Topbuxus Anti Caterpillar - 15G (5 x 3 grams)TOPBUXUS Anti Caterpillar is a biological product containing a natural, potent strain of the microorganism Bacillus thuringiensis subspecies aizawai (Bta) that controls caterpillars. Simply dissolve the micro granules in water. Ideally 3 gram for 3 litre of water for 30m of boxwood surface. Thoroughly spray the upper and under sides of the leaves for effective usage. When a caterpillar eats the treated leaves, it ingests the Cry proteins from TOPBUXUS