Halting Tomato Hornworms with Bacillus thuringiensis
By: Maureen Gilmer
Tomato hornworms arrive at night as gossamer-winged moths that lay their eggs on your carefully cultivated tomatoes. Hatchlings quickly grow to enormous green caterpillars that can decimate a plant overnight.
Inspect new growth daily for these voracious caterpillars. Hand pick them promptly and discard before they feed on the fruit itself.
Another option is to spray the plants with BT (Bacillus thuringiensis). This safe, non toxic, control is approved for organic gardening. Once BT is on the leaves, worms eat it and get a fatal belly ache. This natural spray is one of the greatest success stories in organic horticulture. You’ll find it in garden centers and home improvement stores wherever Black Gold products are sold.
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