Bui. 924, U. S. Dept. of Agriculture. 
Plate I 
Fig. 
-Damage to Grapefruit by Rust Mites. 
Dark tear stains are found frequently on areas more or less russeted 
by rust mites, especially where the applications of rust-mite 
sprays were delayed. For all practical purposes, both tear-stain 
and russeting are absent from fruit kept free from rust mites. 
Note the zone of faint russet. 
Fig. 2.— The Work of Rust Mites on Grapefruit Sprayed in June 
with Bordeaux Mixture. 
In the zone of rust-mite activity injury is confined to the area not covered with spray. 
Near-by grapefruit trees sprayed on the same date with lime-sulphur solution (1-66) 
matured fruit entirely free from russeting or tear-stain. 
