234 SECOND THOUSAND QUESTIONS IN AGRICULTURE 



Strawberry Plant Louse (Myzus fragariafoliae). A light yellow 

 louse attacking the buds, blossoms and young fruit. Spray with 

 kerosene emulsion or tobacco washes. 



Orange Rust. Forms orange-red colored masses on the leaves, 

 which finally kill the plant. Dig out and burn all diseased plants as 

 soon as rust first appears. 



Leaf Spot of Blackberry and Raspberry. Produces small pale 

 spots on the leaves. Spray with weaker Bordeaux when leaves are 

 half grown and repeat every two weeks if necessary. 



Leaf Spot of Strawberry. This disease first appears as small 

 discolored spots upon the leaves, which destroy the tissues of the 

 plant. Spray before the flowers open with weaker Bordeaux. If the 

 disease appears late, mow off and burn the leaves. Spray the newly 

 appearing leaves with weaker Bordeaux. 



Powdery Mildew of the Strawberry. Produces a whitish powdery 

 covering on the foliage which soon kills the plant. Dust with sulphur 

 when the plants are wet. 



Crown Gall. Affects, especially, the blackberry. Dig vines as 

 soon as this trouble appears; there is no cure. Secure new, clean 

 stock and plant on fresh ground. 



Currants and Gooseberries. 



San Jose Scale. A small scale infesting the stalks. Spray when 

 dormant with lime-sulphur. 



Currant Stem Borers. Small white larvae which bore into the 

 stalks of the plants. As a preventive, wash plants in the spring 

 with soap solution. 



Imported Currant Worm. Attacks the leaves in the spring. 

 Dust plants with Paris green or hellebore when they are wet, or 

 spray with same. 



Leaf Hopper. Usually appears in great numbers on the under- 

 sides of the leaves. Spray with distillate and potash as soon as the 

 first ones are noticed. 



Currant Leaf Louse. Usually works upon the ends of the tender 

 shoots and stunts their growth. Spray with distillate emulsion. 



Leaf Spot. Produces large pale spots with brown borders upon 

 the leaves. Spray with Bordeaux as soon as first spots appear and 

 repeat as often as is necessary to keep down the disease. Spray 

 with weaker Bordeaux twice after fruit has been removed. 



Anthracnose of Currant. Produces small brown spots upon the 

 leaves, petioles, young canes, fruit stalks, and fruits. Spray with 

 Bordeaux before leaves appear and with weaker Bordeaux while 

 leaves are unfolding and repeat every three weeks until fruit ripens. 



Gooseberry Mildew. Produces a mildew upon the stems, leaves, 

 and particularly upon the berries, causing them to spoil. Spray with 



