Wilt disease

Source: Wikipedia, the free encyclopedia.

A wilt disease is any number of

fungi, bacteria, and nematodes can cause rapid killing of plants, large tree
branches or even entire trees.

A pine tree with pine wilt

Wilt diseases in woody plants tend to fall into two major categories, those that start with the branches and those that start with the roots. Those that start with the branches most often start with pathogens that feed on the leaves or bark, those that start with the roots start with wounding or direct entry by the pathogen into the roots, some are spread from one plant to another by way of root grafts.[1]

Pathogens that cause wilting diseases invade the vascular vessels and cause the xylem to fail to transport water to the foliage, thus causing wilting of stems and leaves.[2]

Wilt diseases

Wilt diseases include:

Bacterial wilt of cucurbits

Bacterial wilt of

fecal matter of the beetles enters the plant through wounds in the epidermis. The bacteria need a film of water to facilitate infection. The bacteria can also be transmitted from one plant to another when beetles feed on an infected plant and the bacteria becomes attached to the beetles mouthparts.[4]

The bacteria

Olea europea), and others.[citation needed
]

Dutch elm disease

Dutch elm disease is caused by the fungus Ophiostoma ulmi, it affects elm trees.[citation needed]

Elm yellows

Elm yellows sometimes called elm phloem necrosis, affects elm trees and is caused by a Mycoplasma like organism. It is spread by the white-banded leafhopper.[citation needed]

Mimosa wilt

Mimosa wilt is caused by the fungus Fusarium oxysporum. It enters through the roots and spreads into the vascular system through the tree's sap. As it grows it clogs the vascular tissue leading to yellowing leaves and defoliation.[6]

Oak wilt

Oak wilt is a fungal caused by

Red oaks are very susceptible.[7]

Persimmon wilt

Persimmon wilt attacks persimmons and is caused by Acromonium diospyri, a fungus. In the United States it has nearly eliminated persimmons from the central basin of Tennessee. Because of its lethality to persimmons, it was proposed as a biological control agent to eliminate unwanted native persimmons.[8]

Pine wilt

Main article: Bursaphelenchus xylophilus

Pine wilt is caused by the North American native pinewood nematode (

indigenous it is not major pathogen of native pine species, but in North America it causes wilt in a few non-native North American pine species. It has been introduced into Japan and China,[10] where it has become a troubling disease of Japanese red pines (Pinus densiflora) and black pines (Pinus thunbergii). Over 46 million cubic meters of trees have been lost alone in Japan over a 50-year period.[10] It is spread among conifers by pine sawyer beetles (Monochamus spp). The nematodes can reproduce quickly in the sapwood under favorable conditions within susceptible pine species, causing wilting and death, sometimes in only a few weeks. North America lumber products are under export restrictions because of the nematode.[11] In the Midwest United States it has killed many Scots pines (Pinus sylvestris), and this attractive tree is no longer recommended for landscaping uses there.[12]

Stewart's wilt

Stewart's wilt is caused by the bacteria Pantoea stewartii and affects corn plants especially sweet corn. It is a problem in the production of sweet corn in the Northeastern US.[13][14]

Verticillium wilt

eudicot plants caused by one of two species of Verticillium fungus, V. dahliae and V. albo-atrum. Many economically important plants are susceptible including cotton, tomatoes, potatoes, eggplants, peppers and ornamentals, as well as others in natural vegetation communities.[citation needed
]

Chilli wilt

Chilli wilt is caused by fungus Fusarium oxysporum f. sp. capsici. The affected plant dies suddenly as a result of toxins produced by the fungus or by the choking of vascular tissues by the fungal structures.[citation needed]

See also

  • Forest pathology

References

  1. ISBN 0-12-684350-3
    .
  2. ^ Terry Price. "Wilt Diseases". Georgia Forestry Commission. Archived from the original on 2008-11-19.
  3. ^ admin (10 December 2014). "UMass Extension Vegetable Program".
  4. ^ "Bacterial wilt: Erwinia tracheiphila". Archived from the original on 2002-01-26.
  5. ISBN 978-3-540-63887-2
    .
  6. ^ Bush, Elizabeth A. “Fusarium Wilt of Mimosa (Albizia Julibrissin).” VCE Publications | Virginia Tech, 2014, pubs.ext.vt.edu/2811/2811-1020/2811-1020.html.
  7. ^ "Northern Red Oak: Quercus rubra L." (PDF). USDA.
  8. ^ J. J. McRitchie (February 1979). "Cephalosporium Wilt Of Persimmon" (PDF). Division of Plant Industry. Archived from the original (PDF) on 2010-12-03.
  9. ^ "Pine Wilt Disease" (PDF). University of Illinois. May 1998. Archived from the original (PDF) on 2004-11-30.
  10. ^
    ISBN 978-4-431-75654-5
    .
  11. ^ "Northeastern Area State & Private Forestry". USDA Forest Service.
  12. ^ "Pine Wilt" (PDF). extension.missouri.edu.
  13. ^ admin (10 December 2014). "UMass Extension Vegetable Program".
  14. ^ "Stewart's Bacterial Wilt and Leaf Blight of Corn, AC-0037-01". Archived from the original on 2001-12-24. Retrieved 2009-11-16.
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