14 



N. II. AGE. EXPERIMENT STATION. 



[Bulletin 161 



The first six plots were in a different orchard from the last four. 

 All of the trees were Baldwins. There was no scab nor fruit spot 

 on any of the plots. The leaf spot was reduced 50 per cent, or more 

 on every plot treated with a fungicide. Bordeaux caused the most 

 injury of any of the mixtures used, but the per cent, of russeted fruit 

 on the copper-sulfid plot was quite high. The results obtained on 

 the iron-sulfid plot mark this mixture as a promising fungicide. It 

 is interesting to note that Waite obtained very satisfactory results 

 with the iron-sulfid solution. The lime-sulfurs held the leaf spot 

 in check and caused little or no injury. The data on plots 8 and 9 

 together with similar results obtained the preceding year make it 

 evident that Paris green and arsenite of lime are unsatisfactory in- 

 secticides to use with lime-sulfur. Making the arsenite of lime with 

 an excess of lime according to Stewart's formula and adding lime 

 with the Paris green alike failed to remedv the matter. 



SUMMARY AND CONCLUSIONS. 



No fungicide has been found that holds diseases in check as well 

 as Bordeaux. When showers follow soon after an application of 

 Bordeaux the leaves are likely to be spotted and the fruit russeted 

 by the fungicide. The injury to the fruit is seldom great enough to 

 be of importance when the apples are sold in barrels. If extra fancy 

 fruit is desired for sale in boxes the use of Bordeaux under New 

 Hampshire conditions seems questionable. 



