525 



applications were made to eggplants. This was move than was rcqnired to destroy 

 the insects. The foliage of the potatoes began to die abont the middle of Augnst, 

 so that no definite observations conld be made later. All applications were made 

 with a knapsack pnmp and Yermorel nozzle. The combinations were mixed imme- 

 diately before being aiiplied. 



None of the plants were attacked by fungi except quinces, so that it was only upon 

 these that some of the combinations could be tested as fungicides. Potatoes and 

 eggplants were used to determine Avhat action the combination Avould Inive upon 

 insects. 



The intention was to spray about every 10 days, but as much rain fell in .July the 

 applications were made more frequently. * * * 



The hydrate, the borate, and the chloride of copper were ai)plied to pumpkin and 

 squash vines, which are usually attacked by mildew {Oidinm crijaiphoides, var. cncur- 

 hitarnm), in order to determine their real value as fungicides more accurately than 

 could be done upon the quinces. The Bordeaux mixture was used for comparison. 



The fimgicides and insecticides used were as follows: 



(1) Ammoniacal carbonate of copper (3 or 1.5 ounces carbonate, 1 or 0.5 quarts 

 ammonia, 22 gallons water), Avith Paris green or London purjjle (1 pound, 200 or 300 

 gallons water). 



(2) Carbonate of copper in suspejisiou (3 or 1.5 ounces, 22 gallons water) with Paris 

 green or London purple (1 pound to 200 gallons Avater). 



(3) Sulphate of copper (0.25 or 0.5 pound, 22 gallons water) with Paris green or 

 London purple (1 jiound, 200 gallons water). 



(4) Hydrate of copper (0.5 pound, 22 gallons water) alone or with Paris green 

 (1 pound to 300 gallons water). 



(5) Hydrate of copper (0.25 or 0.125 pound, 22 gallons water) alone. 



(6) Borate of copper (0.5 pound, 22 gallons water) alone or with Paris green 

 (1 pound, 200 gallons water). 



(7) Borate of copjier (0.25 pound, 22 gallons water) alone. 



(8) Ammoniacal borate of copper (3 ounces borate, 1 quart ammonia, 22 gallons 

 water) with Paris green (1 pound, 200 gallons water). 



(9) Chloride of copper (1.5 ounces, 22 gallons water) alone or with Paris green 

 (] pound, 200 gallons water). 



(10) Chloride of copper (3 ounces, 22 gallons water) alone. 



Tlie following sninniary is taken from the bnlletin: 



1. Carbonate of copper. — (1) The action of the annnoniacal carbonate of copper as 

 a fungicide does not appear to be lessened by the addition of Paris green or London 

 purple. 



(2) The ammoniacal carbonate of copper gave better results as a fungicide when 

 used at the rate of 1.5 ounces dissolved in 1 pint of ammonia diluted with 22 gal- 

 lons of water than when 3 ounces of the carbonate and 1 quart of ammonia were 

 used. 



(3) The fungicidal action of a combination of the carbonate of copper, held in sus- 

 pension in water, and the arsenites is not marked. 



(4) ComVtinations of the ammoniacal carbonate of copper and Paris green or Lon- 

 don purple, or of the carbonate of copper suspended in water and these arsenites, 

 have a caustic action upon foliage as a rule. 



(5) Paris green renders the ammoniacal carbonate of copper more caustic than 

 does an equal amount of London purple. 



(6) But when London purple is ajiplied in connection with carbonate of copper 

 held in suspension in water the combination is more caustic than one in which an 

 equal amount of Paris green is used. 



2. Sulphate of copper. — (1) The effect of the combinations of the sulphate of copper 

 and I'aris green or London pmijle upon fungi was unsatisfactory. 



