a method for systemically mitigating environmental stress from heat or radiation on a fruit plant and the pre - harvested fruit thereof that comprises the steps of : preparing an agricultural composition wherein the composition comprises an ethylene oxide - propylene oxide block copolymer , a c 1 - c 4 alkyl ether of ethylene oxide - propylene oxide block copolymer , and an alkyl polyglycoside ; and intimately contacting root zone soil of soil containing a fruit plant with a bioefficaciously effective amount of the agricultural composition to systemically mitigate environmental stress on the plant and the pre - harvested fruit thereof from heat or radiation impacting the surface of the plant or fruit above the surface of the soil , whereby the agricultural composition is not substantially absorbed into the plant .