Eretmocerus eremicus


These are live insects and MUST be shipped OVERNIGHT. No USPS or ground shipping. 

Eretmocerus is a parasitic wasp. This wasp is a native to the southwestern U.S. and is adapted to hot, dry climates. Eretmocerus are small wasps about .6mm (1/50 inch) long. They have a golden yellow thorax and abdomen. Males have thick antennae.Eretmocerus females lay their eggs under the nymphs of whiteflies. The eggs then hatch and the larvae penetrate and consume the whitefly. Approximately 2 weeks after the eggs are laid, parasitized whiteflies can be identified. The parasitized whitefly will be a golden color and you should see signs of a developing wasp inside the pupa. Adults should emerge within 20 days or so, leaving that distinctive little round emergence hole at one end of the whitefly pupa. Eretmocerus females will consume immature whitefly as a food source, puncturing and sucking out their body fluid. Eretmocerus will also feed on honeydew. Each female can produce 50 - 150 wasps. 

LIFECYCLE: Eretmocerus develops from egg to adult in about 3 weeks. Adults live for about 2 weeks. There are three larval stages, a prepupa and a pupa stage prior to adult. 

RELEASE INSTRUCTIONS: Eretmocerus are supplied mixed in bran or sawdust. The material can be shaken directly onto the leaf surfaces or placed in paper cups/pouches at the bottom of the plants. Once the material is dispersed throughout the crop, it should remain there for a few days. The parasitic wasp will immediately start their work. After about 2 weeks the first parasitized pupae should be seen in the crop. Once you have arrived home with you Eretmocerus, you must use them immediately. Eretmocerus eremicus cannot be stored. To release, empty contents of bottle into the leaves of infested plants. General release rates are about 1-2 wasps per 10 square feet every 1-2 weeks. Multiple releases are recommended. Eretmocerus are less sensitive to pesticides than Encarsia formosa. Many pesticides will have a negative effect on the development of Eretmocerus. Encarsia formosa and Eretmocerus can be used together. Avoid the use of systemic insecticides or pesticides with long residual action. 

RELEASE RATES: Note - These rates are for preventative control only, multiple releases and/or higher quantities are necessary for heavier infestations. 


3,000 Insects 1,500 sq. ft.
10,000 Insects 5,000 sq. ft.