Research in Plant Disease 2007;13(2):98-103.
Published online August 30, 2007.
거봉의 뿌리혹병 방제를 위한 저항성 대목 선발 및 월동법
강성수, 박상헌, 박문균, 박태진, 강희완, 최재을
 
Selection of Resistant Rootstock and Development of Overwintering Methods for Control of Crown Gall Disease on Grapevine
Sung Su Kang, Sang Heon Park, Mun Kyun Park, Tae Jin Park, Hee Wan Kang, Jae Eui Choi
Abstract
Grapevines will experience various types of winter damage. Some winter damages are caused by mechanical injury, freezing temperatures or poor vine vigor. This research was conducted to find out the appropriate control methods through selection of resistant rootstocks and improvement of overwintering methods for the control of crown gall disease on ``Kyoho`` grape. The crown gall symptoms were not found when three stock plants of grapevine SO4, 5BB and 3306 were inoculated with 104 cfu/ml of Agrobacterium vitis strains (YK2823, YK3312, LMG259, HKA234). But when they were inoculated with higher concentration (106 cfu/ ml) of A. vitis, irrespective of stocks plants, crown galls were formed all of them and the gall size was much smaller than that of Kyoho. Three stock plants were selected as resistant based on above mentioned. Covering trunks and branches with rice straw and insulating coverlet was the most effective method for prevention of crown gall disease. This treatment minimized the ambient temperature changes on grapevine trees during winter season to 9.6oC and the normal plant growth was due to the absence of freezing injury.
Key Words: Control, Covering, Crown gall, Grapeskin, Stock plant
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