390 AGRICULTURE OF MAINE. 



"4. Very badly injured. — Baldwin, Collamer, Jonathan, 

 Mann, Red Transparent,* Repka,* Rhode Island Greening, 

 Romna,* Saint Peter,* Twenty Ounce, Vineiise Rouge,* Win- 

 ter Banana, Wagener, Yellow Calville.*" 



Much of the injury from bordeaux mixture may be avoided 

 if proper attention is given certain factors which have more or 

 less to do with its occurrence. Too strong bordeaux should not 

 be applied — a 3-3-50 mixture is recommended. The lime should 

 be of good quality and approximately equal parts of lime and 

 copper sulphate should be used. Never pour concentrated solu- 

 tions together — equal and full dilution of the milk of lime and 

 copper solutions should be made before mixing. Cover the 

 fruit and foliage with a fine mist, but do not apply sufficient 

 mixture to cause the trees to drip. Do not spray during rainy, 

 foggy or damp w-eather. Study susceptibility of varieties. 

 Those varieties which are listed above as badly or very badly 

 injured by bordeaux mixture, and any others which the orchard- 

 ist's experience indicates should be placed in this class, should 

 not be sprayed with bordeaux mixture after the leaves begin 

 to unfold. Past experience has shown that under ]\Iaine con- 

 ditions with those varieties like the Ben Davis which are quite 

 susceptible to spray injury, the ill effects resulting from the 

 application of bordeaux mixture, except early in the season, 

 have equalled or exceeded the good. There is considerable rea- 

 son to believe that some form of the lime-sulphur sprays in 

 proper dilution may be of service on such varieties. Bulletin 135 

 of the Illinois Station by Prof. Chas. S. Crandall, and Bulletin 

 287 of the New York (Geneva) Station by Prof. U. P. Hed- 

 rick, treat of bordeaux mixture and bordeaux injury in relation 

 to the apple in a very comprehensive and exhaustive manner, 

 and these publications are recommended to any who wish fur- 

 ther information on this subject. 



Leaf spot. Spotting of the leaves is closely associated w'ith 

 the russeting of the fruit by spray. However, a study of this 

 trouble extending over several years and representing material 

 collected in many dift'erent parts of the State shows that leaf- 

 spot in Maine is by no means confined to that caused by the 

 use of sprays. In 1908 leaf-spot was exceedingly abundant on 



*Russian varieties. 



