2 4 o VEGETABLE FOES AND DISEASES 



begin to suck up the juices of the plant. There are 

 many generations of the thrips during the summer. 

 In the winter they remain relatively passive in the 

 perfect state in the cracks and crevices of the bark of 

 trees and similar sheltering positions. 



Prevention. As a rule the Pea plants are not 

 attacked until coming into flower, and then, sheltered 

 by the folded parts, the insects infest the foliage and 

 fructifying portions, and often completely arrest the 

 formation of flowers and pods. They seldom do any 

 mischief till the flowering stage is reached. It follows 

 that to prevent attack the steps taken must be ante- 

 cedent to the flowering, the plants being sprayed with 

 a wash, such as the following : (a) Take five or six 

 pounds of soft soap and dissolve them in twelve 

 gallons of hot soft or rain water, then add a gallon 

 of strong tobacco liquid that known as London 

 juice and spray on the plants during the evening of 

 a fine day. The following morning wash the plants 

 thoroughly with clear water, and in the course of 

 a few days repeat the treatment, for though the 

 first will destroy the insects it will not kill the eggs. 

 () Place one ounce of strongest shag tobacco in 

 a vessel and pour on it a quart of boiling water, 

 cover closely and allow to stand until cool, then 

 strain and sprinkle on the Pea plants with a fine-rose 

 watering can. This is very serviceable to small 

 growers, and it is easy to make any quantity for use 

 on a large scale, repeating at weekly intervals until 

 the Peas are well advanced in podding, (c) Boil five 



