GARDENING FOR ALL. 125 
A good solution consists of boiling a quarter of a pound 
of Quassia chips in one gallon of water for twenty minutes 
and adding two ounces of soft soap. For aphis upon the 
cherry, peach or plum, an extra ounce of soap may be 
requisite. 
An emulsion of soft soap and petroleum is very efficacious 
against many insect pests, and, if properly made and applied, 
will not be injurious to the plants. This may easily be made 
by boiling together, and constantly stirring whilst boiling and 
cooling, one pound of soft soap, half-a-pint of petroleum, and 
one quart of water; this will be sufficient to make sixteen 
gallons of insecticide for green aphis, or eight gallons for 
plum and cherry aphis. 
Spraying with Paris green at the rate of one ounce to 
sixteen gallons of water has also been found very efficacious. 
Paris green, when properly applied, is a great boon to the fruit 
grower. 
RED SPIDER.—(Tetranychus telarius). 
This is a minute insect very troublesome to many kinds 
of plants, especially in hot and dry weather. Although called 
a ‘spider’ it is in reality a mite, and they differ in size and 
colour according to variety. Heat and drought are favour- 
able to their propagation and general well-being; cold and 
wet are unfavourable. 
Applications of clear water will usually keep them in 
subjection, but where they have obtained a foothold stronger 
measures must be applied for their complete dislodgment. 
Spraying with Paris green, at the rate of one ounce to 
sixteen gallons of water, has been quite efficacious upon many 
out-door trees and crops, particularly gooseberries, currants, 
plums and apples. For delicate plants in greenhouses a safe 
mixture to use is sulphide of potassium, at the rate of half- 
an-ounce to one gallon of water. 
Another and more homely mixture is two ounces of soft 
soap to one gallon of water. 
The solution of sulphide of potassium is also efficacious 
against mildew, and tomato disease upon tomato leaves if 
properly applied. 
