Re: Best way to Eliminate Quackgrass

Posted by Renglund on June 24, 2010 at 08:06:58 from (69.9.244.2):

In Reply to: Best way to Eliminate Quackgrass posted by fergienewbee on June 24, 2010 at 05:26:53:

An understanding of how the quackgrass grows will help avoid common errors in battling this plant. Quackgrass grows from underground rhizomes to an unmowed height of 1 to 4 feet. It has thin, flat, bright ashy green leaf blades. The seed spike grows from 3 to 8 inches long and appears in July. Quackgrass seed is often found in rye straw, so you may want to avoid using this as mulch in your garden. Each quackgrass plant produces about 25 seeds; they remain viable 3 to 5 years in the soil. It takes 2 to 3 months for a newly germinated plant to develop rhizomes. It is very important to eliminate the plants before they reach this stage.

Rhizomes (underground stems) are yellow to white, 1/8" in diameter, with distinct joints or nodes every inch or so. Each node is capable of producing fibrous roots, and sending a new blade of grass through the soil. The creeping rhizomes are so tough they can grow through a potato tuber, or push up through asphalt pavement. If left to grow, they will form a dense mat 4" thick in the upper part of the soil. One plant can produce 300 feet of rhizomes each year. Never use a rototiller where quackgrass is growing, because it amounts to propagating thousands of new plants from the chopped up rhizomes.

Chemical Control
The most effective way to eradicate quackgrass is by using a herbicide that contains glyphosate (Monsanto Roundup). It should be applied when there is no wind and when there will be no rain for 48 hours. The plant must be green and actively growing for best results. Glyphosate is a non-selective herbicide that will kill almost any green plant it contacts, and also can injure or kill woody plants. It is important to apply glyphosate only to the plants you want to eradicate.

One problem with using glyphosate on quackgrass is that up to 95% of the lateral buds on the rhizomes are dormant even though the plant is actively growing. Since herbicides are translocated from the leaves to actively growing plant tissue, after about 7 days the glyphosate degrades and the dormant lateral buds will start to grow new shoots. It may take more than one application to completely eradicate quackgrass.

One way to overcome lateral bud dormancy is to apply nitrogen fertilizer. This will break lateral bud dormancy, and the herbicide will be translocated to the now actively growing plant tissue and kill the entire plant. Repeat the application of glyphosate every 30 to 45 days; avoid cultivation for 2 weeks after each application.

Replies:

Add a Reply Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Optional Video Title: Optional Video URL: Advanced Posting Options Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.   Advanced Posting Tools   Upload Photo  Select Gallery Photo  Attach Serial # List  Return to Post

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]