ISHS Acta Horticulturae 183: IV International Rubus and Ribes Symposium
THE EXTENT AND SIZE STRUCTURE OF HOLDINGS, HARVESTING METHODS AND SPECIAL PROBLEMS IN BLACKCURRANT GROWING IN NORWAY |
| Author: | A. Nes |
| Abstract:
The total area of blackcurrants in Norway is about 1500 hectares. However, only about 25% of the total production comes from holdings with more than 50 shrubs. Very few holdings have more than 5 hectares of blackcurrants and the average area is about 0.2 hectare. Last year the total crop was about 10 000 tons and the average yield was about 6 500 kg/hectare. Blackcurrants were produced on 1 200 holdings with more than 50 shrubs, whereof only 250 were over 0.2 hectare, and about 60 were larger than 2 hectares. The crop from about 100 hectares is harvested by 7 – 8 straddle harvesters. The "beating method" that is a combined manual and mechanical harvesting method for Ribes developed in Norway, is used in addition to some "pick your own". Our main problems with blackcurrants are found in connection with frost damage during winter, poor pollination and premature fruit drop. Spreading growth habit in several valuable cultivars is also a problem. Damage from pests and diseases may also occur, the most serious problems being associated with gooseberry mildew, Sphaerotheca mars-uvae, and big bud, Cesidophyopsis ribis. | |
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