Gladiolus: Thrips
categories: Bulbs Gladiolus Gladiolus Insects Ornamentals
last review date: 2025-10-30 05:00
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
Use Integrated Pest Management (IPM) for successful problem management.
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: Visit Home and Garden Fact Sheets for more information on using pesticides.
Carefully read and follow label instructions.
Approved Pesticides
Examples of pesticides that are legal for home use in Washington State are listed below.
The list may not include all products registered for this use.
WSU Extension programs and employment are available to all without discrimination.
Evidence of noncompliance may be reported through your local Extension office.