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青岛张乃忠问:我养的几十盆杜鹃花生了黑斑病,贵刊介绍用多菌灵喷布防治,但苦于青岛无货,还有其他药剂可用吗? 答:杜鹃黑斑病主要是由于空气湿度大,霉菌孢子在盆内或地面上萌发,并蔓延到植株上来。除去使用多菌灵,也可使用波尔多液。波尔多液药剂好,可自己配制:用500克硫酸铜,放在25公斤水中充分搅拌溶化;用500克生石灰放在另一容器内的25公斤水中溶解。都化开后两种溶液兑在一起,边倒边搅拌,配制时不要使用金属容器,不要配好后再加水溶解,要一次配好用完。用量不多可以按比例斟减。在当地大量发病前往植株和盆土表面和地面喷布预防效果更好。
Qingdao Zhang Naizhong Q: I dozens of potted rhododendrons peeled melanocytopenia, your publication describes the use of carbendazim spray prevention and treatment, but suffer from the Qingdao stock, there are other agents available? A: cuckoo black spot disease is mainly due to Air humidity, mold spores in the pot or on the ground germination, and spread to plants up. Remove the use of carbendazim, Bordeaux mixture can also be used. Bordeaux mixture is good, can be prepared by themselves: 500 grams of copper sulfate, 25 kg of water in the full mixing and melting; with 500 grams of quicklime in another container 25 kg of water dissolved. After the two are open together with the solution, while pouring edge stirring, preparation do not use metal containers, do not mix well after the water dissolved, to a good time with a good run out. Small amount can be reduced proportionally. A large number of local incidence of plants and pentu surface and ground spray prevention effect is better.