Occurrence and control of rust loquat [Eriobotrya japonica] fruit, Tate-Boya-Byo caused by loquat rust mite, Aceria eriobotryae
2007
Mihira, T.(Chiba-ken. Agriculture Research Center (Japan)) | Kadono, F. | Tanaka, C. | Shimojyo, M.
From 2000 to 2006, field surveys of rust loquat fruit (Tate-Boya-Byo) caused by the loquat rust mite were conducted in Chiba Prefecture. Suitable control methods for protected cultivation in Chiba Prefecture were evaluated. l. Tate-Boya-Byo occurred at a high rate of 22 to 63% in Minamiboso City and Tateyama City, and the fruit was damaged. 2. Loquat rust mites multiply inside the bract attached to the flower axis or the flower bud of the cluster from November to December when the loquat flower blooms. After that, the mites injure the young fruits. 3. The parasitic density of loquat rust mites in greenhouses that remove the upper plastic films in summer is lower than in greenhouses that are covered all the time. Removing the upper plastic films of greenhouses in summer is an effective pest control measure. 4. The parasitic density of loquat rust mites on 'Tomifusa' is highest in 'Tanaka' strain. 5. It was so effective for the loquat rust mite control to spray plants with Pyridaben, Mancozeb and Spirodiclofen. The optimum period for chemical control is from the middle to the last third of November.
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