hort.net Seasonal photo, (c) 2006 Christopher P. Lindsey, All Rights Reserved: do not copy
articles | gallery of plants | blog | tech blog | plant profiles | patents | mailing lists | top stories | links | shorturl service | tom clothier's archive0
Gallery of Plants
Tech Blog
Plant Profiles
Mailing Lists
    Search ALL lists
    Search help
    Subscription info
Top Stories
sHORTurl service
Tom Clothier's Archive
 Top Stories
New Trillium species discovered

Disease could hit Britain's trees hard

Ten of the best snowdrop cultivars

Plant protein database helps identify plant gene functions

Dendroclimatologists record history through trees

Potato beetle could be thwarted through gene manipulation

Hawaii expands coffee farm quarantine

Study explains flower petal loss

RSS story archive

Re: Thistles

  • To: Multiple recipients of list <iris-l@rt66.com>
  • Subject: Re: Thistles
  • From: "Jeff and Carolyn Walters" <cwalters@cache.net>
  • Date: Mon, 24 Feb 1997 19:12:44 -0700 (MST)

Patricia Wenham writes (Sunday, 23 Feb 97): 

> I have two suggestions for you to try when attempting to eradicate 
> thistles.  See your county extension agent.  They will give you 
> suggestions for various ways to eliminate them.
> If you have a county weed board see them.  If the type of thistle you 
> have is classed as a noxious weed they will assist you.  We have several 
> types of thistle here and some are classified as noxious weeds.  The 
> county has a group of seasonal employees who hand pull weeds each year 
> and they also offer chemical sprays at a reduced cost.  You may decide 
> which route you wish to take.

You must have a more user friendly local government than we do. In northern
Utah Dyer's Woad (Isatis tinctoria) - the stuff the ancient Britons used to
turn themselves blue - is a publicly classified noxious weed. Property
owners are responsible for suppressing it on their land. If they neglect to
do it, the county will do the job and bill the property owner.

With respect to thistles, I did obtain the following information from the
Proceedings of the 1996 Northeastern Weed Science Society.
	100% control of Canada thistle can be obtained by applying RoundUp at the
rate of 1.1 lb active ingredient (Glyphosphate) per acre when the weeds are
3 to 8 inches high. Applications at the rate of .75 lb Glyphosphate per
acre achieved 
93-95 % control of Canada thistle. 1.1 lb per acre translates into .04 oz
per 100 sq ft. Note that this is dry measure and refers to the active
ingredient in RoundUp, not the actual spray product. 

Jeff Walters in northern Utah (Zone 4)
"This is the Place" - still sunny and cold, and now windy,too - plants that
have begun to grow seem to be regretting it!

 © 1995-2017 Mallorn Computing, Inc.All Rights Reserved.
Our Privacy Statement
Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index