Tag shield is a fungicide containing chlorothalonil 75 % WP . It is a broad spectrum contact fungicide and is highly effective against Anthracnose. Fruit rots, tikka disease, early and late blight on various crops. It gives outstanding results when used prophylactically. Chlorothalonil is a multi-site inhibitor affecting various enzymes and other metabolic processes in fungi. It inhibits spore germination, and is toxic to fungal cell membranes.