Bacterial leaf scorch

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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]

Bacterial leaf scorch
2013-05-04 14 07 38 Large Pin Oak (Quercus palustris) stricken with bacterial leaf scorch during leaf-out near the house at 988 Terrace Boulevard in Ewing, New Jersey.JPG
Large pin oak (Quercus palustris) stricken with bacterial leaf scorch during leaf-out near the house at 988 Terrace Boulevard in Ewing, New Jersey
Common namesBLS
Causal agentsXylella fastidiosa
Hoststrees and crops
Vectorsleafhoppers

HostsEdit

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 tomatoesEdit

Bacterial spot of peppers and tomatoes is caused by the bacteria Xanthomonas campestris pv. vesicatoria.

Bacterial spot of peachesEdit

Bacterial spot of peaches is caused by the bacteria Xanthomonas campestris pv. pruni. Spots may form on the leaves and they can be mistaken for peach scab, which is caused by a fungus.

Bacterial spot of pecansEdit

SymptomsEdit

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]

VectorsEdit

Xylem-feeding leafhoppers can transmit the disease bacteria.[2]

TreatmentEdit

There are no known effective treatments for BLS, consequently, removal of affected plants is recommended.[2]

See alsoEdit

ReferencesEdit

  1. ^ a b "Forest Health Protection - Northeastern Area State and Private Forestry". www.fs.usda.gov.
  2. ^ a b c d http://www.usna.usda.gov/Research/BacterialLeafScorch.html

External linksEdit