04 Kas 2025 Salı
Preliminary study of economic insects on gall oak trees at North Cyprus and North Iraq
Abstract :The
current study was carried out during 2015 at two country, north Cyprus and north Iraq .Various sampling
techniques were used to collect different stages of insects
from all oak parts (root, stem, branches
and leaves). The study revealed the presence of 5 insect species belonging to 3
order and 5 families. The intensity of infestation varied from regions to
anther depending on tree age, agricultural practices and variation in food
preferences for gall oak by insects. The results of field study showed a
highest infestation by oak leaf cutter, Euproctis spp., on gall oak
trees in northern of Cyprus and Iraq with a mean infestation reached
(30.0, 67.5 %) respectively and a total mean were (86.7 %), followed gall
oak wasp,Andricus spp.(25.0,
56.2 %), respectively with a total mean
(72.2%), and oak fruit
weevil, Curculia spp. (7.5, 20.0%) respectively, total
mean (12.0%), while there was a lowest
infestation for oak moth, Lymantria dispar L. with infestation mean
reached (0 and 5.0%) respectively and
total mean were (6.8%). Generally , the percentage of the infestation were
highly on gall oak trees in north Cyprus with a general infestation mean
reached (50.5%) compared with insect infestations in north Iraq were (45.8%),
respectively. Field study results showed variation of
infestation by gall oak insects
according to the
kind of insect, climatic conditions and the part of plant that
has been infested, the most insects were observed from the beginning of April
month until end of
October in both region, with highly
infestation in month July and Augusts were reached (70, 85 and 68, 75%)
respectively, at mean temperature (29.0,
35.7c0 and 29.0, 35.1) respectively, relative humidity
(47.0, 44.7 and 50.0, 48.7%) and precipitation (1.0,0 and 0,0)
respectively. While a least infestation
at month October and March were reached (15 and 10%) respectively, during study
season
Infestation,
economic insects, gall oak, Cyprus, Iraq