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保加利亚Kytustendil地区农业协会于2000￣2003年,对试验果园收集的16个苹果栽培品种进行了调查研究,所有品种都是1998年定植的,砧木是MM106。对每个品种的花期、果实成熟期、果实质量以及对晚春霜冻的抗性等4个生物学特性进行了调查分析。试验表明,chadel,jerseyred和RomebeautyNo5(瑞光5号)因其品质优良适宜在Kyustendil地区栽培。所有的品种对黑星病菌都表现敏感,但其侵染率有差别。Jupiter、Idagold品种感病力弱(侵染率小于5%),Kinsey、Orin(王林)品种感病力强(侵染率大于50%)。
The Kytustendil Regional Agriculture Association of Bulgaria conducted a survey of 16 apple cultivars collected from the experimental orchards from 2000 to 2003. All varieties were planted in 1998 and the rootstock was MM106. The four biological characteristics of each variety such as flowering period, fruit ripening period, fruit quality and resistance to late spring frost were investigated and analyzed. Experiments show that chadel, jerseyred and RomebeautyNo5 (Ruiguang 5) are suitable for cultivation in the Kyustendil region because of their high quality. All varieties are sensitive to the black star bacteria, but the infection rates are different. Jupiter and Idagold strains were susceptible (infection rate was less than 5%), and Kinsey and Orin strains were more susceptible (infection rate was more than 50%).