fruitHexanal formulation and EFF were applied as preharvest sprays,once a week, and twice a week on tomato fruit on the vine, for 3consecutive weeks. Table 1 shows colour properties of tomatoesharvested after 2 and 3 weeks of spraying. Brightness was less intomatoes harvested after 2 and 3 weeks of spraying with EFF andin hexanal treated tomatoes harvested after 2 weeks of sprayingthan in the controls (Table 1). The differences in brightness werenot significant after 3 weeks of spraying. Fruit harvested 2 weeksafter spraying with either hexanal, or EFF, showed increased a+val-ues suggesting improved red colour than in control fruit (18.03) inall treatments except in the case of tomatoes treated with 0.01%hexanal (once a week, 16.71). An overall reduction in red colourintensity was observed in fruit harvested after 3 weeks of spraying,compared to those subjected to 2 weeks of treatment with hex-anal. In contrast to a reduction in red colour intensity, there were nosignificant differences in yellow colour intensity in response to hex-anal and EFF treatments. Hue angle (Ho) decreased with increase ofred colour intensity (a+) and unsprayed controls recorded higher