Olive disease and its control
(I) Leaf spot Causes early defoliation in various planting areas in Shaanxi and affects growth. The lesions were yellow at the beginning and brown afterwards, showing an irregular distribution.
(b) Melasma is distributed in Hubei, Sichuan, and Shaanxi provinces. Cause a large number of fruit drop, severe disease branches dry. The pathogens overwinter in old diseased tissues, and rain and humidity encourage growth. In winter and spring, it is best to cut off the diseased branches.
(3) Brown leaf spot planting areas in Shaanxi caused defoliation and fruit drop. The pathogenic bacteria in the form of mycelia overwintering in winter, the new infusion occurred in the spring, high humidity favorably expands.
The prevention and treatment of these leaf spot diseases is mainly to strengthen field management: the winter and spring trimmed the diseased part, remove diseased leaves and diseased fruit in time, and perform 1% Bordeaux mixture or 40% wettable carbendazim 1000 times solution, or 50 % control of 800 times of tetromycin, or 0.4% zein spray control effect is good.
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