咖啡锈病是咖啡的主要病害,危害性最大。受害的小粒种咖啡植株轻者减产,重者死亡。咖啡锈病主要为害叶片,有时也侵害幼果和嫩枝。叶片感病后,最初出现许多浅黄色小斑,并呈水渍状扩大,叶背面随即出现橙黄色粉状孢子堆,病斑周围有浅绿晕圈,后期病斑逐渐扩大或连在一起,成为不规则 Coffee rust is the main coffee disease, the most harmful. The victims of small grains of coffee plant light weight production, severe cases of death. Coffee rust mainly leaves damage, sometimes against young fruit and twigs. Leaf flu after the initial emergence of many light yellow small spots, and was water-like expansion, leaf orange powdery spore pile immediately after the emergence of a spot around the lesion with a light green halo, the lesion gradually expanded or even together, Become irregular