Control effect and application prospect of biological technology on prairie locust

Application prospects of locust control by new biological technology such as Nosema locustae, Metarhizium anisopliae, Azadirachtin were introduced in this paper. N.locustae is a kind of single cell eukaryotic protozoan which parasitizes on locust or other orthoptera insects. After 45days of the application, the infection rate was 50.6%, decreasing rate of locust was 73.4%. M.anisopliae is a kind of pathogenic fungi, its control effect on locust was 66.5% after 7days of application; and reached 76.7% after 12days. Azadirachtin is a bioactive substance extracted from A.indica seeds, 2days after applied 0.3% Azadirachtin, the effectiveness on locust was 95%. Application of biological technology such as N. locustae, M.anisopliae, Azadirachtin on locust control not only achieve high control effect, but also safe for human beings and livestock, no pollution to environment, therefore, protect ecological environment and reduce loss from pest.