1 / 11

Managing Yellow Starthistle in Yuba, Sutter, and Butte Counties: Impact and Control Strategies

Learn about the impact and control methods for Yellow Starthistle in Yuba, Sutter, and Butte Counties. Discover its deep tap root, toxicity to horses, and methods like mowing, grazing, Roundup, and biocontrol. Eradication vs. management, seed bank dynamics, and long-term commitment are discussed.

tatyana-neal
Télécharger la présentation

Managing Yellow Starthistle in Yuba, Sutter, and Butte Counties: Impact and Control Strategies

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Glenn Nader – Yuba/Sutter/Butte Co.

  2. Impact of YST • Deep tap root – mines water (66%) • Barbs - recreation

  3. Poisonous • Horses only • Alkaloid that destroys brain • Toxic to horses (600lbs) 1 to 3 months • Will not occur if there is sufficient feed • Fall is the highest report period

  4. Biology = Control • Annual • Germinates with sunlight and moisture • Seed viable for 3 to 5 years • Produces 50 – 200 million seeds/Ac • Requires 2 million to restock

  5. Eradication vs Management • Seed bank dynamics • 98% control to deplete seed bank • Eradication long term commitment 4-5 years

  6. Mowing • Annual plant • Start to flower (2-5%) • Cut below lowest branch or growth point • Mower cut at 4” • Grass competition –shade=>higher branching

  7. Competition • Bare soil – Sunlight • Rose Clover • Annual Rye • Harding grass

  8. Grazing • Managed into it by grazing • Light grazing Feb to March • Heavy mid April to June

  9. Roundup • Annual grasses • Spray 5 % flowering • With dye on clean up after 2 years Transline • Acidification

  10. Transline • ½ pint (1/4?) • Apply Jan to Feb • More than a single year program • Trans/Trans/Roundup w/dye • Rangelands • long term investment • Isolated patches • Susceptibility chart in handout

  11. Biocontrol • 5 insects released • 30% control at best • All feed on the seed head • Others have fed on other crops • Long term answer

More Related