Pest Special: Effective against all kinds of crop pest & insect Yantra blocks the spiracles of the insects killing them by suffocation & Vaayu kills the insect larvae by fumigant action,the body of larvae is burnt and at once exposed to environment deterioration gives black coloration Vaayu binds the physiological receptors thereby causing hypertension which results in immobilization of parts & Yantra work as an anti-feedant and fumigative and it stops their ability to identify food. YANTRA & VAAYU are organic products derived from herbal extract.