How to control Cercospora leaf spot on Japanese honeysuckle
Cercospora leaf spot of Japanese honeysuckle (Cercospora rhamni). (1) Damage: it affects the leaves, and in summer, from July to August, the disease is severe; after onset, the spots on the leaves are round or, restricted by the leaf veins, polygonal, yellow-brown, and in humid conditions gray mold-like growth appears on the underside. (2) Control method: remove diseased branches and leaves to reduce the source of the pathogen; spray Bordeaux mixture at 1:1.5:200 in the early stage of the disease, once every 7-10 days, for 2-3 times in a row.
Cercospora leaf spot of Japanese honeysuckle (Cercospora rhamni).
(1) Damage: it affects the leaves, and in summer, from July to August, the disease is severe; after onset, the spots on the leaves are round or, restricted by the leaf veins, polygonal, yellow-brown, and in humid conditions gray mold-like growth appears on the underside.
(2) Control method: remove diseased branches and leaves to reduce the source of the pathogen; spray Bordeaux mixture at 1:1.5:200 in the early stage of the disease, once every 7-10 days, for 2-3 times in a row.