Over sixty years ago Wilt-Pruf® was developed and became the first anti-transpirant on the market. Anti-transpirants are chemical compounds applied to plant leaves to reduce transpiration of moisture. Anti-transpirants are used to protect plants from drying out when under water stress. Wilt-Pruf® is a natural pine oil emulsion that is organic, non-hazardous and biodegradable. Wilt-Pruf® spray dries to form a clear transparent and flexible protective coating without interfering with plant growth or materially affecting respiration, osmosis or photosynthesis.