Diglyphus isaea and Dacnusa sibirica are small (2mm) parasitic wasps used in gardens, interiorscapes, greenhouse and field crops to control leafminers. The mix is 90% Dacnusa sibirica and 10% Diglyphus isaea. The benefit of this mix is that they can sustain both cool and warm temperatures, and you get two parasite species with different modes of action for enhanced control.
Diglyphus and Dacnusa sibirica are shipped as pre-fed adults, and when established can protect a crop through the crop season. Diglyphus and Dacnusa are best introduced when leafminers are first seen or when soon expected. Diglyphus isaea works best between 60ø and 90ø F. Dacnusa has the advantage of operating at slightly lower temperatures, 55ø to 85ø F, so this combination provides enhanced leafminer control early in the season.
Adult wasps ?sting? active second and third instar leafminer larvae. The sting injects a paralyzing toxin into the leafminer larvae and halts feeding. Diglyphus oviposits eggs into the mine adjacent to the larvae. The adult wasp will also feed on the paralyzed leafminer. Diglyphus larvae hatch from these eggs and feed on the body and body fluids of the leafminer larvae, consuming the leafminer from the outside-in. Dacnusa oviposits directly into the paralyzed leafminer and consumes the host from the inside. Each adult female wasp will oviposit as many as 50 eggs in her lifetime.
Approximately two weeks after introduction, the presence of Diglyphus is recognized by short/stopped mines containing dead larva. The presence of Dacnusa can only be verified by disection of dead leafminer larvae. Reduction of leafminer numbers is a clear sign of success. When used early as a preventive measure, you may find very few leafminers, or none at all.
Optimum conditions for Diglyphus: between 75-90øF, relative humidity around 80%.
Significantly warmer or cooler temperatures will affect reproduction and development.
Adult wasps are active for approximately 3 weeks.
Development; egg-adult, at 68§F (20§C) ñ 16 days.
Storage: Store bottle upright 1-2 days in the dark at 6-10øC/43-50øF. DO NOT FREEZE.
Release rate: 1 wasp per 20-30 sq ft or 500-1,000/acre 1 or 2 weeks apart, minimum 2 releases recommended.
Can be used in conjunction with Beneficial Nematodes.
Request by Thursday 11:00AM for shipment the following week.
Preferred Shipping method: UPS Next Day.
Available in the Continental United States only
Live & perishable product sales, once shipped, are final, non-cancelable