End-of-Season Green Stems in Soybeans Could Delay 2009 Harvest Even Further

Farmers should consider green stem implications when selecting soybean fungicides

August 7, 2009

WALNUT CREEK, Calif. (August 7, 2009)—Many are concerned that soybean farmers who are already frustrated over delayed plantings this spring could face another significant delay this season: unwanted green stems at harvest.

The green stem phenomenon—a condition that occurs when soybeans don’t mature on schedule, leaving green stems during peak harvest timings—could further delay this year’s soybean harvest.

University of Georgia plant pathologist Dr. Bob Kemerait said, "Green stems could be a more important consideration with a later-planted crop than a crop that was planted on time. When farmers are already pressed for time in a delayed season, they may be frustrated at the end of the season when having to deal with excess foliage.”

Domark® Fungicide controls disease without causing green stems and delaying harvest
Green stems can cause many hassles for farmers, including clogging equipment and even having to slow down or stop harvest altogether. Though a variety of conditions may contribute to green stems, many farmers have seen improved results over green stems as well as an overall increased yield by using Domark® Fungicide as part of their annual program.

“Strobilurin fungicides tend to keep the plant greener longer, sometimes well into the end of the season. This can be problematic if the soybean pod is ready to be harvested but the rest of the plant is not,” said Gerald Holmes, Valent product development manager. “In various trials, we have seen that as a triazole chemistry Domark does not have the same issues with green stem effect that is seen among strobilurin fungicides.”

To help fight green stems, many farmers choose to make an additional desiccation pass at the end of the season—an additional step which adds time and money to harvesting operations.

According to Dr. Jason Bond, plant pathologist at Southern Illinois University, "In this type of season, it’s not going to be pleasant if farmers have to deal with harvesting delays or frustrations on top of everything else.”

“The late-season planting is a different phenomenon than even what was experienced last year in Illinois. This season has also produced more frequent rainy and cloudy days, so the conditions for foliar diseases are more conducive than in 2008. Definitely selecting the best fungicides for disease control on the front end will pay off,” Bond said. 

Domark is part of the strong lineup of soybean products from Valent U.S.A. Corporation: Cobra® Herbicide, Gangster® Herbicide, Phoenix™ Herbicide, Resource® Herbicide, Select Max® Herbicide with Inside Technology™, Valor® Herbicide and Valor XLT Soybean Herbicide.

Valent U.S.A. Corporation markets and sells herbicides, fungicides, insecticides, bioinsecticides, insect growth regulators, nematicides, baits and plant growth regulators for the agricultural, horticultural, turf and ornamental markets.

For more information about Domark Fungicide, Valent U.S.A. Corporation or Valent's full product line, call 800-6-VALENT (682-5368).