The Long Island Horticultural Research and Extension center’s Vegetable Pathology group added a new photo gallery of Cercospora leaf spot of Cucumber.
“This disease can occur anywhere throughout the eastern US, even in a garden with just one cucumber plant and no past occurrences. This is because the pathogen spreads via wind-dispersed spores that can be moved long distances and be deposited by chance anywhere.”
The Cornell vegetable program published information on “How to Take a Photo for Crop Diagnostics” and the “2020 Cornell Integrated Crop and Pest Management Guidelines for Commercial Vegetable Production” are now available.
Fruit rot caused by Pythium species can be confused for that caused by Phytophthora capsici, another oomycete pathogen, because they both produce white growth on affected fruit.
Our guest is Meg McGrath, the Mildew Maven of Cornell. She will be joining us this week to talk all about powdery mildew in vine crops! Meg has spent a career learning how pathogens survive between crops, investigating factors that favor disease development, evaluating fungicides and resistant varieties, developing scouting protocols and action thresholds for timing the initiation of fungicide applications after disease detection.
“Cucurbit downy mildew is a devastating disease in central and eastern United States as well as globally. Cucurbit downy mildew can cause severe losses. It is caused by Pseudoperonospora cubensis, which is an oomycete pathogen, otherwise known as a water mold.”
Cornell University’s Long Island Horticultural Research and Extension Center added a new photo gallery of Gummy stem blight and black rot of cucurbits.
Cornell University’s Long Island Horticultural Research and Extension Center added a new photo gallery of Angular leaf spot on cucurbits. “Warm humid conditions with frequent rain are favorable for development of angular leaf spot. Typical of bacterial pathogens, this one is dispersed primarily by splashing water.”