Bui. 903, U. S. Dept. of Agriculture. 
Plate I 
Fig. 1. —Young raisin vineyard uninfested by Phylloxera. 
Fig. 2. — Old vinifera vineyard infested throughout with Phylloxera and showing empty spaces 
where vines have been killed; vine in foreground shows less infestation by Phylloxera than 
others near by, and would be rated at 7, but the canes show obvious stunting. 
The Grape Phylloxera in California. 
