8 



Trees weakened by production or from winter injuries will 

 require cutting back as well as thinning out in order to secure 

 the desired vigor. 



Spraying. 



The wSan Jose scale no longer causes peach growers any worry, 

 which in some instances results in more cases of peach leaf curl 

 because of the failure of the growers to apply a dormant spray. 

 Leaf curl weakens the trees by reducing the foliage in early 

 spring and in severe cases causes the loss of the crop. It is true 

 the trees put out a second crop of leaves, but damage has been 

 done. Thorough spraying with winter strength lime-sulfur in 

 early spring before the buds start into growth will completely 

 control the disease. If applied after the leaf buds show the 

 least bit of green, how^ever, your time and material may be 

 wasted for the year, since the disease will probably have entered 

 the leaves and will develop in spite of any spray. 



Dusting peaches for the control of scab, curculio and brow^n 

 rot in summer is becoming a frequent practice in New Jersey 

 and districts south. A dust comprised of sulfur and arsenate of 

 lead powder without lime was tried out upon peaches as early 

 as 1914 in New Jersey and caused severe defoliation. Experi- 

 ments the same year in which a mixture of sulfur, arsenate of' 

 lead and air-slaked lime were used showed no burning and gave 

 good control of peach scab. A more extensive experiment in 

 1916 showed that a mixture of 65 pounds sulfur, 25 pounds 

 hydrated lime and 10 pounds dry arsenate of lead was safe to 

 use, and gave good control of peach scab. Since then mixtures 

 of 70-20-10 and 80-10-10 have been used with good results in 

 the control of scab and brown rot. During the past season I 

 have heard of serious injuries to peaches south of New Jersey 

 by applications of dust containing no lime, and of growers who 

 made an application of arsenate of lead without lime with the 

 idea of slightly burning the foliage to gain color. Any one who 

 attempts either of the above is "playing with fire." If you use 

 sulfur and dry arsenate of lead on peaches, do not fail to use at 

 least 10 per cent of lime. It is better to be safe than sorry. 



