Integrated Crop Management News

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Spring Seedling Sampling

May 3, 2016
Spring Seedlings for testing

Seedling diseases could be an obstacle for farmers this year with the early planting of corn and soybean. While we all hope that seedling diseases will be a small consideration, it is important to be ready for them. It is also important to know how to sample for them. Read more about Spring Seedling Sampling

Black Cutworm Scouting Advisory 2016

May 3, 2016
BCW Cutting Estimates 2016

The black cutworm (BCW) is a migratory pest that cuts and feeds on early vegetative-stage corn. Black cutworm moths arrive in Iowa with spring storms each year. These moths lay eggs in and around fields and the emerging BCW larvae cut seedling corn. The sporadic nature of this pest makes scouting essential to determine if management is needed. Scouting for BCW larvae helps to determine if an insecticide application will be cost effective. Read more about Black Cutworm Scouting Advisory 2016

Look for Seedcorn Maggot in Corn and Soybean

April 13, 2016
Seedcorn maggot and larva

Seedcorn maggot is a seed and seedling pest of corn and soybean. Plant injury is especially prevalent during cool and wet springs. The larvae, or maggots, feed on germinating corn and soybean seeds or seedlings (Photo 1). They can feed on the embryo, delay development or kill the plant. Infestations tend to be field-wide instead of grouped together like for many other pests. To confirm seedcorn maggot injury, check field areas with stand loss and look for maggots, pupae and damaged seeds (e.g., hollowed out seeds or poorly developing seedlings). Read more about Look for Seedcorn Maggot in Corn and Soybean

Soil Health Benefits for Sustaining Crop Production

April 13, 2016
No-till corn system

The benefits of healthy soil in sustaining crop production are most evident when growing conditions are less than ideal. Healthy soils increase the capacity of crops to withstand weather variability, including short term extreme precipitation events and intra-seasonal drought. The extreme drought in 2012 resulted in variable yield reduction to corn and soybean production in Iowa with the worst impact on fields with conventional tillage systems (i.e., chisel plow, deep ripping, etc.). Read more about Soil Health Benefits for Sustaining Crop Production

Cold Temperatures and Burndown Herbicides

April 11, 2016
Frost damaged giant ragweed seedlings

The weather forecast appears to be favorable for field activities so people will be anxious to get into the field. A concern for many will be the effect of the widespread freeze on the performance of burndown herbicides. Unfortunately, there is no simple blanket statement that can be made since the plant response will vary depending on weed species, weed size, and the herbicides used. Read more about Cold Temperatures and Burndown Herbicides

2015 Evaluation of Commercial Seed Treatments on Soybean at Three Locations in Iowa

April 4, 2016
ICM seed treatments tables

The percentage of soybean treated with a seed treatment has increased greatly in recent years. Over the past five growing season, the Robertson lab has evaluated the effect of commercial seed treatments on stand count, disease incidence and severity, and yield of soybean with funding provided by Iowa Soybean Association. Read more about 2015 Evaluation of Commercial Seed Treatments on Soybean at Three Locations in Iowa

Fine-Tune Oat Seeding Rate This Spring

March 28, 2016
Oat Seedlings in the field

It’s time to plant small grains. When planting oats, spring wheat, and barley, farmers typically plant two to three bushels of small grains per acre, but there is a better way to optimize plant populations and grain yields. Farmers calculate corn and soybean rates by seed count and should do the same for small grains. Several factors affect final plant stands at oat harvest, including: desired final plant stand, number of oat seeds per pound, germination rate in the seed lot, and expected stand loss from irregular seeding depth or early plant death. Read more about Fine-Tune Oat Seeding Rate This Spring