Vegetable and Field Crops 239 



all with Bordeaux, but were treated twice, July 3 and 20, 

 with Paris green in limewater, to control bugs. The Bor- 

 deaux mixture contained 6 pounds of copper sulfate to each 

 50 gallons of water, and lime to correspond. Paris green 

 was used at the rate of 1 pound to 50 gallons of mixture. 



The recommendation of the Geneva Station is: "Com- 

 mence spraying when the plants are six to eight inches high 

 and repeat the treatment at intervals of 10 to 14 days in 

 order to keep the plants well covered with Bordeaux through- 

 out the season. During epidemics of blight it may be neces- 

 sary to spray as often as once a week. Usually six applica- 

 tions will be required. The Bordeaux should contain 4 

 pounds of copper sulfate to each 50 gallons in the first two 

 sprayings, and 6 pounds to 50 gallons in subsequent spray- 

 ings. Whenever bugs or flea beetles are plentiful, add one to 

 two pounds of Paris green or two quarts of arsenite of soda 

 stock solution or three to five pounds of arsenate of lead to 

 the quantity of Bordeaux required to spray an acre. 



"Thoroughness of application is to be desired at all times, 

 but is especially important when flea beetles are numerous 

 or the weather favorable to blight. Using the same quan- 

 tity of Bordeaux, frequent light applications are likely to 

 be more efi'ective than heavier applications made at long 

 intervals. 



"Those who wish to get along with three sprayings should 

 postpone the first one until there is danger of injury from 

 bugs or flea beetles, and then spray thoroughly with Bor- 

 deaux and poison. The other two sprayings should like- 

 wise be thorough and applied at such times as to keep the 

 foliage protected as much as possible during the remainder 

 of the season. Very satisfactory results may be obtained 

 from three thorough sprayings. 



"A single spraying is better than none and will usually 

 be profitable, but more are better. 



"Except, perhaps, on small areas, it does not pay to 

 apply poison alone for bugs. When it is necessary to fight 

 insects, use Bordeaux mixture and poison together." 



