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Ecological And Biological Studies Of Bemisia Tabaci Genn. (Homoptera:
Aleyrodidae) And Its Natural Enemies Along The Syrian CoastEcological And
Biological Studies Of Bemisia Tabaci Genn. (Homoptera: Aleyrodidae) And
Its Natural Enemies Along The Syrian CoastEcological And Biological Studies
Of Bemisia Tabaci Genn. (Homoptera: Aleyrodidae) And Its Natural Enemies
Along The Syrian Coast
Rafeek Abboud(1) and Mohammad Ahmad(2)
(1)General Commission for Scientific Agricultural Research
(GCSAR), Center in Lattakia, Lattakia, Syria
E-mail: elibcwan@scs-net.org
(2)Department of Plant Protection,
Faculty of Agriculture, Tishreen University, Lattakia, Syria
Abstract
The tobacco whitefly Bemisia tabaci Genn. (Homoptera: Aleyrodidae) was
reared on cucumber, tomato and cabbage at 27 C. Development of immature stage
lasted 18.43 days on cucumber and 21.17 days on tomato, and the differences were
significant. Most of eggs and first instar larvae developed on young leaves, the
second and third instar larvae developed on middle leaves, and most of the pupae
and empty pupal cases were found on old leaves. The insect appeared at the
beginning of May during 1999 and at late of May during 2000 in open fields. The
numbers of immature stages in august 1999 were 57.66, 16.13 and 44.49/ 1 cm² for
egg, larvae and pupae, respectively. Many predators and the parasite
eretmocerus mundus were present, which decreased the pest population
densities at the late summer and fall season
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