Southeast Minnesota crops are progressing in spite of a back and forth weather pattern. It’s gone from hot to cool and dry to wet multiple times this spring, and, for the most part, the crops have gotten enough water at the right times to continue development.
The corn crop is coming into the tasseling stage, a critical time in the crops’ development. Fillmore and Houston County Extension Agent Michael Cruse said the ten days before tasseling and the two-week period afterward are when rain becomes critical to continued development for southeast Minnesota crops.
“The corn is working on set and going through the reproductive cycle,” said Cruse, “and it’s important that we get rain. If the water gets limited by dry weather during that period, it will limit the crops’ final yield numbers.”
There is some extra water in the soil profile from rainfall this spring and early summer, which Cruse says doesn’t hurt at all. However, after talking with several farmers in the area, Cruse said several had to go into their fields when it was probably too wet. The farmers told Cruse they were concerned about compaction in their sidewalls when they were planting.
“That means the roots weren’t able to grow out and down into the soil like they typically do,” Cruse said, “so even though we do have water in the soil profile, if people had that type of compaction issue in their fields, the roots won’t get down to the water that’s there. It’s possible that water will be limited for the crop, even though there’s water in the soil profile.”
Though we did get plenty of rain at times this spring, Cruse said it messed up a lot of the timing for getting out in soybean fields and spraying herbicides. There are soybean fields in southeast Minnesota that have weed infestations that they couldn’t get into and spray. Farmers had to try and hit ragweed when it was 2 – 2.5 feet tall.
“They had to put something down that not only burned the weeds but hit the soybean plant as well,” he said. “That’s okay, but all you really did was burn the leaves on the weeds. Most of the time, you won’t kill them by doing that. If you did knock the ragweed back a little, they’re greening up and shooting out more buds. They’re not really under control and still growing.”
Cruse’s extension colleagues are telling stories about soybean fields in their areas that were incorrectly sprayed. Farmers sprayed the incorrect product on soybean fields that aren’t resistant to that specific chemical. There have actually been soybean fields in Minnesota that were completely killed off.
“There were some fields that may not have been completely killed off,” Cruse added. “But beyond even that, the other concern is are we getting enough growing degree days? We’re actually pretty close to average. We may be a little behind the last couple of years, but we’re close to average.”
Similar to corn and soybeans, this year’s alfalfa crop is a mixed bag, with some good and some not-so-good results. The biggest comment that Cruse is getting from farmers is problems dealing with winterkill.
“I’ve seen plenty of it that’s down and I’ve seen plenty that’s ready,” he said. “I’ve seen people that are constantly cutting alfalfa. But, other fields are slower than others, likely due in part to winterkill. It’s all over the board.”
Disease pressure has been somewhat limited so far in southeast Minnesota crops, but Cruse said they’re likely going to show up in the immediate future. This is the time of year to be scouting for diseases like Northern Corn Blight.
As far as pest pressure, Cruse made an interesting point, asking, “How many mosquitoes have you seen this year?” What makes it even stranger is we’ve had plenty of the right conditions to have a lot of mosquitoes, but they just aren’t there in numbers we’re used to.
“We may have an infestation here and there,” Cruse said, “but I haven’t heard anything that’s overly concerning about southeast Minnesota crops, at least up to this point.”