UWSA

  • UTAH’S NOXIOUS WEEDS
  • CONTACT US
  • HOME
  • RESOURCES
    • CALENDAR
    • NEWSLETTERS
    • NEWS ITEMS
      • PROJECTS
      • NEWS
      • FEATURE ITEMS
      • SPOTLIGHT
    • UTAH WEED LAW
    • PUBLICATIONS
  • ABOUT US
    • OUR LEADERSHIP
  • FUNDING
    • GRANTS
    • GRANT APPLICATION FORMS
  • NOXIOUS WEEDS
    • UTAH WEED LISTS
    • UTAH WEED LAW
    • WEED FIELD GUIDE
    • NEW INVADERS GUIDE
  • BIOCONTROL
    • UTAH BIOCONTROL
    • BIOCONTROL FIELD GUIDE
    • AVAILABLE AGENTS
PAY ANNUAL DUES

Payment Form

Enter the payment details and submit

Annual Dues

$125.00

Enter your details below

Spambot blocker question

6 - 1 =

Validating payment information...
Waiting for PayPal...
Validating payment information...
Waiting for PayPal...

Portfolio tags: biocontrol purple loosestrife

  • 0
siteadmin
January 29, 2021 / Published in

Hylobius transversovittatus

BIOLOGY: Adults emerge in late summer and live for up to 3 years. Adults are 8-12 mm long. Eggs are laid from June – August. Adults lay 1-3 eggs per day. Eggs are deposited in soil and hatch after 11 days. Larval stages may last for 1-2 years.

DESTRUCTIVE STAGE: Adult (leaf feeding) and larvae (root mining)

IMPACT TO HOST: Larvae mine roots while adults feed on foliage. Small roots can be destroyed within two years while large roots may die after several years of infestation.

REDISTRIBUTION: Adults are nocturnal and must be collected at night. Night collection can be difficult. Some laboratories rear H. transversovittatus on artificial diets. These are available free by contacting Amber Richman (435-830-4146). Adults can be released on plants or eggs can be released on roots. A typical release is 100-200 weevils. These should be used with Galerucella spp. for maximum control.

  • 0
siteadmin
January 29, 2021 / Published in

Galerucella spp.

BIOLOGY: Adults emerge from soil in April and June. Adults are 3-5 mm long and orange with brown stripes along the wings. Eggs are laid from May–September on stems and leaves in clusters of 3-6. Females produce up to 400 eggs. Eggs hatch in 12 days. Larvae feed on buds and leaves for 14 days. Larvae are small (3-4mm) and light green with brown to black spots. Pupation takes 7 days and occurs in the soil or in the spongy tissue of stems in standing water.

DESTRUCTIVE STAGE: Adults and larvae (feeding on buds and leaves)

IMPACT TO HOST: Adult and larval feeding results in stunted plants and reduced seed production. In some areas of Utah, complete control of purple loosestrife has been attributed entirely to biological control.

REDISTRIBUTION: Adults can be collected in sweep nets or by picking adults off of plants. A typical release is 250 adults. Collection is best in late April or early May. Adults overwinter in the ground so continuously flooded areas are not ideal for release. Also, beetles are very susceptible to insecticides used for mosquito abatement. If sprayed, most beetles will die.

  • 0
siteadmin
January 27, 2021 / Published in

Purple loosestrife

BACKGROUND: Purple loosestrife is a European plant probably introduced to the United States as an ornamental. It reproduces both by seed and creeping rootstocks. Infestations can impede water flow and replace beneficial plants, and thus displace wildlife. It can be found in shallow, marshy wetland areas and ditches.

OTHER COMMON NAMES:

DESCRIPTION: Purple loosestrife is a semi-aquatic creeping herbaceous perennial growing 6 to 8 feet tall. There are five to seven petals on rose purple flowers that appear in columns along the upper end of stems. Leaves are lance shaped with smooth margins up to 5 inches long. Bloom is in midsummer.

CONTROL: Biocontrol is limited in availability but control can be good to excellent. Herbicides with an aquatic label can offer fair to good control.

Categories

  • Award Recipients
  • Feature
  • Getting to Know
  • Projects
  • Publications
  • Resources

Latest News

  • Group of vehicles equipped with spray tanks.

    Hardware Wildlife Management Area

    Cache County 2022 The Cache County Management D...
  • Summit CWMA Garlic Mustard Trials

    Summit County 2020-2021 Summary During 2020 and...
  • Weed Workers examine water weed removed from water

    2022 Utah Weed Supervisor Training

    Box Elder County 2022 Introduction Each year we...
  • Rush Skeletonweed Root Boring Moth

    Boxelder County 2021 Introduction Rush skeleton...
  • Final Report Causey Knapweed SGMA

    Weber County 2017-2021 Summary Since 2017, Utah...

Archives

FIELD GUIDE

Noxious weed field guide for Utah

GET THE GUIDE

EXECUTIVE COMMITTEE

Kevin Bailey — President
Dave Bingham — Secretary
Brandon Hunt — Region 1
Cory Worwood — Region 2
Brad Winder— Region 3
Nate Belliston — Region 4

This website made possible through a grant from the USDA Forest Service

SITE PAGES

  • Utah noxious weed law
  • Newsletters
  • Cost Share Funding
  • Contact
  • Leadership

NEWS

  • Award Recipients
  • Resources
  • Publications
  • Feature

QUICK CONNECT

KEVIN BAILEY- PRESIDENT

435 681 0428

info(at)utahweedsupervisors.org

In accordance with Federal law and U.S. Department of Agriculture policy, this institution is prohibited from discriminating on the basis of race, color, national origin, sex, age or disability. (Not all prohibited bases apply to all programs.) To file a complaint of discrimination: write USDA, Director, Office of Civil Rights, Room 326-W, Whitten Building, 1400 Independence Avenue, SW, Washington, D.C. 20250-9410 or call (202) 720-5964 (voice and TDD). USDA is an equal opportunity provider and employer.

TOP