Effects of intercropping cauliflower with cabbage or radish on the population of aphids (Myzus persicae Sulz., Aphis gossypii Glover & Brevicoryne brassicae L.), white cabbage butterfly (Artogeia rapae L.) and the diamond-back moth (Plutella xylostella L.) were studied during two successive winter seasons (2005-2006) and (2006-2007). Results showed significantly effect for reducing infestation with the insect pests of cauliflower intercropped. Intercropping with cabbage reduced aphids and A. rapae populations than the monoculture. While intercropping with radish, the P. xylostella population was reduced than the monoculture. High numbers of aphids and A. rapae were detected in December during both seasons. While, November  was the preferred month for P. xyslostella.