148 THE HOP. 



eelworm; b, ditto, broken, showing eggs and larvae. 

 IX, Eggs at different stages, and the young worm, 

 magnified 250 times. Dig out and burn infected plants. 

 Lime, one-half ton per acre, or sulphate of potash, 200 

 to 400 pounds per acre, are the remedies suggested. 



FUXGOUS PESTS BLIGHT, MOLDS, ETC. 



"Fire blast'* and ''red rust" are not common in 

 the United States, and the latter at least is due to an 

 insect (the red spider) rather than to a fungus. ^Mildew 

 and mold are also comparatively rare, though the 



FIG. 77. ASCOCARPS OF "HOP MOLD." 

 Autumn, or resting stage. Higbly magnified. 



attacks of lice often cause a blackened condition igno- 

 rantly called *'mold." Mildew is one of the worst pests 

 in England, and in damp seasons is almost equally de- 

 structive in Europe. The best account of the hop mold 

 or its treatment is Percival's, in the Journal of the Wye 

 (Kent) Agricultural College, under whose direction the 

 test has been carefully studied and experimented with. 

 Symptoms — Tn the earliest stages, the mold is seen as 

 small, light-colored patches, chiefly upon the upper surface 

 of the leavefi. If the nights are cold and damp and the hop 

 plants in a backward or weakened condition, the patches 



