Reading up on Mildews, the book says that they are definitely species specific. So the one attacking your cucurbits will not attack any other plants. That is not to say that the conditions which allowed it to grow, will not allow another form to attack something else on the site.
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Reading up on Mildews, the book says that they are definitely species specific. So the one attacking your cucurbits will not attack any other plants. That is not to say that the conditions which allowed it to grow, will not allow another form to attack something else on the site.