INSECTS INJURIOUS TO COTTON 



255 



farm during the winter and early spring; (2) spraying of culti- 

 vated plants around the dwellings with a contact insecticide; 

 (3) maintaining a finely pulverized surface soil; (4) destruction 

 of early infested plants on large areas of heavy infestation by 

 plowing up and burning; and finally, if the infestation is more 



FIG. 219. The common red spider (Tetranychus telarius): 1, the egg; #, the 

 newly-hatched larva; 3, the recently molted protonymph; 4, the mature 

 deutonymph just prior to the final molt; 5, the adult female. Highly 

 magnified. (After McGregor and McDonough, Bull. 416, U. S. Dept. 

 of Agr.) 



or less general, (5) spraying the cotton plants with one of the 

 following contact insecticides: Potassium sulphide, lime-sulfur, 

 kerosene emulsion, or a flour-paste solution. " 



