Spraying in 1891. 109 



of value in wet seasons as well ; l and it is at present considered 

 as possessing more value to the apple grower than any other 

 single compound which he has at his command for checking 

 fungous and insect enemies. 



It is singular that while our most reliable insecticide, Paris 

 green, is found to possess value as a fungicide, the Bordeaux 

 mixture, which is probably our best fungicide, should possess 

 a marked insecticidal value. In some notes which appeared in 

 the Journal of Mycology (Vol. vii. 27), Hatch, of Ithaca, Wis., 

 says that in treating potatoes it was noticed that plants sprayed 

 with the Bordeaux mixture suffered less from insects than 

 those used as checks, and "it would thus appear that where 

 the mixture is used for rot and blight it may also be efficient 

 as an insecticide." Professor Jones, of Vermont, gave still more 

 positive information of the same nature at the Brooklyn meet- 

 ing of the Society for the Promotion of Agricultural Science, 2 

 although his remarks applied particularly to injuries from the 

 flea beetle. Beets were protected in a similar manner. Gallo- 

 way writes me as follows regarding the experience of the 

 government experimenters : " We also had a striking case a few 

 years ago in treating a large vineyard. The leaves on the 

 plants of our check plats were all badly eaten by the grape-vine 

 fidia, while those adjacent, sprayed with Bordeaux mixture, 

 were not touched at all." 3 



In 1891 Chester made a comparative test of some fungicides 

 which at that time seemed to be of value, but which were not 

 in general use. 4 Applications were made to pear trees, the fol- 

 lowing formulas being used for preparing the fungicides : 



C. Copper carbonate 1 pound. 



Water 25 gallons. 



G. Copper sulphate 8 ounces. 



Soda hyposulphite 14 " 



Water 25 gallons. 



1 Cornell Agric. Exp. Sta. Bull. 48, 272. 



2 Agricultural Science, Vol. viii. 364-367. 



3 See Ann. Rtpt. Ky. Agric. Exp. Sta. 1890, 40 (distributed early in 1895), 

 for experiments made by Garman on tobacco worms, grasshoppers, and potato 

 beetles, in 1889, these being the first of this nature ; also Cornell Agric. Exp. Sta. 

 Hull. 86, 58, for the prevention of insect injuries to apples ; Ann. Rept. Vt. Agric. 

 Exp. Sta. 1894, 12, 81, 95 et seq. 



* Del. Agric. Exp. Sta. 1892, Bull. 15, 5. 



