Occurrence of Crown Gall and Growth Responses of Korean Raspberry Grown in Container Supplied with Nutrient Solution

다국어 초록 (Multilingual Abstract)

Although Korean raspberry (Rubus crataegifolius) cultivation has increased with the recent trend of conveni ence foods, the growers suffer from renovating the orchards due to the outbreak of Agrobacterium tumefacienswhich severely occurs in the raspberries every 3 to 4 years. This study was conducted to determine the inhibi tory effect of container cultivation on the occurring of A. tumefaciens in the Korean raspberry and to suggest ECrange and volume of the nutrient solution suitable to the raspberry. Two-year-old raspberries were suppliedwith a nutrient solution (NO3-N 4.6, NH4-N 3.4, PO4-P 3.3, K 3, Ca 4.6, Mg 2.2 me L-1) from bud burst toharvest in 50-L containers (non-woven fabric) containing peatmoss (44 L) and perlite (6 L) within non-heatingplastic houses in Gimhae and Jinju, Gyeongnam-province. When Agrobacterium sp. was inoculated to theplants in Gimhae, the container cultivation exhibited significantly lower tumor occurrence of 3.3%, in contrastto 54.5% of the conventional soil cultivation. On the other hands, the plants in Jinju were examined with 4levels of EC (0.8, 1.0, 1.2, and 1.5 dS m-1) combined with 4 volumes of nutrient solution (4, 6, 8, and 12 Lplant-1 per week). Shoot growth tended to increase with raising EC, but numbers of shoots and suckers ratherdecreased at EC 1.5. The EC 1.0 with volume of 12 L resulted in the greatest bush growth including number ofshoots and the pruned weight. The highest berry weight and yield were found in EC range of 1.0 to 1.2 at therate of 12 L. The results indicated that container cultivation supplied with the nutrient solution could decreaseoccurrence of A. tumefaciens and the appropriate supply of the nutrient solution increases growth of the Koreanraspberry.

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