Chrysanthemum Leafminer (Phytomyza syngenesiae)
Leafminer causing serpentine mines in chrysanthemum and related ornamentals.
Chrysanthemum leafminer (Phytomyza syngenesiae) is a specialist leafmining fly of chrysanthemums and some related ornamentals. Larvae mine within leaves, creating pale serpentine trails and blotches that reduce quality. Biological control is achieved with parasitoids such as Diglyphus isaea and Dacnusa spp., supported by sanitation and removal of mined leaves.
Biological Controls for Chrysanthemum Leafminer (Phytomyza syngenesiae)
The species below are examples of beneficial organisms commonly used against chrysanthemum leafminer (phytomyza syngenesiae). Recommendations are based on published biological control information and practical IPM experience. Always confirm suitability for your crop, growing system and local conditions before use.
Diglyphus isaea
Environment: glasshouse
Temperature Range: 15.0 – 30.0°C
Rate: 0.25–1 wasp/m²
Frequency: Weekly introductions into affected blocks
Effective parasitoid for leafminer in ornamentals.
Further BioWiki Reading
For more background on pest biology, beneficial insects and environmental factors, use the BioWiki alongside this practical control guide.
Related Biological Solutions
Growers dealing with chrysanthemum leafminer (phytomyza syngenesiae) often also monitor these pests as part of a complete IPM programme: