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Canker on stem, and inter-veinal discoloration of leaves above the canker caused by northern stem canker. Photo: Jaime Cummings/Cornell University.

Click here to see the WWNY TV 7 report by Asa Stackel on this story

As part of the Northern New York Agricultural Development Program-funded Creating a NNY Corn and Soybean Disease Diagnosis and Assessment Database project, Cornell Cooperative Extension Field Crops Specialists Mike Hunter and Kitty O’Neil scouted soybean fields in the region. The following article, which appears in the current What’s Cropping Up? newsletter from Cornell University, shares details on the discovery of this crop disease in New York state.

 

Northern Stem Canker: A New Challenge for New York Soybean Producers
by Jaime A. Cummings and Gary C. Bergstrom
Cornell University School of Integrative Plant Science, Plant Pathology and Plant-Microbe Biology Section

As part of 2014 research projects supported by the New York Soybean Check-off Program and the Northern New York Agricultural Development Program, participating Cornell Cooperative Extension/CCE Educators have been scouting soybean production fields, recording observations on diseases, and sending plant samples to the Field Crop Pathology Laboratory at Cornell University for positive diagnosis of disease problems. A serious disease called ‘northern stem canker’ was confirmed for the first time in New York soybean fields. It showed up in samples from soybean fields in Jefferson, Livingston, Niagara, Ontario, Orleans, Seneca, and Wayne Counties collected by CCE Educators Mike Hunter, Mike Stanyard and Bill Verbeten.

The disease was diagnosed at Cornell based on characteristic symptoms and the laboratory isolation of the causal fungus and confirmation of a portion of its DNA sequence.

Soybeans are also being scouted in other areas of New York in 2014, but so far this disease has not been detected outside of the seven counties mentioned above.

Northern stem canker (NSC) is caused by the fungus Diaporthe phaseolorum var. caulivora and differs from a related fungus, Diaporthe phaseolorum var. meridionalis, that causes southern stem canker throughout the southern U.S. NSC occurs in most Midwestern states and in Ontario, but this is, to our knowledge, the first confirmation in New York or the northeastern U.S. Reported yield losses in the Midwest have ranged from minor to in excess of 50%, so the presence of the pathogen is considered a significant factor for soybean production.

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Click here for NNYADP press release

 

Over the past couple of weeks, Cornell Cooperative Extension NNY Regional Field Crops specialists Mike Hunter and Kitty O’Neil have discovered numerous soybean fields that are affected by white mold (or Sclerotinia Stem Rot) throughout Northern NY.

White mold is usually not a major problem in in the North Country, however, this year seems to be an exception.

White mold infections are favored by cool, cloudy, wet and humid weather conditions at soybean flowering. This disease is more likely to be found in fields that have thick stands with high populations planted in narrow rows. It typically does not appear in small plants at low populations. It is no surprise that we are seeing higher levels of white mold in soybeans this year.

Read more about coping with white mold, August 2014

Northern New York – On-farm research trials funded by the farmer-driven Northern New York Agricultural Development Program shows some NNY farms have achieved notably high corn yields. These gains prompted farmers to want to know if the Cornell University nitrogen fertilizer and manure application recommendations derived from corn yield potential calculations need to be revised.

Twelve Northern New York farms teamed with Cornell University researchers, Cornell Cooperative Extension field crop specialists and regional crop consultants to investigate whether higher crop productivity means more nitrogen needs to be supplied to replace that taken up by the corn or are new corn varieties simply able to make better use of the nitrogen already in the soil?

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Click here for research report

A Soil Health Workshop will be held on Friday, August 22nd, 1-5pm, at the Logue Farms, 8 Smith Road, Chateaugay, NY. Agenda will focus on cover crops and tillage with short educational sessions, a farmer discussion panel and tillage equipment demonstrations.

Attendance is free, but please register with Chastity Miller at 518-483-4061 x110, cmiller@fcswcd.org in advance.

The field day is sponsored by the Franklin County and NYS Soil and Water Conservation offices, Franklin and Clinton County NRCS offices, Franklin County Farm Services Agency, and Cornell Cooperative Extension.

Click here to read “Soil Health Explained” by CCE NNY Field Crops and Soils Specialist Kitty O’Neil.

Cornell Cooperative Extension is sponsoring two regional field discussions for Northern New York horticultural growers: one on July 28 in Willsboro and one on July 29 in Canton. The events are free-but-registration-required evening educational opportunities.

Each program will run from 6pm to 8pm with a picnic supper, farm tour, and discussion of vegetable production projects focused on season extension, inter-row cover crops, reduced zone tillage, crop pests: leek moth and spotted wing drosophila, and more.

Click here for event details and registration