Controlling Webworms in Fruitless Mulberry

Central Texas fruitless mulberry had three webworm cycles last year; infestation started early this year (April 25). Owner asks about prevention beyond manual web removal.

Treatment Options

• Bt (Bacillus thuringiensis): Kills young caterpillars as they eat leaves. Safe for beneficials, pets, wildlife.
• Contact insecticides (Sevin, etc.): Spray on caterpillars.
• Systemic (Bayer Advanced Tree & Shrub Insect Control): Soil-applied, moves to foliage, protects 12 months. Best for prevention.

Bt Details

Naturally occurring soil bacterium. Proteins paralyze caterpillar digestion; they stop feeding in hours, die in days. Specific to leaf-feeding caterpillars. Non-toxic to bees, predators, vertebrates.

Safety

Bt and homeowner sprays don't harm birds. Restricted-use professional products can—but not sold to homeowners.

Recommendation

Apply systemic Bayer Advanced now for season-long prevention. Spot-treat any breakthrough with Bt.