Most SCN-resistant soybean varieties possess the same set of resistance genes from a breeding line called PI 88788. After years of repeated use, many SCN populations in Iowa have increased ability to reproduce on the common PI 88788 SCN resistance. The situation is discussed in this article as well as tips on how to check to see if it is happening in fields.
Pilot project is using APSIM model to forecast soil water-nitrogen and end-of-season corn and soybean yields in central and northwest Iowa. The June 15, 2015 forecast indicates corn yields to be near the long-term average and soybeans to be slightly below the long-term average.
Within the past week several foliar diseases have been reported in Iowa.
Japanese beetles have a wide host range, including corn and soybean. Adult emergence is starting in southern Iowa this week. Scout corn before pollination to make treatment decisions.
Annual event provides certified crop advisors and farmers with soil and water management training and an opportunity to earn CCA credits.
Scouring rush and field horsetail are two species in the Equisetum genus. Although neither weed is highly competitive with corn or soybean, over time they can get dense enough to interfere with production.
To date, there have not been many weather-related issues with nitrogen (N) management, unlike recent years. There have been a few reports of damage to corn seedlings from spring applied anhydrous ammonia. However, precipitation has kept soils moist this spring which reduced damage potential.
Corn rootworm egg hatch is happening throughout Iowa and has reached a peak in southeastern counties. Assess larval feeding activity to make future management decisions.
Iowa State University Extension and Outreach with support from the Iowa Certified Crop Advisers Board has developed an online review course for individuals taking the Iowa CCA Examination.
After 35 years, SCN continues to be the most damaging pathogen of soybeans in Iowa and the Midwest. Digging soybean roots to check for the presence of SCN females is an easy and effective way to scout for this serious pest.
Across the state of Iowa, much of the crop is reaching V5 to V6 and thoughts of an early fungicide application have probably crossed some people’s minds. This article evaluates the results of corn fungicides trials on Northern corn leaf blight (NCLB) from 2014.
On June 25, a summer field day in Kanawha, Iowa will focus on crop management, nitrogen management, and crops grown for an energy source. The event is sponsored by Iowa State University and Northern Iowa Research Farm Association.
While assessing corn stands for black cutworm and armyworm feeding, also consider assessing for wireworm activity. Wireworms injury can leave plants looking wilted or stunted, sometimes even leaving gaps in stands.
The 2015 Weed Science Field Day is scheduled for Thursday, June 25 at the Curtiss Farm at 2219 State Ave. in Ames. The self-guided field day will begin at 8:30 a.m. and is open to the public.
Common stalk borers are moving to corn in southern Iowa.
Scouting for adult true armyworms should occur in May and June in fields that are minimum, no tilled, or contains a cover crop. Feeding occurs on the lower corn leaves and moves upwards, but true armyworms do not bore into stalks.
Cool, wet conditions have led to soybean seedling damage that appears similar seedling blights such as Pythium; however, the damage may be caused by a combination of cool, wet conditions, ILeVO seed treatments, and the application of pre-emergence herbicides.
Corn planting progressed so quickly in many parts of the state that herbicide applications couldn’t keep up with the planters. Consider options before applying UAN.
Scouting for black cutworm larvae helps to determine if an insecticide application will be cost effective.
Palmer amaranth’s presence in the state is currently confirmed in five counties. Keep an eye out this summer for this weed with Iowa State’s identification resources.
Traps for black cutworm moths placed around state help determine when to scout for this corn pest.
The Iowa Monarch Conservation Consortium was established in February 2015 with a long-term goal to lead efforts in the recovery of the monarch butterfly without impacting the productivity of Iowa’s cropland.
Registration for Crop Scouting Competition for Iowa Youth on August 4, 2015, is now open. Schools, clubs, or other organizations are invited to enter their team of three to five participants.
Soybean Planting Decision Tool developed as a decision aid to help farmers and agronomists choose soybean maturity and planting dates. The tool can also be used to understand soybean growth and maturity interactions with date of planting.
The equation for calculating Iowa’s Corn Suitability Ratings (CSR) was recently updated and designated Corn Suitability Rating 2 (CSR2). The updated equation provides every user an opportunity to calculate the rating for each soil map unit identified in Iowa.
Adult alfalfa weevils begin moving as soon as temperatures exceed 48°F and begin laying eggs in alfalfa.
Each spring, adult beetles emerge from overwintering habitat and migrate to available host plants, such as alfalfa, tick trefoil and various clovers.
Starter fertilizer can be used to complement pre-plant fertilization of crops to increase yield and economic returns to production. However, its use will not be beneficial in all production conditions.
Spring is the time to pay close attention to stored grain. This year, there is more wet corn in storage, and there has been a rapid weather switch from cold to warm. Check now and often to prevent future problems.
Volunteers are needed for springtime cutworm moth data collection.
Follow the latest happenings in Iowa crop production. Blog is hosted by Iowa Farmer Today in cooperation with Iowa State's Crops Extension and Outreach team.
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Last Updated 5/27/2015