissue of seedling soyabean. Yield loss for stage V1 soyabean was 43.58 kg ha-1 E. fabae-1 plant-1, for V2 was 20.41 kg ha-1 E. fabae-1 plant-1, for V3 was 13.10 kg ha-1 E. fabae-1 plant-1, and for V4 was 9.55 kg ha-1 E. fabae-1 plant-1. Economic injury level matrices were developed to reflect changing economic conditions and management costs for V1 through V4 soyabean. The EILs are 1.4 to 3.6 E. fabae plant-1 for V1 soyabean, 3.0 to 7.8 E. fabae plant-1 for V2 soyabean, 4.7 to 12.2 E. fabae plant-1 for V3 soyabean, and 6.5 to 16.7 E. fabae plant-1 for V4 soyabean.

Funded by the USDA-ARS. Developed by the USDA-ARS SoyBase and Legume Clade Database group at the Iowa State University, Ames, IA

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