DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 4-5/1978 str. 12 <-- 12 --> PDF |
Na osnovu mnogobrojnih pokusa u više zemalja može se na kraju zaključiti da Krenite zbog povoljnih toksikoloških osobina, neznatnog uticaja na okolinu i mogućnosti višestruke primjene predstavlja arboricid koji mnogo obećava u rješavanju problema zakorovljavanja u šumarstvu. LITERATURA 1. Delabraze , P. (1975.): Informations sur les possibilities d´utilisation du Krenite en Foret. Proc. Columa Paris, 130—142. 2. Niehus, M. H., Roedieger, K. J. (1976.): Ammonium ethylcarbomyl phosphonote a new growth regulator for the control of undesirable brush wood Proc. 12th British Weed control conf. Ill, 1015—1022. 3. Schwerdtfeger , W. (-976.): Ammonium ethyl carbamoyl phosphonate-a rievieu of progress with trials in forestry and non cropland areas. Proc. British Crop Protection Conference-Weeds, 83—90. 4. Schwerdtfeger, W. Allison, D. (1976.): »Krenite« a raport of five years experience presented at Brighton Conference British Crop Protection Conference- Weds, Brighton, 1—3. 5. Zitzewitz , H. (1975.): Was ist, was kann, was soil Krenite? Neue Möglichkeiten der der chemischen Kulturpflege. Forst und Holzwirt 16, 302—304. 6. Zitzewitz , H. (1976.): Mit Krenite zur waldschutzgerechten Kulturpflege. Allgemeine Forst Zeitschrift 33, 701—704. 7. Prospekti poduzeća du Pont de Nemours: Du Pont de Nemours, Biocemi cals Department Wilmington. Delaware USA (1974): Krenite Wachstum regulator zur Bekämpfung von unerwünschsten Baum und Strauchbewuchs. Du Pont Product Development Bulletin, Biocemicals- Department Geneve (1976.): Krenite — Brush Control Agent. SUMMARY Krenite — a new very promising arboricide Recently a replacement of less valuable degraded and broadleaved coppice forests by conifers has been performed aiming at increasing areas under forest, which will yield a higher-quality growing-stock volume. The essential problem appearing here is the protection of young plants against sprouts and weeds. The only possible efficient solution under current conditions is offered by chemical controlling of weeds. The new arboricide — owing to its favourable toxicological properties, insignificant influence on the environment and wide possibilities of application — represents a good solution against the weeding in forestry. Through experiments laid out in three areas of forest cultures, by applying two doses of Krenite (5 and 10 1/ha), it was established the following: Scots Pine (Pinus sylvestris L.) and Norway Spruce (Picea abies [L.] Karst.) were tolerant of both doses, while Black Pine (Pinus nigra Arn.) — at higher doses — showed on certain stunted specimens signs of depression. Of the represented undesirable vegetation sensitive to Krenite were: Sessile Oak (Quercus sessilis Ehrh.), Beech (Fagus sylvatica L.), Black Locust (Robinia pseudoacacia L.), Tartarian Ash (Acer tataiicum L.), Blackberry (Rubus fruticosus L.), June Berry (Amelanchier ovalis Med.), Banewort (Atropa belladonna L.) and Creeping Thistle (Cirsium arvense [L.] Scop.), while Goat Willow (Salix caprea L.), Flowering Ash (Fraxinus ornus L.), Obtuse-leaved Ash (Acer obtusatum Kit.) and Black Elder (Sambucus nigra L.) were more resistant to the effect of Krenite. The officiency of Krenite differed from that of other arboricides. |