ENEMIES OF FAllM CHOPS. 99 



VIII. ENEMIES OF FARM CROPS. 



TREATMENTS FOU IXJURIOUS INSECTS AND 

 FUNGOUS DISEASES OF PLANTS. 



By Prof. E. S. Goff, of Wisconsin Experiment Station. 

 The value of the following treatments for preventrhg injury 

 to crops from insects and fungous diseases has been proved by 

 abundant experience. It is essential that the treatments be 

 given promptly and thoroughly. In the case of fungous dis- 

 eases, it is generally essential that the applications be made 

 before the disease appears, since they are preventive, rather than 

 curative. The treattnents considered most important are printed 

 in italics. As a rule, those not so printed need be given only 

 in seasons or localities in which the attack is serious.* 



Formulas. 



No. I. Bordeaux Mixture. — Places pounds of copper sulfate 

 in .'I cloth sack and suspend this over night in a wood vessel 

 containing 4gallons of water, immersing the sack. In another 

 wood vessel slake 4 pounds of fresh lime in as many gallons of 

 water. When the lime is cool, pour it and the copper sulfate 

 solution into a barrel and add enough water to make 45 gallons. 

 Apply at once with a force-pump, with spraying nozzle, stir- 

 ring frequently during the application. 



No. 2. Ammoniacal Copper Carbonate. — Dissolve i ounce of 

 copper carbonate in 3 pints of strong ammonia and add this 

 solution to 25 gallons of water. Apply as in No. i. No stir- 

 ring is required. 



No. 3. Copper Sulfate Solution. — Dissolve, as directed in No. 

 T, I pound of copper sulfate in 15 gallons of water. Apply 

 as in No 2. 



No. 4. Stir 4 ounces oi Paris green in 40 gallons of water, 

 and add \ pound of fresh lime, slaked in 2 quarts of hot 

 water. Apply as in No. i. 



No. 5. Bordeaux Mixture {^o. \), with Paris green added at 

 the rate of i ounce to 10 gallons. Apply as in No. i. 



* The following scheme for treating, crops is after a plan published by 

 the late Mr. E. G. Lodemann of Cornell University, in Trans. N. V. Siaic 

 Agricultural Society for 1893, pp. 176-179, 



