En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Controlling <em>Rapistrum rugosum</em> (annual bastardcabbage)

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.

Need help with plant identification, visit the plant identification page.
 
rate this answer
Not Yet Rated

Friday - March 09, 2012

From: Austin, TX
Region: Southwest
Topic: Invasive Plants, Non-Natives
Title: Controlling Rapistrum rugosum (annual bastardcabbage)
Answered by: Nan Hampton

QUESTION:

The invasive, Rapistrum rugosum, seems to be especially ubiquitous this year. I communicated with Dr. Mark Simmons a few years ago regarding his research, which indicated that over-sowing with the native wildflower, "Indian Blanket," controls or even eliminates the Rapistrum. However, when I forwarded this information to the UT Maintenance Dept. here at the Pickle Research Campus, the suggestion fell on deaf ears. Can mowing of the Rapistrum in the Spring time (before it goes to seed) also help? Would the you be willing to share your information with UT Maintenance? I don't seem to be having much effect on them. Thank you.

ANSWER:

According to the USDA Plants Database Rapistrum rugosum (Annual bastardcabbage) is an annual.  Cutting them down before they set seed would certainly reduce the numbers that will be produced next year.  Mark Simmons said that some blooms can grow low on the stem and may be below the mower blade and survive the mowing.  Additionally, seeds that have fallen previously can lie dormant for an extended time and come up when condidtions are favorable. Texas Invasives.org recommends pulling them up by hand—including pulling up the taproot—as the most effective strategy.  However, I doubt that this strategy is one that the UT Maintenance Department is likely to use.  That said, cutting them before they set seed would certainly reduce the seed base available for next year's crop and it is a very straightforward thing to do.

 

More Invasive Plants Questions

Non-native and invasive bamboos from Staten Island, NY
May 19, 2013 - Hi I put some black Bamboo and some bias Bamboo in a large container about 6ft by 2ft and ht 18 inches .How can I get this Bamboo to thrive ? Suggestions on types of plant food or fertilizer or ant t...
view the full question and answer

Eradicating Campsis radicans in Kissimee FL
January 07, 2011 - I am interested in information on eradicating or controlling 'cow itch' [campsis radicans?] which is spreading on an empty lot of land adjacent to an occupied dwelling. It is causing significant dis...
view the full question and answer

Containing roots in Kaysville UT
October 26, 2009 - I'm planting my yard in all native Rocky Mountain and Great Basin plants. Is there a way to halt or contain the root propagation of Smooth Leaf Sumac and Quaking Aspen? I've considered digging dow...
view the full question and answer

Plant identification of tall stalk with many thorns
April 17, 2009 - Dear Mr. Smarty Pants: After we raked all the leaves, I found three or four plants on my property that are thin tall stalks with many thorns. Leaves are just growing, so I cannot describe them. ...
view the full question and answer

Getting rid of invasive grasses in backyard
July 17, 2010 - Mr. Smarty Plants, How do I rid my yard of invasive grasses? I am finding Bermuda, stickers, crabgrass and maybe even Johnson grass throughout my backyard. The invasion is substantial in one 200+...
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center