Impostant Ohoha&d Pjssts ., S bai Eokmui 183 



Cure of lime-sulphur alter calyces are Bhed and repeat once or 

 twice a: three week intervals. 



Black Pot. — Grape? may be protected in - - - when this 

 fungus is destructive by sprayings with bordeaux made as leaves 

 unfoid and repeated three or more times through the g ng 

 period, if possible before rains, Bordeaux mixtr. i s :ns never 

 injure grape foliage and it is often made more concentrated 

 than mentioned in the formula given on page 4 s 7. 



■■:'■: Kn ■'. — This fungus grows on the European plum and 

 on eertaiu cherries. Sp res - a ter both in v. and spring. 



The most effective remedy is the preventive one of cutting all 

 knots and burning them as soon as possible after their appear- 

 ance. Bordeaux mixture affords considerable pn a if used 

 in the summer. 



/. a/ Curl of Peach. — This fungus causes the young leaves of 

 peach - thicken and become more or less pink in the spring. 

 A whitish bloom is- noted as the attack continues and practically 

 all of the diseased foliage drops. Some vari< - .ire quite 

 resistant and in warm seasons the damage is not as great 

 as in eool weather. Lime-sulphur or bordeaux, as buds begin 

 to swell or earlier, is effective. In - tested orehards. the 



lime-sulphur treatment for seale will also control leaf curl. 

 Treatment after leaves are out is ineffectual. (See Cornell I ni- 

 Agricultural Experiment Station Bulletin 276.) 



Fire Blight of Pears. — In summer blackened shoots bear g 

 dead leaves and shriveling fruits often a notice. This dis- 



ease is bacterial in its nature and during the summer may ho 

 spread by pruning tools unless disinfected, and is also undoubt- 

 edly spread by leaf and bark puncturing insects. Xo spraying 

 is effective. Cutting blighted limbs and the blighted spots on 

 the trunks offers the only protection and this work should be 

 taken up at the rirst appearance of blight. Corrosive sublimate. 

 1-1000, is tised to disinfect cuts on limbs ami tools. (See 



rnell University Agricultural Experiment Station Bulletin 

 872.) 



SPRAY FOBMU1 



U. rws 

 Arsenate of lead, paris green and London purple have been 

 the leading forms of arsenic used to poison insects which eon- 



