ビワ樹生育中の銅剤施用期間とがんしゅ病の発病との関係

概要

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Thirty-two seedlings of one year old healthy loquat plants were planted in the field of the Nagasaki Fruit-Tree Experiment Station and inoculated with canker pathogen, Pseudomonas syringae pv. eriobotryae, at a part of their growing terminal buds of each test seedling in February, 1980. The effects of the applications of Bordeaux mixture during the former half, the latter half and the whole of nine years of the test period from March, 1980 until November 1989 on the disease incidence were compared.Original inoculum used in the test was a type redistant to streptomycin and belonging to the A group which does not form holo lesions on the leaves and does not produce brown pigments on Wakimoto's agar medium. At the end of the test period, the lesions were collected and identified the type of the pathogens isolated, to determine their origin. Most of the isolates were the type used for the original inoculation. The best control effect was shown in the plot treattd with Bordeaux mixture during the whole test period followdd by that treated during the former half, that trdated during the latter half of the test period and thd untreated plot. The results show the importance of the application at early growth stages of the loquat plants.
日本植物病理学会の論文
1992-04-25