Bean pod mottle virus: A Threat to U.S. Soybean Production

Evaluation of Management Strategies for Bean Leaf Beetles (Coleoptera: Chrysomelidae) and Bean Pod Mottle Virus (Comoviridae) in Soybean

“…As such, the suppression of vectors by chemicals should work to reduce BPMV much like chemical controls have worked in other systems with colonizing insect vectors (Perring et al 1999). Although the F 2 population likely is not an important vector for BPMV (Giesler et al 2002), the F 1 population is a secondary source and dispersal agent. The fact that the suppression of vectors (F 0 or F 1 populations) did not consistently suppress BPMV in this study may indicate underappreciated behavioral effects for some chemical applications, e.g., increased movement as suggested by Pedersen et al (2007).…”

“…Management actions that affect a vector population can impact their transmissible agents (Perring et al 1999); however, the affects of C. trifucata management on BPMV transmission are not fully understood. For example, preliminary studies indicate that early-planted soybean may have increased BPMV incidence (Giesler et al 2002); however, in a 3-yr study, Krell et al (2005) found that delayed soybean planting inconsistently reduced the seed-borne incidence of BPMV.…”

“…The adult bean leaf beetle, Cerotoma trifurcata Fö rster (Coleoptera: Chrysomelidae), causes economic damage to soybean, Glycine max (L.) Merr., by feeding on leaves, stems, and pods Pedigo 1992a, b, Pedigo andZeiss 1996) and its pest status has been elevated further by its transmission of Bean pod mottle virus (Comoviridae) (BPMV) (Giesler et al 2002). This virus reduces soybean yield (Horn et al 1973, Hopkins andMueller 1984) and grain quality ).…”

“…Although transmitted by several species of Coleoptera (Horn et al 1970, Patel and Pitre 1971, Fulton and Scott 1974, Mabry et al 2003, Werner et al 2003, BPMV is most efÞciently transmitted by C. trifurcata, a species whose populations have undergone dramatic increases in abundance in recent years (Giesler et al 2002). Recently, annual peak abundance at a single location in Iowa reached Ϸ96 times the 1996 level (Bradshaw and Rice 2003).…”

Soybean mosaic virus Infection and Helper Component-protease Enhance Accumulation of Bean pod mottle virus-Specific siRNAs

“…The P19 protein of Tomato bushy stunt virus (TBSV) suppresses silencing by sequestering 21-nt siRNAs and preventing their incorporation into RISCs Silhavy et al, 2002). However, some viruses, like Bean pod mottle virus (BPMV), a common viral pathogen of soybean (Giesler et al, 2002), do not express detectable levels of suppressive activities (Gu and Ghabrial, 2005). As a consequence, BPMV titers are high and symptoms are severe early in infection, but virus titers and symptom severity decline as BPMV RNAs are degraded by PTGS.…”