The Garden Under Glass
Forfatter: William F. Rowles
År: 1914
Forlag: Grant Richards Ltd. Publishers
Sted: London
Sider: 368
UDK: 631.911.9
With Numerous Practical Diagrams From Drawings By G. D. Rowles And Thirty-Two Illustrations From Photographs
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PESTS AND THEIR EXTERMINATION 299
Scalding.—Can scarcely be called a disease, but is due rather to errors in ventilation. The vine is particularly affected by this, and it is invariably caused through not opening the ventilators early in the morning. As soon as the sun fairly strikes a vinery it should be given air by
Diagram 63.-Scalding, Shanking, Splitting: 1 : «, scalded vine leaf; b, scalded berries of grape. 2. Split bernes of grape.
opening the top ventilators slightly. . If not opened then, scalding will inevitably occur. Scalding is more like y o take place when the vines are flowering, and when stoning takes place. A sharp eye should be kept on the ventilation on days of alternate sunshine and cloud.
Scale.—Comes next to mealy bug as being an almost ineradicable greenhouse pest. At first it is o a ig yellowish colour, but later it becomes brown, an is very disfiguring. The same means as have been suggeste 01 mealy bug should be used against scale. Undoubtedly the