Heliula undalr‘s Fabricius immature stages (eggs and larvae) in cabbage and cauliflower fields was carried out at Auseem village, Giza Governorate during two successive years; 2004 and 2005. Results revealed that this insect was abundant during late summer and the autumn, throughout the two years of study. On the two host plants, two high peaks of the larval population occurred in the 1‘“ year during July and October as compared with three ones in the 2"d year throughout the period from July to the beginning of November. It was found that August, September and October had the highest abundance of this insect as compared with May, June and December which had the lowest counts. July and November came to the second grade. Therefore, any attempt to control this insect pest, efficiently must be performed during late summer and the autumn.