Links to these articles are strongly encouraged. Articles may be republished without further permission if published as written and if credit is given to the author, Integrated Crop Management News, and Iowa State University Extension and Outreach. If articles are used in any other manner, permission from the author is required.
By Jim Fawcett, ISU Extension and Outreach Field Agronomist
Certified crop advisers (CCAs) can earn 5 hours of credit (3.5 hours in soil and water management, 1.0 in crop management, and 0.5 in nutrient management) by attending a special CCA morning session, followed by the afternoon 25th anniversary celebration & spring field day tour at the Southeast Iowa Research and Demonstration Farm near Crawfordsville on Thursday, June 21.
Determining whether plant-parasitic nematodes are present in high enough numbers to cause damage and yield loss to corn is difficult. Multiple nematode species are usually present in a field, and the number of nematodes necessary to cause damage can vary from field to field. A new approach has been developed to assess the overall likelihood of damage occurring based on the nematode species and numbers present and the conditions of the field. This article explains the basics of the new system.
Corn producers might see yellowing leaves above the canopy. The symptom is not unusual in fast-growing corn; leaves should unfurl and turn turn green within a few days.
Crop consultants in southwest Iowa have reported finding twospotted spider mites this week. Scouting for initial infestations is important to avoid yield loss. Foliar insecticide treatments should be made to fields before prolonged spider mite feeding causes yellowing or leaf drop
Iowa Learning Farms (ILF) will host a field day (2012 Field Day Guide) at the Mark Mueller farm near Waverly on Thursday, June 14, beginning at 11 a.m. the field day will focus on no-till conservation farming and crop residue management for optimum results.
Some corn and soybean fields are showing potassium (K) deficiency symptoms, most likely caused by dry topsoil due to low rainfall during late May and early June. Learn more about what can be done for the current crop.
The soybean cyst nematode (SCN) continues to cause serious soybean yield losses in Iowa and throughout the Midwest. It is easy to identify SCN infestations in the field during the growing season by checking soybean roots for the presence of SCN females. This article discusses the benefits of checking soybean roots in fields planted with susceptible and SCN-resistant soybean varieties.
The 2012 Iowa State University Weed Science Field Day is set for June 28 in Ames.
Iowa fields have significant volunteer corn problems this spring. If dry conditions continue, farmers will need to adjust combines to minimize harvest losses.
Iowa's mild winter has accelerated insect development across the state. Recent sightings include soybean aphids, Japanese beeetle adults, black cutworm, European corn borers, and corn earworm.
