Tuesday, 24 April 2018
Login |  Register 
 
Find Products or Services in your local community
 
MSC News National Headlines U.S Health Tech Talk World Business Sports Top Headlines
Pine Wilt – Breaking the Disease Cycle
03/16/2018
 

One of the more devastating tree issues I’ve seen over the years has to be pine wilt. As it’s name implies, the disease attacks pine trees – Scots pine in particular – ultimately resulting in death of the tree. For landowners that have planted pine trees over the years, it’s been tough to see many of those windbreaks that so much time was spent planting, die in such a short time.

Often thought of as a disease, pine wilt is actually caused by the pinewood nematode, a microscopic worm. The nematode isn’t very mobile, but is readily spread by an insect called the pine sawyer beetle. The beetle transports the nematode, which then feeds on pine trees, multiplying in the tree’s resin canals, resulting in wilting and death in anywhere from several weeks to several months. After both the nematode and beetle overwinter in infected trees, they will start to emerge in early May, carrying nematodes to new trees and continuing the cycle of infection. Eastern Kansas has been a hotbed of activity for almost two decades now.

Infections are most visible from August to December. At first, you’ll notice needles that turn grey or green, then yellow and brown. Sometimes, the discoloration occurs branch by branch. Other times, the tree will turn brown all at once. Resin production is greatly reduced so wounds on infected trees won’t tend to ooze much if injured with branches becoming dry or brittle. The entire tree eventually succumbs to the disease within a few months to a year.

Pine wilt can be confused with other diseases. Pine tip blight is one, but it will tend to be confined to branch ends and generally results in death of only part of the tree. Pine wilt infected trees will result in death of the entire tree. If you want to compare pine wilt symptomology to other diseases, check out Pine Disease in Kansas by K-State Research & Extension Plant Pathologist Dr. Megan Kennelly. It has descriptions of our common pine diseases along with color images to help with identification. It is available upon request from any District Office or found online at: http://www.ksre.ksu.edu/bookstore/pubs/l722.pdf .

Infected trees should be cut down and removed by April first to allow time to destroy infected wood by May first when the beetles start to emerge. Cut the tree to the ground level (no stumps). Chip or burn the wood immediately to destroy the beetles and nematodes. Do not keep pine wood around for firewood.

Need help identifying the disease you may dealing with? Contact a District Office for assistance or e-mail me at [email protected] .

You will need to be logged in to leave a comment.
Please Login

characters left

The posting of advertisements, profanity, or personal attacks is prohibited.
Click here to review our Terms of Use.



MOST VIEWED STORIES
Harassing letters lead teacher to resign
Shooting victim remembered in Atchison
Accused rapist captured Thursday
Atchison bus driver out after April accident
Bus para without job following medication investigation
Fake check for vehicle sends man to jail
Horton man arrested after found hiding in home
KS/NE fugitive found in Utah
Area law enforcement partner for operation
Push for Atchison skateboard park goes before Commission
Click Here For All Stories

LATEST STORIES
KDHE awards several local waste reduction grants
Substation ceremony placed on hold
MDC Encourages Motorists to Give Turtles a Brake!
Report: nearly half of KS wheat in poor shape
Humane Society requests financial support from county
One injured in Jefferson County wreck
Shooting victim remembered in Atchison
Brown Co road closure planned
KDA Prepares to Oversee Industrial Hemp in Kansas
Funds Available to Help Mitigate Emerald Ash Borer Impacts
Click Here For All Stories

©2018 MSC News
Hiawatha, Ks 66434
EEO Public Report


Powered by Radio Media Group