DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 9-10/1988 str. 24 <-- 24 --> PDF |
38. S p a i ć, I., M i k 1 o š, I., 1981: Prvi pokusi suzbijanja jasenove pipe (Stereonychus fraxini Deger) Dimilinom. Jugoslavensko savjetovanje o primeni pesticida. Zbornik radova, sveska 3. Opatija. 39. Szontagh , P., 1987: Die Rolle der Insektengradation im Verlauf der Krankheiten von Traubeneichenbestanden. Osterreichische Forstzeitung, 3, 38. Jahrgang, Wien. 40. Vasić , M., 1965: Topolina pipa (Lepyrus palustris Scop.) kao štetočina mekih lišćara (morfologija, ekologija i ekonomski značaj), »Jelen« br. 2. Beograd. 41. 2 i v o j i n o v i ć, S., 1968: Šumarska entomologija, Beograd. Early Insect Pests and Their Significance in Foreset Protection Summary In forest protection the term »early insect pest« usually denotes that insect species which appears early in the spring damaging trees before the foliage is unfolded. On broad-leaved trees they feed upon flower and leaf buds, flowers and young leaves. To this group belong some of the most important defoliators of forest trees in this country: ash weevil, oak sawfly, brown-tail moth, oak leafrollers, winter moths etc. (table 1). Specific bioecological properties of individual species stand in the way of successful chemical control of early insect pests, particularly on large areas by means of aircraft. |