トマト尻腐病に関する研究(第1報)

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  • Studies on the blassom-end-rot in tomato plants. 1

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1 トマトの尻腐病に対する品種間差異を検討すると共に, 窒素肥料及び摘果が, 発病に如何に影響するかを実験した。2 トマト19品種中, 福寿二号, Ponderosa, Sparks Earliana, 栗原, June Pink等が最も発病が多かった。3 結実状態が同程度の場合は, 茎長の大なる品種程発病し易いようである。然し結実状態の特に不良の場合は, 茎長と関係なく発病が少なかった。4 窒素肥料の増加に伴って発病率は増大し, 又茎長も大となり徒長的傾向を示した。5 摘果により1花房2個に果数を制限した場合は, 無摘果で数多く結実せしめた場合よりも発病率は滅少した。

1. Experiments have been conducted concerning the blassom-end-rot in tomato plants in relation to the varietal susceptibility, the nitrogenous fertilizers and the fruit-thinning. 2. Among nineteen varieties, Fukujiu-2, Ponderosa, Sparks Earliana, Kurihara, June Pink were sccffered from severer attacks of the blassom-end-rot than the others. 3. Bearing fruits equal degree, varieties having long stems seemed to be suffered from the disease more severely than the others hauing short ones. But, when fruiting was specially wrong, there could be found little of the disease regardless of the length of the stems. 4. According to the increase of nitrogen supply, fruits were suffered more severely from the disease and the plants hauing long stems looked weak. 5. When only two fruits were allowed to set on one cluster by practicing the fruit-thinning, the fruits were suffered from the disease less than when many fruits on one cluster without thinning.

source:Bulletin of the Faculty of Education, Chiba University

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