モモ幼木の凍害による主幹部障害と枯死樹発生に及ぼす台木品種の影響(栽培管理・作型)  [in Japanese] Effect of Rootstocks on Withering and Injury of Trunks due to Freezing Damage in Young Peach Trees(Crop Production & Cropping Type)  [in Japanese]

数種のモモ台木品種と岐阜県飛騨地域在来のハナモモに'白鳳','昭和白桃'を接ぎ木して凍害による主幹部障害,枯死樹発生に及ぼす影響を検討した.'おはつもも'台は3年生時から穂木部を中心に障害が発生し,4年生時にはすべて枯死した.これに対し'モモ台木筑波1号'台,'ハローブラッド'台および'国府HM-1'台は3〜4年生時に穂木部,台木・接ぎ木部ともに障害が発生したが,枯死には至らなかった.中でも'国府HM-1'台は,障害程度が最も軽症であり,障害発生抑制に有効な台木であると考えられた.一方,台木品種による穂木品種の発芽期,開花始期,展葉期に差は認められなかった.また,樹体生育量には差は認められたが,障害発生との関係は明らかでなかった.

Effects of freezing damage were investigated for several cultivar rootstocks and native selection of ornamental peach on withering and injury of trunks in 'Hakuho' and 'Shouwahakuto' peach trees. For 'Ohatsumomo' rootstock, injury occurred mainly in scions at 3 years old; plants died at 4 years old. In contrast, for 'Peach tree rootstock Tsukuba-1' 'Harrow Blood', and 'Kokuhu HM-1' rootstocks, injury occurred in scions and rootstocks at 3-4 years old in some trees, but the plants did not die. 'Kokuhu HM-1' was the most tolerant to cold injury in four rootstocks examined. It was inferred to be effective for avoiding injury. The period of bud break, flowering and leafing showed little difference. Vigor of trees did show a difference, but its relation to injury was not clear.