Triệu chứng In the beginning orange-brown powdery masses can be found on the leaf underside. Small yellowish to brown lesions are later seen on both leaf sides. As the diseases develops the orange masses become dark-brown to almost black and form elongated lesions. Heavy infestation will cause the whole tree
Grape Rust
Nấm
Triệu chứng
In the beginning orange-brown powdery masses can be found on the leaf underside. Small yellowish to brown lesions are later seen on both leaf sides. As the diseases develops the orange masses become dark-brown to almost black and form elongated lesions. Heavy infestation will cause the whole tree to appear yellow or brown and eventually causes premature defoliation. In the following growing season shoots will have poor growth causing stunted growth of vines. The disease can cause poor shoot growth, reduction of fruit quality and yield loss.
