بررسی تاثیر روغن امولسیون‌شونده EC در کنترل کنه زنگ مرکبات (Phyllocoptruta oleivora (Ashmead

Emulsifiable oils have been used as one of the control methods of citrus pests in the northern provinces for many years. Citrus rust mite is one of most important pest of citrus in the north of Iran. In recent years Mayonnaise oil caused damages on citrus fruits. In this research, the effect of emulsifiable oil EC with different concentrations in comparison with common treatments were studied on citrus rust mite (8 treatments and 4 replications) in a randomized complete block design. To evaluate the pest mortality, samples of leaves and fruits were collected from each replication, a day before, and 4 days after spraying. The number of mites on samples were counted under the stereo microscope. The rate of mortality was determined by using the Henderson – Tilton formula. The comparison of mean treatments were computed by Duncan's multiple range and T- student tests. The results indicated that there were significant differences among the treatments at 1% level of significant. Also, the results showed that application of different concentrations of emulsifiable oil EC were effective in reducing the pest population. By increasing the emulsifiable oil Ec concentration, the rate of pest mortality was increased. Emulsifiable oil EC in rate of 1.25% had the most mortality percent on citrus rust mite, and followed by EC 1%, Mayonese, EC 0.75% and EC 0.5% respectively. Mean mortality percent of pest in Abamectine + EC and Mayonnaise treatments was more than oil treatments. In general, it can be concluded that the use of emulsifiable oil EC at a concentration of 0.75 to 1.25% reduces citrus rust mite population to acceptable level and can be used to control the pest.