Results of the study revealed the presence of four aphid species which
spread in the wheat fields of Daraa during 2013.
They are: Schizaphis graminum (Rondani), Rhopalosiphum padi (L),
Rhopalosiphum maidis (Fitch) and Sitobion avenae (Fab).
S. gr
aminum was most widely amounted rate (48%), followed by specie
of R. padi (% 20) then R. maidis (% 16.8), and finally specie of S.
avenae rate (14.9%).
The appearance time of the different stages insect (nymphs, winged
insects, winged) for its specie and their arriving time to the peak were
identify.
A survey of the natural enemies of woolly apple aphid Eriosoma lanigerum
(Hausm.) was conducted in unsprayed orchards in the mountain region of
Sweida, Syria. Twenty-six species were found, belonging to Coleoptera,
Dermaptera, Diptera, Heteroptera
, Neuroptera. Coccinella septempunctata L.
was the most abundant predator at the beginning of the season. The coccinellid
Oenopia conglobata (L.) occurred in less numbers and had a secondary
importance. Predatory bugs had a high activity in summer. Also, the aphelinid
parasite, Aphelinus mali (Haldeman), was observed with a high effectiveness at
late summer and at the end of the growing season.
