BACILLUS THURENGIENSIS (BT) is one of the oldest and well known biological control agents. It is active against caterpillars on brassicas - a common pest which can destroy a crop in a short time. Also suitable for caterpillars in plums and cherry crops. BT sprayed on the plant will be taken up by the caterpillar. The bacillus blocks the digestive system of the pest. Available for immediate delivery.