Neem Insecticide For Squash Bugs
Squash bugs (Anasa tristis) are sap-sucking pests that target vine-growing vegetables like melon, pumpkin and, of course, squash. Foliage on infested plants wilts and becomes brittle; without effective management, plants will die. Does this Spark an idea?
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Description
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The neem tree (Azadirachta indica) originated in southern Asia and has been used as a pesticide for centuries according to the Resource Guide for Organic Insect and Disease Management. The tree seeds are crushed and the active ingredient azadirachtin is extracted. Azadirachtin controls insects in three ways: 1) insect growth regulator by preventing molting; 2) antifeedant; and 3) egg-laying deterrent.
Application
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Adult squash bugs are difficult to control using neem. Rather, neem is most effective at killing immature nymphs. Good coverage is essential, particularly under leaves and deep within plants. In addition, repeat applications are necessary because neem breaks down quickly with exposure to sunlight and is washed away by rain.
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Prevention
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Prevention of squash bugs begins the prior growing season; after harvest, remove and destroy vines to deter pests from overwintering in the garden. Also apply neem to young seedlings immediately before transplanting as a preventative measure.
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References
- National Sustainable Agriculture Information Service: Squash Bug and Squash Vine Borer: Organic Controls
- UC IPM Online: Squash Bugs
- Resource Guide for Organic Insect and Disease Management: Material Fact Sheet--Neem
- Clemson Cooperative Extension: Cucumber, Squash, Melon & Other Cucurbit Insect Pests
- Photo Credit Brand X Pictures/Brand X Pictures/Getty Images
