Cnephasia longana
Pest description and crop damage Yellowish brown larvae with a brown head and light stripes on each side of the back. They web terminal leaves and feed on terminal growth.
Management-chemical control
- Bacillus thuringiensis (Bt) 2025-PHI 0 days. REI 12 hr. Use as label directs. Some formulations are OMRI-listed for organic use.
- Malathion 2025 at 1 to 1.25 lb ai/A. PHI 7 days. REI 12 hr. Avoid applying spray on bloom. Malathion is toxic to all bees. To control pests when bloom is present, apply only in evening or early morning, when bees are not actively foraging in vetch. Always contact beekeeper before applying.