Integrated Crop Management News

New Proposed Pesticide Applicator Certification and Training Rule from EPA - Public Comment Period Now Open

August 26, 2015

By Kristine Schaefer and Betsy Buffington, Department of Entomology

The U.S. Environmental Protection Agency has released a proposal for a new certification and training rule for pesticide applicators who apply restricted use pesticides. The current rule has been in place since 1974. Read more about New Proposed Pesticide Applicator Certification and Training Rule from EPA - Public Comment Period Now Open

Late-Season 2,4-D Treatments in Corn

August 17, 2015

Weeds that escape control not only impact crop yields but also produce seeds that contribute to future problems. While it is too late to protect crop yields from weed-related losses, in some situations the quantity of weed seed that is produced can be reduced. Historically, 2,4-D applications in corn have been been the most popular late-season treatments. The effectiveness of these applications is dependent upon the sensitivity of the weed to the herbicide and the maturity of the weed seed at the time of application. Read more about Late-Season 2,4-D Treatments in Corn

In-Season Forecast of Soil Water-Nitrogen And Corn-Soybean Yields for Central and Northwest Iowa; August 12 Forecast

August 14, 2015

For many farmers and agronomists, at this point in the growing season more thoughts move to determining realistic yield expectations. Making those yield estimates might be tough, especially for soybean, since both the corn and soybean crops are roughly halfway through grain fill. Read more about In-Season Forecast of Soil Water-Nitrogen And Corn-Soybean Yields for Central and Northwest Iowa; August 12 Forecast

Corn Rootworm Management Update

August 12, 2015

For a second year in a row, corn rootworm abundance is lower than expected in Iowa. This is due, in part, to exceptionally wet spring conditions in 2014. However, scouts and farmers have noticed rebounding populations of adult corn rootworm in the landscape now, especially noting root injury to first-year corn by northern corn rootworm. It is not too early to make management decisions for next year, with the following considerations. Read more about Corn Rootworm Management Update

In-season forecast of soil water-nitrogen and corn-soybean yields for central and northwest Iowa; an update

July 31, 2015

By Mark Licht and Sotirios Archontoulis, Department of Agronomy

The corn and soybean crops are halfway through their life cycle and are currently in the most critical phase of growth. Final yields will be determined by a combination of soil-plant processes that are highly affected by the prevailing climatic conditions in August, existing status of the soil water and nitrogen reserves, biomass production and N uptake to date, and biotic factors such as insect and disease pressure. Read more about In-season forecast of soil water-nitrogen and corn-soybean yields for central and northwest Iowa; an update

A Mix of Soybean Defoliators this Summer

July 24, 2015

Some minor defoliators have been noted in soybean this growing season, including caterpillars, beetles, and grasshoppers. Specifically, soybean defoliators observed include green cloverworm, soybean looper, alfalfa caterpillar, imported longhorn weevil, Japanese beetle, and Iowa colaspis beetle. It is important to remember that soybean can tolerate as much as 40% defoliation during vegetative growth stages, and 20% during pod-forming and pod-fillings stages before yield loss occurs. Read more about A Mix of Soybean Defoliators this Summer

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