INJURIOUS INSECTS AND FUNGI. 279 



used, it must be applied when the foliage is wet with rain 

 or dew. When used in water, 1 tablespoonful to a 

 common 2-gal. pail of water is about the right quantity. 



ROSE-LEAF HOPPER (I't/jihtoryba rosea). This insect is 

 small, almost white in color, and flies or jumps about when- 

 ever the trees or bushes are suddenly jarred. It feeds upon 

 the green coloring-matter of the leaf, sucking out the 

 juices, making very numerous small white spots until the 

 leaf becomes very light green or almost white. It is 

 especially injurious to the rose, grape-vine, etc., though it 

 attacks some other shrubs and trees. 



Remedy. The remedy is thorough spraying with kero- 

 sene emulsion, or by the use of pyre thrum applied just at 

 night it may be kept under control. 



KKD SPIDER (Tetranicus telarius). This insect is so 

 minute as to be difficult to detect with the naked eye except 

 by the closest inspection until it has done considerable 

 mischief, when its work is shown in the light green or grayish 

 color of the leaves attacked. It works only in very dry and 

 hot weather, when it increases very rapidly and attacks a 

 great many kinds of trees and shrubs under the above con- 

 ditions. 



Remedy. As this insect cannot exist in a moist, cool 

 atmosphere, the spraying of the trees with cold water 

 applied with considerable force is a certain remedy, a heavy 

 thunder-shower often completely checking their work. 

 Dusting the foliage with flowers of sulphur when the leaves 

 are wet will also have a beneficial effect. 



APHIDES (ApJu's up.). There is hardly a species of tree 

 or shrub that is not more or less affected by aphides (or 

 plant-lice so called), yet but few of them are seriously in- 

 jured. One season they are abundant and do much harm, 



