Abstract: An experiment was conducted to study the effect of 1000 and 1500 ppm KNap and 2 ppm mixtalol on chlorophyll a, b and carotenoid content of rapeseed leaf. Results showed that chlorophyll a, b and carotenoid content of leaves were positively affected by 1000 ppm KNap and 2 ppm mixtalol but 1500 ppm KNap was failed to show any significant positive effect on chlorophyll content of rapeseed leaf. Two years mean results showed increased chlorophyll a, b and carotenoid content of leaves of rapeseed plant over control following 2 ppm mixtalol and 1000 ppm KNap single and double spray treatments.