Browsing 3. Scientific Journals / Naučni i stručni časopisi by Author "Graora, Draga"
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Biology and harmfulness of Brassica pod midge (Dasineura brassicae Winn.) in winter oilseed rape
Graora, Draga; Sivcev, Ivan; Sivcev, Lazar; Buechs, Wolfgang; Tomic, Vladimir; Dudic, Boris; Gotlin - Culjak, TanjaThe Brassica pod midge (Dasineura brassicae Winn.) is an important pest in oilseed rape (Brasica napus L.). It develops two generations per year and overwinters in the larval stage in cocoons in soil. Immigration of the ... -
Biology and harmfulness of Planococcus vovae (Nassonov) (Hemiptera: Pseudococcidae) in Belgrade area
Graora, Draga; Spasic, Radoslava; Ilic, SladjanaPlanococcus vovae (Nassonov) (Hemiptera: Pseudococcidae) is an important pest on plants of the family Cupressaceae. Its numerous populations have been present in recent years on Juniperus spp. in Belgrade. Feeding by ... -
Biology and Harmfulness of Unaspis euonymi (Comstock) in the Area of Belgrade
Graora, DragaUnaspis euonymi (Comstock) (Homoptera: Diaspididae) is a very dangerous pest of Euonymus spp. Numerous scale colonies and a high level of plant infestation provoke drying of leaves, branches and whole plants. As a result ... -
Natural Enemies of Pseudaulacaspis pentagona Targioni-Tozzetti in Serbia
Graora, Draga; Spasic, RadoslavaFive parasitoid and five predator species were registered on P. pentagona on 12 localities in Serbia and 27 in the area of Belgrade during 1997-2000. The parasitoid species registered were: Prospaltella berlesei (Howard), ... -
Weevils of the genus Ceutorhynchus Germ associated with oilseed rape in northern Serbia
Sivcev, Ivan; Sivcev, Lazar; Pesic, Snezana; Graora, Draga; Tomic, Vladimir; Dudic, BorisOur research of the genus Ceutorhynchus associated with oilseed rape was conducted in northern parts of Serbia (Stari Žednik, Subotica). A specific assemblage of eight weevil species was found. The most numerous were ...