Just wanted to let you know that my MS/PhD graduate student (O. Wen Carter), Dr. Ted Webster-USDA/ARS, and I recently completed our first round of greenhouse experiments investigating potential Cadre resistance in sicklepod. Since collecting the seed last fall, we have been able to test 8 populations (Figure 1). We are very happy to report that
NONE of these 8 populations appear to be resistant!!!!! (Figure 2). We have 21 more populations to screen but will not likely tackle these until this fall (
too busy in the field right now and greenhouse will be getting too hot).
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| Figure 1. First 8 sicklepod populations tested for resistance to Cadre in Georgia. None were resistant! |
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| Figure 2. Susceptible AZ1 population (L) and suspect Georgia population DC4 (R) response to Cadre @ 4 oz/A + COC @ 1% v/v - 21 DAT. Both sicklepod populations had 93% fresh weight biomass reductions after the Cadre application. |
