In 2019 we ran calls on about 40 fields where producers were disappointed with their Palmer amaranth control from applications of Engenia or XtendiMax. We collected Palmer amaranth seed last fall from 22 of these fields where it looked like the Palmer had survived timely application(s) of dicamba. Subsequently, we were able to get a critical mass of seed to germinate from 12 of these collections in order to evaluate plants for possible dicamba tolerance in three separate greenhouse screens conducted throughout the winter months. Continue reading
Rain, rain, rain! We are behind the burndown pace of most Tennessee springs where at least some would have burndown applications applied by this time. This has resulted in a flurry of calls on options. Continue reading
Below is a YouTube video from Dr. Nick Seiter from the University of Illinois that does a good job of reviewing this biology and management of Dectes stem borer in soybeans. Dr. Seiter and I are on the same page, and this video compliments my recent article about Dectes stem borer.
For the last two decades dicamba has been used extensively as a pre plant burndown on almost all Tennessee cotton and soybean acres. It was often used at 8 to 12 oz/A of a Clarity-type product 14 days before planting. I know it has become tradition to use it in this fashion, but I believe this should be changed for three reasons. Continue reading
Over the years and several times in the last month, I’ve had folks tell me how bad Dectes stem borer hurt their soybean yields. Almost without exception, they describe low yielding spots in their fields and/or weak, dying, and dead plants … and they found a lot of Dectes larvae in the stems. They are convinced the two are related and look at me like I’m crazy when I suggest they are not. Here’s what I know. Don’t forget to look at the photos included at the bottom of this article!
What do we know about the biology and pest status of the Dectes stem borer? Continue reading
Information related to row crop production will be shared during two UT Extension sponsored regional grain and soybean conferences on Tuesday, Feb 4th and Thursday, Feb 6th.
The 2020 version of PB 1768, Insect Management Recommendations for Field Crops (and pasture), is now available. The guide has gone through substantial revision this year and closely matches the content on the mobile friendly Disease and Insect Field Guides at https://guide.utcrops.com/. Hard copies will be available soon and distributed through county extension offices and at various educational meetings.