1880 14 Oct. 346/1 This attempt to show that it is the action of the mycelium which causes the leaf-discoloration is quite worthless.
1969 S.-H. Ou & C. T. Rivera in iii. 25 The leaf discoloration varies from shades of yellow in certain varieties to shades of orange in others.
2001 (Nexis) 14 Apr. This high-nitrogen formula boosts bushiness and growth, and helps prevent fruit drop, premature ripening and leaf discoloration.