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US scientists target pecan scab with nematode extracts

US researchers have found that compounds extracted from nematode-dwelling bacteria are effective against the fungus, Fusicladium effusum, which causes pecan scab. Scientists at the USDA's Agricultural Research Service examined chemical extracts from bacteria in Steinernema spp and Heterorhabditis spp nematodes. The extract most toxic to F effusum was found to contain trans-cinnamic acid. Laboratory tests showed that trans-cinnamic acid was toxic to the fungus at 148-200 µg/ml in solid culture and 64 µg/ml in liquid culture. The research was published in the Journal of Pest Science.

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