V. MANOLOVA and Z. RANKOVA
Fruit Growing Institute, BG-4004 Plovdiv, Bulgaria
MANOLOVA, V. and Z. RANKOVA, 2005. Economic results of using herbicides in the production of Yellow plum (Prunus cerasifera) and peach seedling rootstocksBulg. J. Agric. Sci., 11: 159-163
Based on a trial conducted during the period 2001-2003 in the experimental field of the Fruit Growing Institute in Plovdiv, the economic efficiency of herbicide application in the production of seedling rootstocks of Yellow Plum (Prunus cerasifera) and peach was estimated. A complete system for chemical weed control in the fruit tree nursery was developed and its economic results were analyzed for the first time. To estimate the efficiency, the following indices were used: value added (lv/ha), rate of economic return over weed control costs, cost efficiency coefficient.
It was established that the opportunity chemical control costs in the nurseries were relatively low - just 3-4 % of the yield obtained. A very high efficiency of the herbicide application was proved, as compared to hand weeding, the rate of return and the efficiency coefficient being from 16 to 36 and from 18 to 43 times higher, respectively. Most effective was the use of the herbicide Stomp 33EC - 400 ml/da, followed by Sinbar 80WP - 100 g/da and Devrinol 4F - 400 ml/da. The economic evaluation of the whole chemical weed control system applied for the production of seedling rootstocks showed that most efficient was the variant of herbicide Roundup 1 l/da + Fusilade forte 90 - 130 ml/da + Stomp 33EC 400 ml/da.