Abstract Four insecticides were applied by drenching to the following greenhouse plants: Christmas cactus, Zygocactus sp var. Christmas Cheer; Coleus, Coleus sp var. Multicolor Rainbow; English ivy, Hedera sp; Impatiens, Impatiens holsti var. Shady Lady-Pink. The insecticides Diazinon 4EC, Vydate L, SBP-1382 and Malathion 2EC were selected as potential controls for fungus gnat larvae (Bradysia sp). Pesticides were mixed at the .5X, X, 2X and 4X label rates. The plants were grown in 4.5 in square pots and 200 ml of each mixed pesticide was added causing runoff from the pot bottom. The plants were drenched on Mar 28, placed in a greenhouse and evaluated every 7 days for 21 days.