What is in this article?:
- Mid-South soybean harvest shows surprising yields
- Pests and disease
- While not unscathed, Mid-South soybeans appear to have escaped the ravages of drought experienced in the Midwest.
- “Overall, harvest is going great” says Ronnie Levy, LSU AgCenter soybean specialist.“We’re close to 75 or 80 percent done.
- "It appears the Arkansas soybean crop will fare pretty well. Right now, the USDA has us tying the record for state average at 39 bushels per acre." -- Jeremy Ross, Extension soybean specialist.
Pests and disease
Another issue arose late in the season with Asian soybean rust moving through the Mid-South.
The rust caused “minimal impact” on Louisiana yields, says Levy. “Most of the rust came in late and didn’t do much yield damage as far as we can tell. There weren’t any fields devastated by rust.
“What we had problems with was cercospora purple seed stain. With the high market prices and the potential for excellent yields, most folks applied at least one fungicide application. Some put out a fungicide at R-1, some at R-3 and R-5.
“A lot of the early-planted soybeans in north Louisiana has very little incidence of cercospora. In the south -- probably from the stress and injury associated with Hurricane Isaac -- we saw a significant amount of cercospora show up in the later soybeans.”
Soybean rust began to be picked up in southern Arkansas several months ago. But until Isaac stormed through the state, “it was only at low levels and wasn’t moving much,” says Ross. However, “the week or 10 days of cloudy, rainy weather” following Isaac “got the rust going in some of the late beans. The good thing is Isaac happened late enough that only a few fields have had to be treated for rust.
“Four more counties (Craighead, Greene, Jackson and Poinsett) were just categorized ‘hot’ for rust in the state. Right now, we’re sitting at 80 percent of the crop dropping leaves. So, most of the crop will outrun the rust. Some guys – especially those who planted beans behind corn – will probably have to spray.”
The biggest late-season thing producers have had to deal with, says Ross, is the rise of strobilurin-resistant frogeye. “That’s going to mean changing up chemistries in 2013. We’re going to really watch that next year when disease season rolls around.”
Worries about resistant frogeye are also evident in Mississippi. On October 5, Tom Allen, state Extension plant pathologist, wrote “I’ve observed frogeye leaf spot in almost every soybean field I’ve stepped in this season regardless of the county.” (For Allen’s full report, see here).
Note: Resistant frogeye is expected to be a topic of discussion at the Dec. 4 Arkansas Soybean Research Conference at the East Arkansas Community College in Forrest City. For more information, e-mail firstname.lastname@example.org.
What about pests?
“The red-banded stink bugs are a monster for us,” says Levy. “Last winter was warm and the conditions were favorable for them. There was the potential for a lot of stink bug injury and we spent a lot of money controlling them.”
Arkansashad to deal with bollworm/corn earworm early on. That followed a “bad trouble with them in 2011,” says Ross. “But we never really got the second and third flights early in the season. The heat may have prevented that.”