Statewide evaluation of foliar fungicides on soybeans in 2023 in Iowa
By Nabin K. Dangal, Edgar Nieto, Stith Wiggs, Jose Gonzalez-Acuna, and Daren S. Mueller.
By Nabin K. Dangal, Edgar Nieto, Stith Wiggs, Jose Gonzalez-Acuna, and Daren S. Mueller.
Iowa State Extension recently released a newly updated list of soybean varieties that are resistant to the soybean cyst nematode (SCN). The publication contains information on 87 varieties with SCN resistance from the breeding line Peking. Varieties with Peking resistance often will provide greater control of SCN and higher yields in SCN-infested fields that have had varieties with PI 88788 SCN grown for decades. This article contains tables that provide a quick look at the brands, names, and relative maturities of the Peking varieties.
Each year, Iowa State University prepares a list of soybean varieties available in Iowa that are resistant to the soybean cyst nematode (SCN). The list was updated in October 2023 and the publication is now available online. There are 48 more varieties in the 2023 list than in 2022 including 40 more with Peking SCN resistance. Varieties with Peking resistance are highly useful for managing SCN because they limit reproduction of most Iowa SCN populations and protect against yield loss more effectively than varieties with the common PI 88788 resistance.
The soybean cyst nematode (SCN) is estimated to cost soybean producers $1.5 billion annually in North America. A new online resource called the SCN Profit Checker, from the SCN Coalition, uses data collected from Iowa State University research to estimate percent yield loss from SCN and the cost of yield reductions in dollars lost in individual farmer fields. This article explains more about this resource, where to access it and how to use it.
The soybean cyst nematode (SCN) is the most damaging pathogen of soybeans in Iowa and the entire US, costing producers $1.5 billion annually. The pathogen warrants more attention and effort to detect and manage than often is given. It is easily detected and quantified from soil samples. An optimum time to collect soil samples from fields is immediately after corn and soybean harvest are complete. This article explains why and how to collect and submit soil samples for SCN testing.
An updated Corn and Soybean Field Guide is now available from Iowa State University Extension and Outreach.
This 236-page pocket-sized guide (3-3/4" x 6") combines corn and soybean integrated pest management information in one publication for ease of use by corn and soybean farmers, agronomists, and crop scouts. It has newly updated text and images and provides tools for identifying insects, diseases, and disorders of corn and soybean in the Midwest. The guide also contains information on developmental stages, pesticide decisions, and other production-related topics.
I have had several calls and emails about corn turning black – particularly the husks and leaf tissues. Walking in these fields turn a white shirt black quickly, and not surprisingly, combining this blackened corn can be very dirty.
Harvest is approaching too quickly this fall. Between the dry summer and the spurts of hot weather in August and early September, crop standability is degrading quickly. This blog will go over some potential reasons for standability issues and ways to assess and prioritize fields for harvest.
The crop just ran out of gas
Field crop health matters throughout the entire growing season. The types of diseases on crops depend on the point in the growing season and the environmental conditions. Many later-season diseases result from soilborne pathogens over which in-season fungicide applications have no control. Most commercial varieties will have ratings for the performance of their selections against various diseases, including those caused by soilborne pathogens.