INSECT PESTS AND THEIR CONTROL 263 



according to Prof. F. M. Webster. Wheat should not be planted on the 

 same ground two years in succession. 

 Bur. Ent. Cir. 106. 



REFERENCES 

 "Insects Injurious to the Household and Annoying to Man." Herrick. 

 "Injurious Insects: How to Recognize and Control." O'Kane. 

 " Manual for Study of Insects." Comstock. 

 "American Insects." Kellogg. 



"Insect Pests of Farm, Garden and Orchard." Sanderson. 

 Connecticut Expt. Station Bulletin 186. "Gipsy Moth." 

 Missouri Expt. Station Bulletin 134. "Insect Pests of Field Crops." 

 New Jersey Expt. Station Circular 46. "Hessian Fly." 

 Utah Expt. Station Bulletin 138. "Control of Grasshoppers." 

 Canadian Dept. of Agriculture Bulletin: 



150. "Common Fungous and Insect Pests." 

 Farmers' Bulletins, U. S. Dept. of Agriculture: 



344. "Boll-Weevil Problem." 



498. "Methods of Exterminating the Texas Fever Tick." 



512. "Boll-Weevil Problem." 



543. "Common White Grubs." 



564. * "The Gipsy and Brown Tail Moth: Their Control." 



634. " The Larger Corn Stalk Borer." 



636. "The Chalcis-Fly in Alfalfa Seed." 



637. "The Grass Hopper Problem and the Alfalfa Culture." 

 640. "The Hessian Fly." 



671. "Harvest Mites or Chiggers." 



