During the 1985 and 1986 growing seasons in the Palo Verde Valley, CA, we obtained data on the effects of monocrotophos (Azodrin), and fenvalerate (Pydrin) and permethrin (Ambush) in combination with chlordimeform, on pink bollworm, (PBW), Pectinophora gossypiella (Saunders), oviposition. The mean (x = SE) number of nights oviposition was reduced to < 8% cumulative egg infestation on bolls was significantly (P < 0.05) longer for fields treated with monocrotophos (8.53 ± 0.7) compared with those treated with fenvalerate (6.3 ± 0.7) and permethrin (5.2 ± 0.5). The 8% boll infestation level is just above the estimated 6% treatment threshold. Pre- and post-treatment oviposition data are useful since they incorporate all lethal and sublethal behavioral effects such as delayed calling behavior, delayed response by males, delayed mating, and reduced oviposition.