Diglyphus isaea
Overview
Diglyphus isaea is one of the most important biological control agents for leafminer management. It attacks leafminer larvae inside plant tissue and is widely used in protected crops.
Type
Parasitoid wasp.
Target Pests
Primary Targets
- Leafminers
Identification
Adults are tiny metallic green parasitoid wasps.
Parasitised leafminer larvae stop feeding and development ceases.
Why Diglyphus is Important
Leafminers are difficult to control because larvae feed within leaves.
Diglyphus attacks larvae directly within mines and can significantly reduce population growth.
Environmental Preferences
Temperature
Optimal:
- 18–30°C
Crops Commonly Used In
- Cucumbers
- Tomatoes
- Ornamentals
- Herbs
Strengths
- Specialist leafminer control
- Excellent greenhouse performance
- Strong searching behaviour
Limitations
- Requires active leafminer populations
- Sensitive to incompatible sprays
Works Well With
- Leafminer monitoring programmes
- Preventative scouting
Monitoring Establishment
Look for:
- Reduced mine development
- Dead larvae within mines
- Adult parasitoid activity