INSECTS AND DISEASES OK THE PEACH lllo 



it is decreased to the size of a prime and ripens about two weeks 

 late. In the third and fourth years the disease causes a decrease 

 in foliage with more and more indefinite characters. The fruits 

 of the third year are about the size of walnuts and seldom ripen. 

 In the fourth year they are very small and never ripen. Death 

 of the limb or the tree usually follows in the fourth year of the 

 disease. 



In the Crawford type during the first year the disease pro- 

 duces somewhat different characters. The terminal foliage is 

 normal in color and shape, but the leaves below the tip are tinted 

 with the same characteristic yellow common in both diseases. 

 The tinted leaves seem to possess a drooping tendency, due to 

 the tip third of each leaf turning back. This curving of the tip 

 ( iiives a clumping effect with the seeming droop. Only slight 

 decrease is noted in the size of the fruit. 



In the second year foliage characters in the Crawford type do 

 not differ greatly from those of the first year. The fruit develops 

 to about the size of a prune and ripens about two weeks late. Tn 

 the third year the foliage 4 is usually strikingly clinching in nature. 

 The fruit is small and never ripens. 



In the fourth year the tree brings forth very little foliage and 

 the fruits are small. At the end of the season the result is invar- 

 iably death. 



Frost injury to the roots and crown may cause trees to throw 7 

 out weak foliage which may easily.be confused with the little-peach 

 disease. If the grower will keep in mind the principal foliage 

 characters, however, no mistake should be made. The entire 

 foliage of a frozen tree is affected, which is not true usually in 

 the case of little peach, as the terminal leaves are a healthy green 

 in the first two years of the attack. In plates 6 and 7 

 the effects of the disease on the two types of foliage may be seen, 

 and in Plate 8 the yearly effect on the fruit is indicated. 



Control. The method of control is identical with that of yel- 

 lows. 



Frost Injury 



Frost injury is described here because it is often confused with 

 diseases of the peach. Two types of Injury are considered, first, 

 that which affects the crown and roots and, secondly, that which 

 appears at the crotching of the trunk. 



