Tip Top Bio-Control Eretmocerus Eremicus Beneficial Parasitic Wasps, Hanging Card of 5,000A Beneficial Parasitic Wasp That Thrives On Whiteflies Live insects from Tip Top Bio Are Expedited To Ensure Your Insects Arrive Quickly & Safely. Eretmocerus is a tiny 1 50th inch, goldish colored, native, flying wasp that does not bite or sting. Works well in hot dry climates. Eretmocerus lay their eggs under the nymphs of whiteflies. The larvae hatch out and eat the whitefly. Eretmocerus females also eat immature whitefly as a food source. Each