Heirloom vs Hybrid Pest Resistance: Soil Health & Row Covers Win

WA gardener: first big garden, severe bugs (cabbage aphids, slugs, corn pests). Told heirlooms resist bugs better. Asks opinion and prevention.

Heirlooms Are Not More Pest‑Resistant

Pest pressure depends on plant health, not variety type. Stressed plants attract pests.

Three‑Tier Prevention

1. Organic Soil Health: Amend early with compost, manure, peat. Attracts beneficials, feeds plants steadily, improves drainage.
2. Row Covers (Reemay): Cover young plants. Floats above, lets water/air in, keeps pests out. **Remove at flowering** for pollination.
3. Organic Sprays (Post‑Cover):
   • Bt (Dipel/MVP) for caterpillars/worms on brassicas.
   • Pyrethrum / Rotenone for flying insects.
   • Apply 7‑10 days. Non‑toxic, harvest‑safe.

Sources

Gardens Alive, Planet Natural.

Healthy soil + physical barriers + targeted organic sprays = pest management without heirloom myth.