none Entered The lesser date moth, Batrachedra amydraula Meyrick is one of the main insect pests of date palm in Sultanate of Oman. A survey of its natural enemies was carried out during the period April - June, 2006 in 11 date palm plantations in different regions. The survey revealed the presence of 6 parasitoid species (Goniozus sp. Bracon sp., Apanteles sp., Euderus near arenarius, Pediobius sp. and Euretoma sp.) as well as 2 predatory species (Chrysoperla carnea Steph. and an anthocorid). Ratio of the numbers of Goniozus sp.: B. amydraula in field samples of infested dates was 0.36: 1. The biology of Goniozus sp. was studied in the laboratory when reared on larvae of B. amydraula. Incubation period of parasitoid's egg averaged 36, 18 and 13 hours and the larval stage lasted 7.6, 3.4 and 2.6 days at 20[degree], 25[degree] and 30[degree]C, respectively. Respective durations were 13.6, 6.9 and 5.1 days for the pupa. Ovipositional period ranged 9-22 days, while the post-ovipositional period ranged 1-3 days. Goniozus female parasitized an average of 13.1 larvae of B.amydraula and deposited an average of 62.1 eggs during its lifetime which lasted 23.5 days. Sex ratio of the parasitoid was 1 male: 10 females in laboratory compared with 1 male: 5 females in infested field samples.