396 Report of the Mycologist op the 



per acre less than the rows treated with Paris green in lime water. 

 There being but little fungus, this difference represents the differ- 

 ence between applying Paris green dry and applying it in lime 

 water. The Fungiroid and Paris green were applied according to 

 directions on the can, namely, at the rate of two pounds per acre, 

 applied on dry foliage with a Leggett powder-gun, and when there 

 was but little wind. Although this experiment furnishes no in- 

 formation as to the fungicidal value of Fungiroid we do not hesi- 

 tate to state that, in our opinion, the value of Fungiroid is so 

 small as compared with liquid Bordeaux mixture that it has no 

 claim to consideration from potato growers. Our opinion is 

 based: (1) On the fact that Fungiroid lacks the adhesive prop- 

 erty of Bordeaux mixture; (2) on the results of experiments at 

 other experiment stations in which the merits of Fungiroid and 

 Bordeaux mixture have been compared; (3) on the opinions of 

 eminent authorities on plant diseases. Prof. L. E. Jones, botanist 

 of the Vermont Experiment Station, experimented with Fungi- 

 roid and other forms of dry Bordeaux mixture on potatoes for 

 two seasons. From the results of these experiments he drawa 

 the following conclusion:* "When these powders were applied 

 dry, even in the most liberal amounts, they gave so little protec- 

 tion that their substitution for the ordinary or wet mixture is not 

 to be recommended under any circumstances." In an experiment 

 made by Mr. H. P. Gouldf at the Maine Experiment Station, 

 Fungiroid applied to potatoes increased the yield 10 per cent, 

 while wet Bordeaux mixture increased the yield 31 2-3 per cent 

 under parallel conditions. Prof. Galloway, J Chief of the Division 

 of Vegetable Physiology and Pathology, United States Depart- 

 ment of Agriculture, considers powder fungicides as a class much 

 inferior to liquid fungicides. 



The small yield on all parts of the experiment field was due to 

 poor cultivation. The experiment furnishes a striking! example 

 of the fact that spraying cannot be made to take the place of 

 cultivation. 



* Loc. cit, p. 98. 



tMe. Agrl. Exp. Sta. Bui. No. 28. 



t Rural New Yorker. Vol. LV. Aug. 8, 1896. p. 528. 



