2025
Evaluation of seed treatments to manage combined infections of interveinal chlorosis causing pathogens and soybean cyst nematodes
Contributor/Checkoff:
Category:
Sustainable Production
Keywords:
NematodePest
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Venkata Chapara, North Dakota State University-North Central Research Extension Center
Co-Principal Investigators:
Project Code:
NDSC_2025_Agronomy 32
Contributing Organization (Checkoff):
Institution Funded:
Brief Project Summary:
The PI identified interveinal chlorosis (yellowing between leaf veins) and leaf necrosis (tissue death) of soybean foliage last summer on a particular soybean variety at Langdon Research Extension Center (LREC). Literature shows that there are three different soil-borne pathogens can cause interveinal chlorosis. Further, the field has a soybean cyst nematode (SCN) history. SCN, together with some soil-borne pathogens, can cause substantial yield losses.
Information And Results
Project Summary

Interveinal chlorosis (yellowing between leaf veins) and leaf necrosis (tissue death) of soybean foliage with Soybean Cyst Nematode were reported to cause significant yield losses in soybeans around the world. Similar infections together with SCN were identified this summer on a soybean variety at Langdon Research Extension Center (LREC). Most of the samples were identified as Brown Stem Rot (BSR) infections through molecular confirmation. However, a report of Sudden Death Syndrome (SDS) caused by Fusarium virguliforme was reported in 2018 in the County. The symptoms of interveinal chlorosis and tissue death resulted in the decline of the crop growth and drastic reduction in the yield was recorded at LREC this year. The soil samples collected from the same field were sent to Agvise were positive to Soybean Cyst Nematode (SCN) presence. There are two more pathogens look a likes known to infect soybean and cause interveinal chlorosis and tissue death as BSR pathogen. The current objectives were to identify the pathogens that are responsible for the disease that is causing interveinal chlorosis and tissue death along with BSR pathogens in the infected ground and to evaluate various seed treatments to manage the disease associated with Soybean Cyst Nematode.

Project Objectives

To evaluate seed treatments to manage the disease associated with Soybean Cyst Nematode and to identify the pathogens that are responsible for the disease that is causing interveinal chlorosis and decline in yield along with soybean Cyst Nematode

Project Deliverables

Correct identification of the disease and its causing pathogen will help in designing preventative measures to manage the disease and the evaluation of seed treatments will help in identifying the best management option before the situation gets out of hand of the grower. The results can be delivered to the growers and the other stake holders by initiating outreach activities throughout the state of North Dakota.

Progress Of Work

Final Project Results

Benefit To Soybean Farmers

This research will help the soybean farmer identify the exact cause of interveinal chlorosis and the impact of soybean cyst nematode on soybeans. The seed treatment objective will help manage the diseases before the pathogens can cause severe yield losses..

The United Soybean Research Retention policy will display final reports with the project once completed but working files will be purged after three years. And financial information after seven years. All pertinent information is in the final report or if you want more information, please contact the project lead at your state soybean organization or principal investigator listed on the project.