BeneficialLeafminer

Leafminer parasitoid (Diglyphus) for leafminer

Diglyphus isaea · leafminer parasitoid

Against leafminer

Diglyphus stings Liriomyza larvae inside their mines and also host-feeds, so a working release shows within about two weeks as short mines ending in dead larvae. UC IPM says it works in greenhouses and shade structures that are screened to keep parasites in and new flies out. The 0.25–3 /m² rate is Koppert's greenhouse figure; for outdoor use Arbico gives 500–1,000 per acre every 2 weeks, 2–3 releases. Broad-spectrum sprays for other pests commonly trigger leafminer outbreaks.

Rate0.25–3 /m² per release, weekly, at least 3 releases

TimingAt the first mines; most effective at 59–77 °F (15–25 °C) (Koppert), which says Dacnusa may suit houses below 68 °F (20 °C)

TemperatureActive from 59 °F (15 °C); most effective at 59–77 °F (15–25 °C) per Koppert, 77 °F and warmer per Arbico

macro · leafminer parasitoid (diglyphus) on leafminer

The pestLeafminerLiriomyza spp.Pale winding tunnels inside leavesFull pest profile →

Before you order

Released weekly at the first mines in greenhouse vegetables and ornamentals; kills leafminer larvae inside the leaf and builds up fast in warm weather. How it works, how to tell it has established and the supplier list are on the full Diglyphus isaea profile.

Release calculator

How many do I need?

Area and infestation level in; quantity, cost and a weekly schedule out. Open the calculator →

Other controls for leafminer

Dacnusa sibiricaLeafminer parasitoid · 0.25–0.5 /m² per release, weekly, at least 3 releases