Bacterial leaf scorch
| Bacterial leaf scorch | |
|---|---|
 Large pin oak (Quercus palustris) stricken with bacterial leaf scorch during leaf-out | |
| Common names | BLS |
| Causal agents | Xylella fastidiosa |
| Hosts | trees and crops |
| Vectors | leafhoppers |
Bacterial leaf scorch (commonly abbreviated BLS, also called bacterial leaf spot) is a disease state affecting many crops, caused mainly by the xylem-plugging bacterium Xylella fastidiosa.[1] It can be mistaken for ordinary leaf scorch caused by cultural practices such as over-fertilization.[1]
Hosts[]
BLS can be found on a wide variety of hosts, ranging from ornamental trees (elm, maple, oak) and shrubs, to crop species including blueberry and almond.
Bacterial spot of peppers and tomatoes[]
Bacterial spot of peppers and tomatoes is caused by the bacteria Xanthomonas campestris pv. vesicatoria.
Bacterial spot of peaches[]
Bacterial spot of peaches is caused by the bacteria . Spots may form on the leaves and they can be mistaken for peach scab, which is caused by a fungus.
Bacterial spot of pecans[]
Symptoms[]
An irregular browning leaf margin which may or may not be bordered by a pale halo.[2]
Symptoms re-occur every year, spreading throughout the tree crown, eventually killing the host plant.[2]
Vectors[]
Xylem-feeding leafhoppers can transmit the disease bacteria.[2]
Treatment[]
There are no known effective treatments for BLS, consequently, removal of affected plants is recommended.[2]
See also[]
References[]
External links[]
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- Bacterial tree pathogens and diseases
- Food plant pathogens and diseases
- Leaf diseases
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