It’s time to turn thoughts towards nematodes that feed on corn! It is very common for Iowa corn fields to have several different species of plant-parasitic nematodes present at low numbers. It’s only when numbers are present at damaging levels that symptoms of injury will appear. This article discusses when and how to sample for plant-parasitic nematodes that can damage corn.
Now more than ever, farmers need to know if their fields are infested with SCN and at what levels, especially for fields in which soybeans will be grown in 2018. This article explains why and how to determine SCN numbers in fields.
Recently there have been many questions about how to check fields for plant-parasitic nematodes that can damage corn. Unfortunately, the situation cannot be accurately assessed with samples collected in the fall. This article discusses when and how to sample for plant-parasitic nematodes that feed on corn.
The soybean cyst nematode (SCN) is capable of causing serious yield loss on soybeans every year. Back in the “good ole days,” a farmer was “good to go” with SCN management if he or she knew what fields were infested with the nematode and then grew SCN-resistant soybean varieties in rotation with the nonhost crop corn. Nowadays, things are more complicated. SCN numbers may be building up and causing increased yield loss and the buildup can go unrecognized because a soybean crop often does not appear stressed above ground, even though yield loss is occurring. This article explains why this SCN numbers might be building up in your fields and how to check.
A simple but potentially valuable spring task to consider is sampling fields for the soybean cyst nematode. And since we are heading into the cropping season, it makes sense that attention be given to those fields in which soybeans will be grown in 2016.
By Greg Tylka, Department of Plant Pathology and Microbiology
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.
Recent research results indicate that V6 growth stage is a good time to collect samples to check for damaging levels of plant-parasitic nematodes that feed on corn. Useful tips for sampling for these pathogens of corn are given in this article.
