The book Fruit Trees And Black Spot Canker was written by author Joseph F Carpenter Here you can read free online of Fruit Trees And Black Spot Canker book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Fruit Trees And Black Spot Canker a good or bad book?
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Blue litmus-paper No change. If more lime is required it turns a red colour. Knife-blade If metallic copper precipitates on the blade the mixture requires more lime. The potassium ferroeyanide is the best and cheapest indicator. Bordeaux mixture is to be recommended where the disease is serious. In other places the use of lime-sulphur will be satisfactory and more economical, as besides its fungicidal value it has considerable insect icidsil value. SPRAY OUTFITS. As far as results in spraying f...or canker are concerned, the type of sprayer makes little difference providing thorough work is done. With old trees a sprayer will be required which will give higher pressure than is required on a younger tree, in order to fill all cracks in the bark. In all cases high pressure is an advantage from the standpoint of economy, as double pressure means approximately double quantity applied or double area covered. With the present scarcity of labour and the high labour values which prevail, this is a distinct advantage.
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