Numerous insecticides were tested for effectiveness of control of the cabbage looper, Trichoplusia ni (Hbn.); the imported cabbageworm, Pieris rapae (.L); and the cabbage aphid, Brevicoryne brassicae (L), on broccoli and cabbage. The insecticides Were applied as sprays, either alone or in combination, at weekly intervals. The most promising materials against all three pests were dimethoate and malathion (2qt.) alone or in combination with Perthane®(1,l-eliehloro-2,2-bis(p-ethylphenyl) ethane) or toxaphene. Pcrthane-Diazinon®(O,O-diethyl O-(2-isopropyl-4- methyl-6-pyrimidinyl) phosphorothioate), Dibrom®(O,O-Di- methyl-O- (1,2-dibromo-2, 2-diehloroethyl) phosphate), Thiodan® (6,7,8,0,10,1 0-hexaehloro-1,.5,5a,6,9,9a- hcxahydro-6,9-methano- 2,4,3-benzodioxathiepin-3-oxide), and Trithion®(S-(p-chloro- phenylthio) methyl 0,0-diethyl phosphorodithioate)-Perthane also gave good protection to broccoli. Guthion®(O,O-di- methyl S-( 4-oxo-3//-l,2,3-benzotriazine-3-methyl) phosphorodithioa te), Delnav®(2,3-p-dioxllnedithiol-S,S-bis, (O,O-diethyl phosphorodilhioate), Kepone®(1, 2,3,.5,6,7,8,9.10,10-Decaehlorotetracydo (.5.2.1.02,6O3,9,05,8) decan-l-one) and Kepone-malla- thion did not control aphid satisfactorily. Am. Cyanamid 18706 (O,O-dimethyl S-(N-ethylearbamoylmethyl) phosphorodithioat. e), Delnav, phosphamidon, and malathion (1 qt.) were not effective against the cabbage looper. All insecticides showed some burning of broccoli ill mid-September. However all traces of phytotoxicity disappeared by harvest time.