William Wyant, Bessie Green, and Fawzy Hashem. UMES, 1 College Ave, Princess Anne, 21853
Silver spotted skipper, Epargyreus clarus, is a common Lepidopteran pest of forage and grain soybean [Glycine max (L) Merr.] in several counties in the Delmarva region. The climate of this region has proven to be conducive to elevated pest growth and cause significant annual economic lose to the sustainable crop. Soybean field observations of the regional farms and the research plots at the University of Maryland Eastern Shore, Princess Anne, Maryland showed, as in previous years (2003 – 2006), from 50% to 70% leaf defoliation, respectively. In vitro studies of field grown forage soybeans (Moon Cake- control, 7P116, XB-32, Donegal, Tyrone, Tara, and Derry) and grain soybean (Schillenger 495RC- control, 9444169, SE73753, and SE73090) leaves were used to conduct an assay on the defoliation and tolerance of the Lepidopteran pest [0.1 -0.66g. weight (wt.) of larvae from control plots]. The forage soybeans assay showed that 7P116 was defoliated 85% with larvae wt. gain of 0.646g compared to control (Moon Cake) of 25% and 0.058g. wt., respectively. The grain soybeans assay showed that 491734 was 50% defoliated with larvae wt. gain of 0.732g compared to control (Schillenger 495RC) of 20% with 0.148g, respectively. These genotypes were found to be most significantly susceptible to E. clarus infection than the other assayed soybeans. Therefore, the data from this experiment suggest that genotype, larvae weight, and other environment conditions warrant further study as a viable strategy for insect control.
Back to Poster Session
Back to Short Abstracts
Back to The 2007 Joint AFGC and NEBCSA Conference (June 24-26, 2007)