Featured Research

from universities, journals, and other organizations

Kiss Mistletoe Goodbye This Season For Better Tree Health

Date:
December 17, 2002
Source:
Texas A&M University - Agricultural Communications
Summary:
Take mistletoe. Please. Trees infested with the sap-sucking parasite would like to kiss the Christmas novelty goodbye. And that may become easier -- even without holiday harvests -- due to new research at the Texas Agricultural Experiment Station.

COLLEGE STATION - Take mistletoe. Please.

Related Articles


Trees infested with the sap-sucking parasite would like to kiss the Christmas novelty goodbye.

And that may become easier -- even without holiday harvests -- due to new research at the Texas Agricultural Experiment Station.

"Mistletoe is unsightly and adversely affects the health of trees," said Dr. Todd Watson, Experiment Station urban forest researcher.

Watson completed the first year of a two-year study aimed at eliminating the pest from urban landscapes and found promising results with at least one new treatment -- a plant hormone.

The problem with mistletoe is that it stays with the tree until the tree dies. Spread by birds who eat mistletoe, the parasitic plant grows from seed deposited in bird feces on tree limbs. Watson said mistletoe left unchecked can cause die-back of tree limbs and occasionally the death of the tree, especially in drought conditions.

"Mistletoe grows into the wood of the tree, drawing water and minerals out," he said. "Mistletoe is a plant, so it makes its own nutrients from photosynthesis, but it is the tree's water that it pulls from and that weakens the tree and causes stress."

Yet that's oft overlooked. For hundreds of years, mistletoe has been associated with various cultures in countries around the world as a plant symbolic either of peace or of romance. Its yuletide custom of suggesting a kiss underneath suspended mistletoe apparently is linked to English tradition.

But arborists have a decided lack of love for this parasite, stemming from the fact that mistletoe is especially hard to kill without harming the tree in the process, Watson explained.

"One can repeatedly cut off mistletoe to prevent it from making seed and therefore spreading, but that is very labor intensive," he noted. "Or one can prune the infected branch, but that is only affective if there are a small number of branches with mistletoe.

"Some have covered affected limbs with black plastic to kill mistletoe by cutting it off from the sun," Watson added, "but that is as unsightly as the mistletoe and very labor intensive. A chemical currently labeled for use against mistletoe has not been very effective in totally eliminating mistletoe in one application when used at the recommended label rates."

To find a more reasonable, effective way to eliminate mistletoe, Watson tested eight different treatments in elm trees on the Texas A&M University campus. There was a controlled, untreated, group of trees; a group where mistletoe was pruned out; a group where entire branches were pruned; a group treated with the labeled chemical; a group in which the mistletoe infestations were covered with dark caulking; a group sprayed with glyphosate; a group treated with 2-4D; and a group treated with a specific plant hormone.

Watson said the trials were looking for at least 90 percent control in the 25 mistletoe plants treated in each group to be considered successful. The plant hormone yielded better than 90 percent control, he said.

The trial will be continued for another year and additional twists on the tests, such as developing formulations to improve the effectiveness of the plan hormones will be implemented, Watson said. If successful, the research said, the method likely will be patented for use on mistletoe throughout the United States.


Story Source:

The above story is based on materials provided by Texas A&M University - Agricultural Communications. Note: Materials may be edited for content and length.


Cite This Page:

Texas A&M University - Agricultural Communications. "Kiss Mistletoe Goodbye This Season For Better Tree Health." ScienceDaily. ScienceDaily, 17 December 2002. <www.sciencedaily.com/releases/2002/12/021217073242.htm>.
Texas A&M University - Agricultural Communications. (2002, December 17). Kiss Mistletoe Goodbye This Season For Better Tree Health. ScienceDaily. Retrieved December 17, 2014 from www.sciencedaily.com/releases/2002/12/021217073242.htm
Texas A&M University - Agricultural Communications. "Kiss Mistletoe Goodbye This Season For Better Tree Health." ScienceDaily. www.sciencedaily.com/releases/2002/12/021217073242.htm (accessed December 17, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Wednesday, December 17, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

When You Lose Weight, This Is Where The Fat Goes

When You Lose Weight, This Is Where The Fat Goes

Newsy (Dec. 17, 2014) Can fat disappear into thin air? New research finds that during weight loss, over 80 percent of a person's fat molecules escape through the lungs. Video provided by Newsy
Powered by NewsLook.com
The Hottest Food Trends for 2015

The Hottest Food Trends for 2015

Buzz60 (Dec. 17, 2014) Urbanspoon predicts whicg food trends will dominate the culinary scene in 2015. Mara Montalbano (@maramontalbano) has the story. Video provided by Buzz60
Powered by NewsLook.com
Rover Finds More Clues About Possible Life On Mars

Rover Finds More Clues About Possible Life On Mars

Newsy (Dec. 17, 2014) NASA's Curiosity rover detected methane on Mars and organic compounds on the surface, but it doesn't quite prove there was life ... yet. Video provided by Newsy
Powered by NewsLook.com
Ivory Trade Boom Swamps Law Efforts

Ivory Trade Boom Swamps Law Efforts

Reuters - Business Video Online (Dec. 17, 2014) Demand for ivory has claimed the lives of tens of thousands of African elephants and now a conservation report says the illegal trade is overwhelming efforts to enforce the law. Amy Pollock reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins