Dormant season control agent of fruit trees wintering disease

摘要

PURPOSE:To obtain an agent for controlling the resting stage of overwintering blight of fruit tree having improved sporulation preventing action and residual activity, high safety and excellent handleability by using 8-hydroxyquinoline copper as a main component and adding a specific organic acid and/or machine oil as an assistant. CONSTITUTION:The objective agent for controlling the resting stage of overwintering blight of fruit tree and having high safety can be produced by using (A) 8-hydroxyquinoline copper as a main compound and adding (B) one or more organic acids selected from oxalic acid, succinic acid, adipic acid, sabacic acid, fumaric acid, itaconic acid, crotonic acid and caproic acid and/or (C) machine oil preferably at a weight ratio (B/A) of about 0.3-3.0 and (C/A) of about 2.0-20.0. The combined use of the components A and B remarkably improves the sporulation preventing action, the addition of the component C promotes the residual effect and the combined use of the components A and C is effective in promoting the sporulation preventing action and enabling the simultaneous control of spider mite and scale louse of the resting stage.