Saving Zucchini Plants from Squash Vine Borers: Identification and Control Strategies

Recognizing Squash Vine Borer Damage

Sudden wilting that temporarily recovers with water, then wilts again, is classic borer damage. Look for entry holes, sawdust-like frass, or larvae inside stems.

Inspecting Stems for Larvae

Slit open a wilted stem lengthwise. If you find a fat white caterpillar, that's the borer. Remove and destroy it.

Organic and Cultural Control Methods

• Dig out larvae and bury the damaged stem section; it may re-root.
• Dust stems with rotenone or rotenone-pyrethrin powder (wear gloves).
• Use floating row covers, removing for a few hours each morning for bee pollination, or hand-pollinate.
• Wrap stems with aluminum foil or apply shaving cream to confuse egg-laying moths.

Preventive Measures for Future Seasons

Rotate crops, clean up debris, and consider resistant varieties. Early monitoring is crucial.