122 



UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. 



depend upon whether many of the eggs are deposited before they fly 

 about much. While numbers of moths may be caught in this way, 

 it is doubtful if it will ever prove of very great practical value. 



GRASSHOPPERS. 



These insects do a great deal of injury to vines every year in some 

 parts of the State. This year they have been abundant everywhere 

 and considerable damage has resulted.* In a vineyard twelve miles 

 east of Fresno forty or fifty acres of vines were completely defoliated. 

 These insects are generally most troublesome in new vineyard sections 

 or localities surrounded by large areas of uncultivated land. 



FIG. 12. Vineyard defoliated by grasshoppers. 



Life History, The eggs of the grasshoppers are laid in the ground 

 in the late summer or fall, and a decided preference is shown for uncul- 

 tivated land. These eggs are laid in capsules containing a large num- 

 ber, and are protected by a frothy or gummy substance which prevents 

 them from being affected by unusual weather conditions. The eggs 

 remain in the ground during the winter and hatch 'the folio wing spring. 

 The young grasshopper is similar in appearance to the adult, except 

 that the wings are lacking, but these are gradually acquired with molt- 

 ing. There is usually but a single generation, though in some parts of 

 the State there are probably two. 



