Why Spinosad Is Restricted on Collards in Georgia

Resistance Management History

Diamondback moth caterpillars developed resistance to spinosad after years of heavy use. To preserve efficacy, Georgia limited applications on leafy greens (collards, kale, mustard, spinach). Homeowner labels now carry the restriction.

Alternative

Use Bacillus thuringiensis (B.t.) – an organic caterpillar‑specific insecticide with no resistance issues.