Phytophthora nicotianae producing late blight-like symptoms in NC

Outbreaks of Phytophthora nicotianae have been reported on tomato and potato in North Carolina. These infections of P. nicotianae are producing foliar lesions similar to symptoms of late blight infection. Growers are encouraged to monitor their crops carefully and to submit samples for further analysis if late blight or P. nicotianae is suspected. As of June 12, no late blight has been detected in the state. More information on differences between the two causal species, recommended treatment options, and photos of symptoms can be found in articles on the NCSU Plant Pathology Extension website:

Phytophthora diseases occurring on fruiting vegetables in WNC
Phytophthora nicotianae causing severe disease on potato and tomato in North Carolina


Phytophthora workshop held in India

A workshop on "Rapid Diagnostic Tools for Identification of Phytophthora species on Horticultural Crops " organized by Dr. Jean Ristaino, with the assistance of Dr. Pallem Chowdappa and Dr. David Cooke was held at the ICAR- Central Plantation Crops Research Institute, Bangalore India, Sept 8, 2015 preceding the 3rd International Phytophthora Symposium, Sept 9-12.  Over 120 participants applied for the workshop that included 30 students from diverse research institutes in India. The hands on laboratory training in morphological and molecular identification of Phytophthora species included use of a diagnostic Lucid key, PCR and molecular sequence based identification and rapid assays for identification of Phytophthora infestans.  

A workbook was distributed to workshop participants and is available here

See more on the Global Phytophthora Diagnostic Network on Facebook




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