The Massachusetts Department of Agriculture reports that gypsy moth caterpillars are emerging from the egg masses laid in trees last fall. Check trees on your property daily for signs of them. If you see tiny caterpillars, it’s time to act. BT-K (Bacillus thuringiensis K) is an environmentally friendly spray available at local nurseries. When the caterpillars ingest the BT-K, it will kill them. But even with this, please use it carefully and read the application information. Our thus-far wet spring offers hope that, in future years, a naturally-occurring fungus will keep the population of gypsy moths in check.
Emerging gypsy moth caterpillars are susceptible to a spraying of BT-K
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