Active ingredient is Bacillus thuringiensis (Bt). On close inspection of the box leaves, you may find densely woven webbing, and the caterpillar will probably be protecting itself within the webbing.
Xentari - Box Caterpillar Killer - Organic - Box Plant Treatment - Xentari
Xentari - Box Caterpillar Killer / Control - Organic - Xentari - 2 x 1gram pack
Xentari - Organic Box Caterpillar Killer - Box Plant Control - 5 grams - Xentari
Xentari Organic Box Caterpillar Killer - Box Caterpillar Control - 10g
Xentari - Organic Box Caterpillar Killer Control - Xentari - 25 grams (5 x 5gms)
Xentari Organic Box Caterpillar Killer / Control - 2 grams - Xentari
