Managing Nutrient Deficiencies
As you are getting in the fields to side dress, take the time to thoroughly scout your fields, evaluate your nutrient management programs and consider changes to maximize nutrient use. Look for areas of the field showing poor growth, poor color, leaf striping, and other potential nutrient deficiency symptoms. Soil sampling, plant sampling and tissue analysis are recommended to properly diagnose nutrient deficiencies. Sulfur (S) deficient corn has an overall yellow appearance similar to nitrogen (N) deficient corn. However S is not as mobile in the plant as N, so lower leaves show less severe deficiency symptoms than the upper leaves. The striping in S deficient corn can also be mistaken for magnesium, manganese, or zinc deficiencies. Severe lime deficiencies (low pH) may also show up and should be georeferenced for lime application in the offseason.
S deficiency versus N deficiency
Insect pests and weed control
Scout for European corn borer (ECB) in non-insect traited corn. ECB first-brood injury may now be present and treatment could be needed if 50 percent or more of stand is infested. Look for window-paning and shothole damage, and count live larvae per plant. True armyworm hatch is in full swing. In about a week, you will be able to dig up and inspect for larvae and feeding scars on the roots. We encourage you to be aggressive on weeds and address outbreaks early. When assessing plant maturity for herbicide safety, use leaf collar and plant height, as much of the corn is shorter than normal due to the early season stresses. Always read and follow label directions.
Many growers in Kentucky and southern Indiana and southern Ohio are planting double crop soybeans. The rule of thumb for double crop soybeans is to increase the seeding rate by 5 percent each week after May 20. We recommend a population of at least 220,000 plants/acre and 7.5 inch or 15 inch rows as a general guideline for double crop soybeans. Planting narrower rows decreases the days to canopy closure and increases the yield potential.
Enlist Corn Approval
We are excited for the launch of Enlist™ corn for 2018 planting! Farmers will now have a better solution for effective and easy-to-use weed control that stays on-target. More information will be coming soon on Enlist corn hybrids, available from Brodbeck Seeds.
Give us a call to discuss your specific situation,
Terry, Dan, Rod and Dennis