コンニャク葉枯病細菌の罹病小葉残渣, 球茎および土壌における生存

概要

論文の詳細を見る
The investigation was conducted to make clear the infection sources of the bacterial leaf blight of konnyaku (Amorphophallus konjac) caused by Pseudonomas pseudoalcaligenes subsp. konjaci. Survival of the pathogenic bacterium in the diseased leaflets, on corms and in soil was determined by using a selective medium. The bacterium could be isolated from the diseased leaflets kept for 422 days on the soil surface of natural field, but not be isolated 106 days after the leaflets were buried at a depth of 5 cm in field soil. As the result of application of debris of the diseased leaflets onto soil surface of field immediately after planting corms, the disease occurred obviously on new leaflets grown from corms planted. When artificially infested corms were preserved at 10 C of room temperature or in natural field soil, the bacterium could be recovered until 150 days after, namely until Apr. 14 in next spring. Survival of the bacterium in soil was longer at 5 C than at 25 C, but the bacterium could not be detected after 60 days at 5 C in natural field. These results indicate that the residues of diseased leaflets and corms infested with this bacterium may be served as main infection sources of the next konnyaku cultivation.
日本植物病理学会の論文
1989-12-25