There are several different chemical application options for plant protection for your corn crops such as glyphosate in RR corn. Important to the chemical selection process are pre-plant and post-plant options. They include PPI (pre-plant incorporate), pre-emergence, pre-emergence followed by post-emergence, total post-emergence. Here are a few recommendations for corn crop protection.
Remember, post sprays are weed sensitive and only control certain species of weeds. Applying post-emergence can allow the option to add a foliar feed, fungicide, insecticide, sugar, or plant growth regulator. Most all post-emergence sprays require an adjuvant and nitrogen source, or oil of some combination to work most efficiently. Remember to always read and follow label instructions.
When growing soybeans it is very important to start clean and stay clean when it comes to weeds. For any no-till fields a fall burn down over corn stalks with products such as Canopy, Valor, Autumn will help remove winter annuals. A burn down will also keep the field weed free longer into the season to delay the glyphosate application.
In the spring, if weather permits, an early burn down with some residual such as Canopy, Envive, Valor, Gangster is highly recommended and will help pro-long the second glyphosate treatment. If weather does not permit an early burn down, than planting the beans timely and making a burn down application shortly after will insure a clean start. Remember to always read and follow label instructions
The newest herbicide sprays are specially designed to be safe for the wheat plant. Some Affinity Broadspec, Huskie, or Widemath can be applied through the jointing stage of growth development. It is important to know that just because they can be applied to a larger wheat crop does not mean they can kill larger weeds when applied before the jointing stage. Most chemicals require adding only minimal amounts of nitrogen (28%) to their chemistry, Peak, however, is one chemical that can use 28% as the carrier, but you MUST follow the wheat with corn the next year. Remember to always read and follow label instructions.
Fungicides are to protect the wheat from diseases and help them to be an overall healthier plant. It may be a good practice to use an insecticide to prevent certain pests during the growing season. Remember, Lorsban cannot be used in Michigan on wheat. All of the insecticides have PHI (per harvest interval) days, so we need to be aware of these restrictions and not spray too late. Remember to always read and follow label instructions.