New active ingredient for seed treatments
Seed treatments have been used as a way to protect seeds from soil-borne fungi and to protect the farmer’s seed investment. But combating seedling diseases can be complicated when dealing with the either multiple fungi or multiple species of fungi in a field.
Seedling diseases like Phytophthora on soybeans challenge growers to better protect their seed investment with seed treatments. “When we deal with plant diseases, quite often we are dealing with a single organism that’s causing a disease,” said Jason Bond, plant pathologist, Southern Illinois University. “But in the area of seedling diseases, there are multiple pathogens and multiple species of a particular genus, so you would have a huge complex in any given field that could be potentially involved in a seedling disease complex.”
However, not all pathogens are fungi, Bond explained. “We have some organisms that are oomycetes, and then we have some organisms that are true fungi, like Fusarium and Rhizoctonia.
Then in each one of those we have multiple species. So, that’s a challenge with regard to us doing control measures, to manage them and also to find out what in the world is going on in the fi eld when we’re dealing with problem situations.”
Controlling both fungi and oomycetes can be challenging for seed treatments, but a new active ingredient may help offer new protection for seeds as of spring 2014.
Ethaboxam, which at press time was awaiting federal registration from the Environmental Protection Agency for use as a seed treatment on corn, soybeans, cereals (excluding rice and wild rice), sorghum, canola and wheat, is expected to be approved by the end of 2013.
Valent USA plans to introduce ethaboxam to the industry in combination with metalaxyl as a seed treatment in a limited capacity for 2014. The combination of the two actives, yet to be given a name at press time, will provide two different mode of actions to fight off disease development and fungicide resistance. The name for this combination will be announced soon.
Ethaboxam is a novel thiazole carboxamide fungicide and is the first Phytophthora and Pythium seed treatment fungicide to be introduced in more than 30 years, according to Dair McDuffee, seed treatment specialist, Valent USA. Ethaboxam is expected to significantly improve disease control against the most prevalent fungal species.
“We haven’t had any new active ingredients that are targeting oomycetes in the seed treatment industry for a good number of years,” said McDuffee.
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