What about the withered branches and leaves of roses? Urgent!

cardinal symptom

It usually occurs on the branches, and ulcer spots appear on the branches. At first, the spot was little red dot, which gradually expanded to dark color, and the center of the spot became light brown. The brown and purple edges around the spots are obviously in contrast to the green of the stems. When the center of the spot turns brown, conidia of the disease appear. With the increase of meristematic vesicles, the stem epidermis appears longitudinal crack, and the spots are sunken and cracked in the later stage. Black spots can appear in the affected area, and black spots appear when it is wet. When the condition is serious, some branches and leaves above the diseased part atrophy and die.

Pruning dead branches should be done on sunny days. First, the incision was disinfected with 10% copper sulfate, and then an antiseptic film was coated on the wound to protect the growth of wound healing tissue, prevent the infection of rotten bacteria and promote the early healing of the wound.

3. 70% chlorothalonil wettable powder or 1000 times 50% carbendazim wettable powder can be sprayed for control.