Strawberry 



367 



black. The adnlt hibernates during the winter, but in the 

 spring it sucks the juice of the growing plants, preferring to 

 obtain it from the young fruits, which are in consequence 

 dwarfed. Eggs are laid early in spring, and soon both adult 



FIG. 90. Strawberry leaf curled by the mildew. 



and immature forms may be found. A great many species of 

 plants suffer later in the season, and as there are from two to 

 four broods each year, much injury may be done. 



Treatment. Pyrethrum powder dusted freely upon affected 

 plants will destroy the insects ; this is probably the best rem- 



