사과 잎속의 무기성분(無機成分) 함량(含量)이 사과나무 반점낙엽병(斑點落葉病)의 발병(發病)에 미치는 영향(影響)을 구명(究明)하고, 사과나무 반점낙엽병균(斑點落葉病菌)에 대(對)한 Ca 화합물(化合物)의 균사생육억제(菌絲生育抑制) 효과를 조사(調査)한 결과(結果)는 다음과 같다. 사과나무 반점낙엽병(斑點落葉病)의 이병정도(罹病程度)에 따른 품종별(品種別) 피해엽율(被害葉率)은 이병성품종(罹病性品種)이 84.8%, 중도저항성품종(中度抵抗性品種)이 8.1%, 저항성품종(抵抗性品種)이 0.5%이었고 엽당병반수(葉當病斑數)도 같은 경향(傾向)이었다. 품종별(品種別) 발병율(發病率)과 잎의 무기성분(無機成分) 관계(關係)에서 CaO 함량(含量)은 이병성품종(罹病性品種)보다 저항성품종(抵抗性品種)에서 많았으며 7, 8월(月)의 발병율(發病率) 및 엽당병반수(葉當病斑數)와 상관계수(相關係數)(r)가 각각(各各) -0.551, -0.585, -0.485로 유의성(有意性)이 있는 부(負)의 상관(相關)이 있어 Ca가 사과나무 반점낙엽병(斑點落葉病)의 저항성(抵抗性)에 관여하는 것으로 추정(推定)되었으나 T-N, 는 품종간(品種間)에 차이(差異)가 없었다. 사과나무 반점낙엽병균(斑點落葉病菌)은 배지(培地)의 pH가 정도(程度)에서도 생육(生育)이 가능(可能)하였으며 CaO는 균사생육(菌絲生育) 저지(沮止) 효과가 있었다.

This studies was carried out to find the effect of inorganic matters of Apple Leaves on the occurrence of Alternaria leaf spot and calicium compounds on mycelial growth of Alternaria mali. Diseased leaf rate of Alternaria leaf spot of susceptible apple varieties was 84.8%, moderate resistant 8.1% and resistant 0.3% respectively and in No. of lesion per leaf, the tendency was same. CaO contents of apple leaves was contained much in the resistant varieties than susceptible one. It was estimated that calcium is one of factors on resistance to apple leaf spot by the results of relations among CaO contents and diseased leaf rate from July to August and No. of lesion per leaf was correlated significantly as r=-0.551, r=-0.585, -0.485 but in T-N, , there was no difference among varieties. Then, growth of Alternaria mali was possible in the media of which pH ranged up to , and calcium has effect of inhibition on growth of Alternaria mali.

• 尹在卓
• 李準琸