Profile: IPM Laboratories supplies beneficial organisms for the biological control of pests. We provide detailed information on the beneficial organisms they have ordered to ensure their successful use. We provide a fast and reliable supply of healthy beneficial insects. Aphidius ervi and Aphelinus abdominalis are tiny parasitic wasps that have ability to control potato aphids & greenhouse potato aphids.A single application of ScanMask™ beneficial nematodes is sufficient for preventing fungus gnat outbreaks or in the beginning phase of an outbreak. The nematodes do not attack shoreflies. They kill only fungus gnat larvae.