Study of the Effect of Some Environmental Systems for Plant Protection in Production of Fruit in the Alpine Region of Central Rhodope Mountains | ПРОУЧВАНЕ ЕФЕКТА ОТ НЯКОИ ЕКОЛОГОСЪОБРАЗНИ СИСТЕМИ ЗА РАСТИТЕЛНА ЗАЩИТА ПРИ ПЛОДОПРОИЗВОДСТВО ВЪВ ВИСОКОПЛАНИНСКИТЕ РАЙОНИ НА СРЕДНИТЕ РОДОПИ
2011
Popescu, E., Experimental Station of Stockbreeding and Agriculture, Smolyan (Bulgaria)
The research was carried out during the period of 2004-2006 in the experimental field of Experimental Station of Stockbreeding and Agriculture in Smolyan, which is situated at the altitude of about 1530 m and in private farms in the region of Smolyan. Five systems, in conformity with the laws of nature including integrated ones, for dealing with diseases, pests and weeds of some fruit species cultivated in the region, were studied. The following indices were examined: degree of diseases and damages from pests, density of the most spread weeds. A positive effect of the applying of 5-7% solution of extract of bracken was established. This effect was shown in the damage of Aphis idaei and Abraxas grossulariata in Black and Red Currants was less. The infection with Monilinia cydoniae of quince and Polystigma rubrum and Taphrina pruni of plum and with Didymella applanata of raspberry was lower while there was one pre-flowering treatment with Bordeaux mixture – 1% and post flowering spraying with perotsin – 0.3% or with sistan – 0.03%. the development and spreading of Venturia pirini of pear and Venturia inaequalis of apple was stopped and limited by consecutive treatments with Bordeaux mixture – 1% before flowering, perotsin – 0.3% during flowering and sistan – 0.03% after flowering. The caused damages from the Laspeyresia pominella of quince, pear, plum and apple were reduced as a result of two treatments with zolon – 0.3%. The grassing with rye-grass, followed by cutting and using of the cut grass for mulching of row spacing and inter-row space is very effective mean for control of the weeding with Equisetum arvense L. and Sinapis arvensis L.
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