It is generally believed that apple rough skin disease and stem bromreosis are the same disease, in fact, they are different.
1. The initial onset of rough skin disease generally starts from the tip of the new shoot, and gradually develops downwards until the trunk. The initial onset of ringworm disease generally starts from the main base and gradually develops upwards.
2. Rough skin blisters are protruding from the phloem, mostly around the lenticels, slightly higher than the epidermis, irregular shape, smooth surface, difficult to cut off with nails, cut with a blade to see the small brown spots; Herpes zosteris is caused by lenticels invading the lenticels. It occurs at the lenticels and is significantly higher than the epidermis. It is like a small ball born on the epidermis with a dark brown gel. It's easy to peel off with your nails, under which is the green phloem.
3. The dermatological lesions began to sag from the middle, mainly in the longitudinal cracks, and the rim of the ring vein disease began from the edge of the lesion, forming a clear boundary with the healthy tissue, showing a saddle-like tilt, with sparsely black small particles on it.
4. The rough skin disease is vertical and horizontal cracks, cracks deep and wide, seriously hinder the transport of organic matter, so easily lead to the death of branches, while the ring vein disease is shallow, limited to the epidermis, can cause weakening tree vigor, but generally not dead Dead tree.
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