Recently there has been a number of calls and samples submitted to the Purdue Plant Pest Diagnostic Lab (PPDL) worried that they have frogeye on soybean. I know due to the issues we saw at the end of last season there is a bit of concern about managing frogeye.
Bill Johnson
The Purdue Weed Science team is hosting an educational field day for farmers, agricultural industry professionals, Extension educators, consultants and others who apply herbicides.
The weed science program at Purdue University is searching for a research associate to provide support and leadership for our Field and greenhouse research program. See the link below or contact Dr. Bill Johnson if you have questions regarding the position. Job Summary Responsibilities for this position will include but are not limited to: Planning, directing and conducting field, greenhouse and laboratory experiments related to weed management in agronomic crops; including planning experiments, planting and managing the growth of plants, pesticide applications, collection of data and harvesting Working in conjunction with Purdue research personnel in weed science, agronomy and plant pathology, researchers at other universities and at various companies that fund some of this research Data management and analysis Preparing reports that will be submitted to a variety of groups including funding agencies and private industry Preparing manuscripts for publication in peer-reviewed journals and other presentations to the scientific community Facilitating[Read More…]
Our rainy wet weather conditions have certainly caused a lot of delays in field operations this spring. One of these challenges we face in a spring like this one is the process of getting crops terminated and summer annual crops like corn and soybean planted in fields where cover crops have grown somewhat large.
There are many no-till fields across Indiana that have either not been burned down or those that will need to be sprayed again because of wet weather and planting delays.
Adoption of Xtend soybeans is expected to reach 70-80% of the soybean acres in the U.S. in 2019. The approval of Enlist E3 soybean imports by China and the Philippines earlier this year has allowed for full commercialization in the U.S. and provided farmers with another auxin herbicide (2,4-D choline) in their soybean weed management programs.
Every spring we receive several calls and e-mails about a certain 3-foot tall weed with yellow flowers. This year, cressleaf groundsel is slower to develop, presumably because of the extended cold and wet weather which has not allowed much field work (spring tillage or burndowns for no-till) to proceed.
We have received a few questions this winter and spring about ammonium sulfate (AMS) rates to use with postemergence herbicides and how much is needed to overcome hard water issues.
Wild garlic (Allium vineale) has shown up in many Indiana no-till corn and soybean fields this spring especially, in southern Indiana. Wild garlic is most troublesome in wheat, where aerial bulblets contaminate harvested grain and impart the garlic flavor into processed products such as wheat flower. Infestations in corn and soybean fields have less adverse effects on the crop, but can spread quickly across fields and are difficult to control with typical burndown treatments of glyphosate and 2,4-D. Management of wild garlic must occur early in the spring as this perennial will quickly become reproductive in mid to late spring. Wild garlic produces aerial bulblets and begins to senesce in late spring to early summer. As with all weeds, wild garlic management needs to occur prior to seed or in this case bulblet production to reduce future infestations. Ideally herbicide applications should take place in early April when the wild[Read More…]
This spring we have received a number of questions regarding the use of glyphosate-based burndown herbicides programs with ATS (ammonium thiosulfate). Increased use of ATS is being driven by the fact that sulfur deficiency symptoms are showing up on fields with low sulfur soil test levels.
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