This study was conducted in the scientific apiary research in Agriculture
Faculty, Damascus University, it was applied on Syrian honeybee colonies, to
determine Euggenia caryophyllu and Majorana hortensis efficiency in
controlling Varroa jacobsoni
Oud., the treatments were varied, from spraying
bees with plant extracts, to smoke them by the smoker and feeding on the
extracts. These substances showed good efficiency to prevent Varroa jacobsoni
development in experimental colonies during three years until now, Majorana
hortensis gave a 71.88 % effect when sprayed and Euggenia caryophyllu gave a
62.49 % effect when sprayed too, when we used them only for one application.
