56 MAINE AGRICULTUIL\I. EXP^RIMKliT STATION. IQII. 



fortunately meteorological apparatus had not been installed at 

 this time and the observations in this regard are of necessity- 

 general. Fair weather accompanied and followed the final ap- 

 plication. 



RlJSUIvTS. 



Bffect on Foliage. No injury to foliage occurred between the 

 first and second applications. 



Observations made 2 to 15 days after the second application 

 showed leaf injury on all the sprayed plots except that treated 

 with self -boiled lime-sulphur. This injury appeared as light 

 reddish-brown spots, in many cases greater in area than bor- 

 deaux spots, and frequently seen on the marginal portions of 

 the leaf. As the season progressed these dead areas became 

 darker in color and brittle. In many cases the spots were small 

 and round, being comparable in size and shape to those found 

 on bordeaux injured foliage. The number of such areas per 

 leaf was, however, considerably less. 



The degree of injury varied but little on the several sulphur 

 plots. Plot 2 was slightly better than Plot 3 in respect to free- 

 dom from injury. In the latter division the injury appeared to 

 be confined to the smaller, less developed leaves. Plots 4 and 

 5 were both slightly superior to 2. and Plot 6 ranked equally 

 with the latter. 



Of all the lime-sulphur sprays the home-boiled preparation 

 showed the greatest amount of leaf injury, and this was more 

 apparent after the third application. (Fig. 48.) The actual 

 amount of damage was slight. A fair estimate would be 2 per 

 cent, compared with one-half to one per cent from the com- 

 mercial sprays. In all cases, however, the injury had no appar- 

 ent later efifect. Foliage and wood growth were unchecked, 

 fruit developed well and the functions of the tree seemed un- 

 impaired. Indeed, as the season progressed, close observation 

 was needed to detect any foliage injury whatever. (Fig. 57.) 

 The leaves remained notably green and vigorous and hung on 

 until long after harvest. 



The "Sulfocide" plot showed leaf scorching of the most severe 

 kind shortly after the second application. Leaves were so badly 

 burned that the afifected tissues were crisped (Fig. 49). De- 



