Leaf tips turn white and twist corkscrew-like or bend at right angles.They may become chlorotic and die back.
Copper Deficiency Adequate supplies of copper are important for bulb skin and onion scale development.
Onion: 0.5 l/ha two weeks after transplanting, or in the case of direct sown crops, when the crop is 15 cm tall. Repeat applications at 10 to 14 day intervals. Water rate: 50-200 l/ha.Read more about YaraVita COPTRAC 500