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病害常见病害有炭疽病、叶斑病、黄化病、煤烟病等。1.炭疽病。一种常见的叶部病害。防治方法:种子带菌时,可用50℃温水浸种20分钟或55℃温水浸10分钟,捞出晾干后播种。也可用50%多菌灵可湿性粉剂500倍液浸种l小时,消灭种子表面的病菌。栀子花发病后喷洒25%炭特灵可湿性粉剂500～600倍液,或50%苯菌灵可湿性粉剂800～1000倍液、50%施保功可湿性粉剂800～1000倍液,连续2～3次,交替使用。
Disease common diseases are anthracnose, leaf spot disease, yellow disease, such as soot disease. Anthrax A common leaf disease. Prevention and treatment methods: seed carrying bacteria, available 50 ℃ warm soaking 20 minutes or 55 ℃ warm water soak 10 minutes, remove and dry sow. Can also be 50% carbendazim WP 500 times soaking seed l hour, eliminating germs on the surface of the seed. After spraying gardenia 25% charcoal WP 500 ~ 600 times, or 50% benomyl WP 800 ~ 1000 times, 50% Shi Bao power WP 800 ~ 1000 times for 2 ~ 3 times, alternating use.