Gladiolus: Thrips
Photo by: R.S. Byther
Biology
Gladiolus thrips are tiny insects with feather-like wings, an unusual design in the insect world. They have rasping mouthparts that cause feeding damage characterized as elongated stippling on leaves and flowers, eventually making plant materials appear washed out.
Once thrips get into the flowers, they are nearly impossible to control.
Management Options
See "Using Integrated Pest Management (IPM) in the Landscape" for successful problem management techniques.
Non-chemical Management
Select non-chemical management options as your first choice!
- Inspect corms carefully for thrips before purchase.
- Wash corms vigorously over a drain, if thrips are found.
- Discard and destroy brown and corky corms.
- Preserve natural enemies, such as predatory mites, lacewings, and pirate bugs.
Chemical Management
IMPORTANT: Always read and follow label directions when working with pesticides.
For more information on using pesticides visit :
Carefully read and follow label instructions.
Approved Pesticides
If you choose to use a pesticide, some examples of products that are legal in Washington are listed below. Some products are labeled for just INDOOR or just OUTDOOR use, or may allow both uses. Be sure to choose a product appropriate for your situation. Always read and follow all label directions.
WSU Extension programs and employment are available to all without discrimination.
Evidence of noncompliance may be reported through your local Extension office.