Plant guide:ð Pumpkin
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Fungal
Bacterial Wilt on Pumpkin Vines
Commonly affects: Cucurbita pepo, C. maxima, C. moschata (Pumpkin)
Individual leaves wilt during the day and may partially recover at night at first, but the whole vine collapses within days as the disease progresses. Cutting a wilted stem and pressing the cut ends together produces a sticky, stringy bacterial ooze when slowly pulled apart.
Potential Causes
- 1Erwinia tracheiphila bacteria, transmitted almost exclusively by cucumber beetle feeding
- 2Striped or spotted cucumber beetles carrying the bacteria between plants as they feed
- 3Wounds from beetle feeding giving the bacteria direct entry to the vascular system
Solution Steps
- 1Remove and destroy affected vines immediately â there is no cure once bacterial wilt is established.
- 2Control cucumber beetles aggressively with row covers on young plants (removed once flowering begins for pollination) and targeted insecticide if populations are high.
- 3Avoid working around plants after handling beetles, since bacteria can transfer on hands and tools.
- 4Monitor remaining healthy vines closely, since beetles will continue spreading the disease.
Prevention Tip
Since bacterial wilt has no cure and no resistant pumpkin varieties exist, controlling cucumber beetles from the seedling stage onward is the only real prevention.
