Bagworm Infestation on Leyland Cypress: Act Now

Bagworms can skeletonize Leyland cypress by August. Once the brown “bags” are large and noticeable, insecticides won’t penetrate. The only remedy is hand removal: wear long sleeves, pluck every bag, and destroy them (eggs hide in the tip). Mark your calendar to spray Bacillus thuringiensis or a landscape insecticide three times at weekly intervals starting mid-May next year, before bags form.