Soybean puckering and dwarfing
This article was originally published on July 20, 2012 and expired on August 30, 2012. It is provided here for archival purposes and may contain dated information.
A recent sample received at the University of
Illinois Plant Clinic presented confusing symptomology, according to University
of Illinois Plant Diagnostic Clinic and Integrated Pest Management coordinator
New leaves were puckered; older leaves were just a bit off
color. The sample plant was not stunted, although the client reported that
there were stunted plants in that area of the field.
Causes of puckering include herbicide drift or carryover,
heat, and leaf hoppers. None of these possibilities seemed to explain the
"We had the sample tested for virus infection," said
Bissonnette. The sample was positive for a virus that is rather new to this
area, soybean dwarf virus (SbDV).
Soybean dwarf virus has a serious economic impact in Japan.
Symptoms are dwarfing and reduced seed set of the soybean plant, which can be
severe if the plant is infected in the seedling stage.
"Our sample was not severely dwarfed, unlike other plants in
the field, most likely because it was infected later in season," Bissonnette
University of Illinois USDA-Agricultural Research Service
virologist Les Domier, who does research on the virus, first reported SbDV
disease in Illinois in the 2006 soybean crop. Prior to that, SbDV was known to
be endemic in red and white clover but had been detected in soybean only in Wisconsin
In the forage legumes, the virus is transmitted by several
colonizing aphid species. Recent research on SbDV was concerned with whether
soybean aphid, a soybean colonizing aphid, would be a good vector of SbDV and,
if that were the case, would the incidence of SbDV increase in Illinois fields?
The answer is – probably not. A multistate study looking at
transmission of SbDV by various aphids found that soybean aphid is an
inefficient vector of the virus. However, the authors concluded that, although
transmission of SbDV by the soybean aphid is very inefficient, the large
populations of this insect that develop on soybean may have the potential to
produce serious SbDV-induced yield losses.
What can be done about the disease?
"We have no recommendations for control," Bissonnette said.
"Dr. Domier notes that resistance to SbDV has not been found in soybean.
However, some cultivars show only mild symptoms when infected by the virus."
Watch for SbDV when scouting in soybean fields, Bissonnette
"Diseases can and do change in their distribution more
frequently than we like," she noted. "It may surprise you to know that SbDV is
actually more common in Illinois than our old friend soybean mosaic virus."
Full article with figure available at https://shared.aces.illinois.edu/content/soybean-puckering-and-dwarfing
Source: Suzanne Bissonnette, Plant Diagnostic Clinic and IPM coordinator, email@example.com
Pull date: August 30, 2012