|
|
| |
| |
Illinois traps rust-like spores
in four counties this week
|
8/19/2005 11:15 p.m. CDT -- The twice-weekly monitoring of Illinois spore traps turned up soybean rust-like spores in four counties this week: Alexander, Warren, Massac and St. Clair. State specialists continue to discourage Illinois growers from spraying for rust.
Warren County (two spores in trap), on the Mississippi in west-central Illinois, remains the northern-most county in the United States reporting rust-like spores captured in a spore trap. This time around, the Alexander trap had one spore, Massac two spores and St. Clair County, five spores.
Linda Kull, with the National Soybean Research Laboratory at the University of Illinois, continued to emphasize in yesterday's Illinois commentary that "as of August 19, 2005, there are no observations of soybean rust on soybean, kudzu, or other potential hosts in Illinois."
With no rust observed in Illinois or any of the neighboring states, Kull's report said, "Spraying fungicides for soybean rust management in Illinois is NOT recommended at this time."
The commentary continued with this perspective on finding rust-like spores:
"These 'rust-like' spores look similar to many kinds of rusts from various hosts, however these low numbers of spores in traps cannot be positively identified with visual, molecular or culturing techniques. Therefore, it is not possible to confirm whether these spores are actually soybean rust spores. Scouting in these counties has increased.
"Similarly, in Kentucky, Tennessee and Missouri, 'rust-like' spores were reported in several traps, however there is no evidence that any soybean plants or alternative hosts in those states have been infected with soybean rust, even with very intensive scouting efforts."
Most of Illinois' sentinel plots are approaching R6, Kull said. Double-crop beans are generally in the late vegetative stages to the early reproductive stages.
Source: Illinois state commentary 8/19/2005 at www.sbrusa.net.
For an easy way to stay informed, sign up for the weekly Bulletin e-mail newsletter from www.StopSoybeanRust.com. You also will receive our RUST FLASH e-mails alerting you to important breaking news as soon as it occurs. All are archived in Bulletins.
|
| |
|
|
|
