CDM Resources

Interpreting Threats and Risks

This page contains information on source threats and their associated risks, as well as how the risk assessments are formulated


Photo Gallery of Foliar Diseases (including Downy Mildew)

View this page to see various foliar diseases on cucurbits


Field Identification

See tips for how to identify select cucurbit diseases with a hand lens as well as illustrations showing how diseases effect cucurbits


Basil Downy Mildew Mapping

This will take you to the Basil Downy Mildew site


Interesting Links

A collection of useful, interesting links relating to Cucurbit Downy Mildew


Maps of Cucurbit Acreage

See past maps taken from the USDA Agricultural Census on cucurbit harvests

Cucurbit Crops Grouped by Scientific Name

Downy mildew pathogen specialization is based on cucurbit Latin name. This is important to understand when determining if a specific crop type being grown is at risk for downy mildew.  For example, if you are growing Halloween pumpkin, then downy mildew reported occurring nearby (within the same risk area for a forecast) on any Cucurbita pepo is a potential source of the pathogen for your crop.  The map filter displays downy mildew occurrence based on Latin name.
Latin (scientific) name Common name
Cucumis sativus Cucumber
Cucumis melo Cantaloupe, honeydew melon
Cucurbita moschata Butternut squash, calabaza squash, cheese pumpkin, neck pumpkin
Cucurbita pepo Summer squash, zucchini, pattypan squash, acorn squash, delicata squash, spaghetti squash, Halloween pumpkin, some gourds
Cucurbita maxima Buttercup squash, Hubbard squash, kabocha squash, red kuri squash, giant pumpkin, processing pumpkin, Turk's turban gourd, banana squash, + some less commonly grown squashes
Citrullus lanatus Watermelon
Some other cucurbits:
Cucurbita argyrosperma* Cushaw squash *aka C. mixta
Lagenaria siceraria Bottle gourd, calabash, swan gourd
Luffa cylindrica Sponge gourd
Trichosanthes cucumerina Snake gourd