Abstract: In recent years in certain main counties and cities producing Chinese date leaf rust mites have been found to cause increasingly serious damage. For the purpose of controlling mite damage and safeguarding production, the author of the present paper observed continuously for 4 years during 1985-1988 the biological characteristics of leaf rust mites on Chinese date trees, and conducted control experiments according to their regular pattern of occurrence. It was found that spraying lime sulphur at a concentration of 5 Baume on the tree before germination proved effective in killing the adult mites overwintering on the dates, and spraying 40% oxidized Rogor diluted 1000 times in late May also proved effective in controlling mites.

Key words: Jujube(Chinese date)leaf rust mites, Morphological traits, Habits and characteristics, Chemical control