UW Soybean Plant Health
|
Virus |
Major source of inoculum |
Epidemiology |
Control |
|
Soybean mosaic virus (SMV) |
soybean seed; seed transmission 1-5% |
SMV is introduced into soybean fields as infected seed. Aphids feed on infected plants and transmit SMV to healthy plant season-long. |
Plant SMV-free seed. Variety resistance reported, but no commercial varieties are characterized for reaction to SMV. Plant early to avoid aphid vectors. |
|
Bean pod mottle virus (BPMV) |
Other legumes; seed transmission less than 1%. Over-wintered bean leaf beetles transmit BPMV in the spring. |
BPMV acquired by beetles from legume hosts and introduced into soybean fields. Transmission occurs season-long. Infected seed is a minor source of inoculum. BPMV survives in bean leaf beetle over the winter. Data from Northern states indicates over-wintered bean leaf beetles transmit BPMV without feeding on infected plants prior to invading soybean fields. |
Evidence that varieties differ in incidence of infected plants and yield in the presence of BPMV. Avoid early planting dates. Where populations are high, control early season beetles with insecticides to reduce virus transmission.
|
|
Tobacco streak virus (TSV) |
High seed transmission; forage legumes. |
Most TSV inoculum is introduced to soybean fields by seed. Thrips transmit from plant to plant during growing season. |
Plant TSV-free seed. |
|
Alfalfa mosaic virus |
Forage legumes |
Most AMV inoculum is introduced into soybean fields by insect vectors that acquire virus from forage legumes. Transmission occurs season-long. |
Resistant varieties have not been reported. Plant early to avoid aphid vectors. |
Information from this site can be copied and distributed for educational use. Please credit the source with our name and URL: University of Wisconsin-Madison, Departments of Agronomy, Entomology, and Plant Pathology at www.plantpath.wisc.edu/soyhealth.