Fuente: WIPO "tomato" The present invention provides a combination comprising an amount of a keto-enol insecticide and an amount of a compound having the formula (I): R1-O—(CmH2mO)x-(CnH2nO)y-H wherein R1 is linear or branched, saturated or unsaturated acyl radical having from 14 to 20 carbon atoms; m is an integer equal to 2, n is an integer equal to 3, x is an integer of from 1 to 50 and y is an integer of from 0 to 50.