Whitefly Biocontrol 

General predators used most are Delphastus and green lacewing. Delphastus is introduced early in hot spots (areas where there are lots of whitefly). Inoculative releases take 3 weeks to turn a generation that yields 100 times more beetles. Unlike lacewing, Delphastus don’t eat parasitized whitefly. Lacewing are more affordable in inundative numbers in regular releases or to maintain control of other pests besides whitefly. Encarsia formosa does best against Greenhouse whitefly (GHWF), Trialeurodes vaporariorum and will attack Bemesia (silverleaf or sweet potato whitefly).

Eretmocerus does best against Bemesia, woolly, citrus and bayberry whitefly, and will parasitize GHWF. GHWF adults are white, wings together parallel to leaf surface. Bemesia adults are yellow, wings slightly apart showing abdomen and at an angle to leaf surface. A fringe rings the edge of white GHWF nymphs and no eye spots are visible; Bemesia nymphs are yellow with no fringe, but eye spots are visible. GHWF lays eggs in circular patterns while Bemesia lays its eggs singly. High populations may need to be reduced with Beauveria (Naturalis), soap (Dr. Bronner’s), neem, or Hot Pepper Wax before introducing biocontrols.

Green Lacewing Products