EFFICIENCY OF SOME NATURAL OILS AND CHEMICAL SUBSTANCES AGAINST THE MITE, Varroa jacobsonl (Oud.) INFESTING HONEYBEE IN DIFFERENT LOCALITIES IN EGYPT

The present study was conducted at the apiary of Sakha. Agricultural
Research Station, Kafr EI-Sheikh and the apiary of Gimeza, Agricultural Research
Station. EI-Gharbia Govemorate during 2003 season to evaluate the efficiency of live
natural oils, i.e., clove. menthol. anise, citrus and comphor oil (1 & 2 cm³/tlive)
comparing with formic acid 60% and oxalic acid (40 gmlliter) for controlling varroa
mite. AU tested materials reduce mite population. Formic acid, oxalic acid and clove oil
were the most effective material on mites (98.40, 96.70 & 91.0% reduction) after the
fourth week of treatment; respectively. Statistical analysis indicates significant
differences between each of formic and oxalic acid and the live tested natural oils (1 &
2 cm³Jhive). Clove 011 gave the highest reduction (91.0%, 2 cm²/tlive) of varroa mite
comparing with menthol, anise, citrus and comphor (77.09. 74.80, 52.0 & 73.0%
reduction) after four weeks of treatment; respectively. On the other hand, clove,
menthol, anise, citrus and comphor oil with 1 cm³Jhive were less effect on varroa mite
(78.40, 70.54, 70.0, 45.14 & 68.23% reduction) after \he fourth week of treatment;
respectively. It could be concluded that beekeepers can use clove 011 (2 cm²/hive) and
each of fOTmlc acid 60% and oxalic ac1d (40 gmlliter) safely durfng winter and summer
season; respectively for controlling varroa mite.