DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 7-8/2010 str. 79 <-- 79 --> PDF |
M. Glavendekić: PARASITOIDS AND HYPERPARASITOIDS OF ERANNIS DEFOLIARIACL. ... Šumarski list br. 7–8, CXXXIV (2010), 403-410 brown soil. 12. Forest Unit Zlatica, compartment 96a forest type beech and sessile oak (Querco-Fagetum typicum) on acid brown and lessive acid brown soil. 13. Forest Unit Kožica, compartment 30b – forest of sessile oak andTurkey oak (Quercetum petraeae cerris pauperum) on acid brown and lessive acid brown soils. 14. Forest Unit Kožica, compartment 31a – forest of submontane beech (Fagetum submontanum) on deep eutric brown soils (brown forest soil and brown soil on loamy sediments). 15. Forest Unit Bukovik, compartment 4a – coppice forest of Hungarian oak andTurkey oak with Eastern hornbeam (Quercetum frainetto - cerris carpinetosum orinetalis) on dystric and eutric brown soils. 16. Forest administration Raška, Forest unit Kosovac – coppice forest of Hungarian oak andTurkey oak with Eastern hornbeam (Quercetum frainetto - cerris carpinetosum orinetalis) on dystric and eutric brown soils. RESULTS – Rezultati Biology and population dynamic of mottled umber moth Biologija i populaciona populacijska dinamika velikog mrazovca Erannis defoliaria Clerck, 1759 – Mottled umber moth, Grosser Frostspanner, ...................., veliki mrazovac. During our study the first adults were found in the third decade of November, and the last ones in the first decade of January. Females oviposit individually or in small groups around the buds, in bark crevi- Figure 1 Caterpillars of E. defoliaria Slika 1. Gusjenice E. defoliaria ces or in other hidden places. Caterpillars can vary in the colour (figure 1). It was recorded in all localities, most often in a lower population density. In Forest unitMiroč, however, it was dominant (65% of early season defoliator population). It exceeded threshold on the locality National Park Djeradp in Forest unit Zlatica, comp. 54f in 2002 (213 larvae/1000 leaves). In compartments 101, 95 and 55 relative abundance was from 98–123 larvae/ 1000 leaves in 2009. Winter moth population dynamics has been studied in different forest types. It was found out that frequent outbreaks are characteristic for the following forest types: forest ofTurkey oak and sessile oak (Quercetum petraeae-cerris) on brown and lessive brown soil on serpentinite; forests of sessile oak (Quercetum montanum typicum) on acid brown soil; in the forest of Hungarian oak and Turkey oak with Eastern hornbeam (Quercetum frainetto-cerris carpinetosum orientalis) on dystric and eutric brown soils; in the association Orno-Quercetum pubescentis-virgilianaeand in the artificially established stand of mixed oaks at Mala Moš ta nica. In plantations of pedunculate oak with hornbeam in forest unitVisoka šuma Lošinci outbreaks of winter moths are frequently observed.Winter moths occur regularly, but as a rule there are no outbreaks in the forest of sessile oak, Turkey oak and hornbeam (Carpino-Quercetum petraeae-cerris) onbrown forest soil and lessive brown forest soil. Distribution and bioecology of mottled umber moth parasitoids Rasprostranjenje i bioekologija parazitoida velikog mrazovca During our study on parasitoids ofE. defoliariain oak forests following species were recorded: Protapanteles immunis Haliday, 1834 (Hymenoptera: Braconidae) is a parasitoid ofE. defoliariaandA. marginaria caterpillars. It is recorded in Forest units: Mala Moštanica, Rađenovci,Visoka šuma, and Bukovik. Cotesia limbata Marshall, 1885 (Hymenoptera: Braconidae) was recorded in several localities as the parasitoid of A. leucophaearia,E. defoliaria and O. brumatacaterpillars. It was found in Forest unit Mala Moštanica andVisoka šuma Lošinci. Figure 2 Larvae of E. defoliaria with Braconidae Slika 2. Larva E. defoliaria sa brakonidom |