THE PEAR. 



Pear scab is the most seriou-s disease 3'^et affecting this fruit in the 

 Coast region. It requires the same treatment as apple scab. 



Blight, or "fire" blight, of the pear is yet unknown in western 

 Washington, but it is reported from western Oregon. In view of the 

 enormous damage this disease has caused in the inland regions, it is 

 very desirable to prevent its spread as much as possible. 



The pear-leaf blister -mite is of frequent occurrence. 



THE CHERRY. 



Brown rot, or fruit mold, is the onh^ disease of serious consequence. 

 The control of this disease is difficult, but two sprayings of Bordeaux 

 mixture seem decidedly helpful. One of these should be just before 

 the flowers open, the other immediately after the petals fall. It is 

 decidedly helpful to prune the trees so that the tops are open and the 

 fruit exposed as much as may be to the sunshine. 



Of insects, the black aphis is periodically abundant. It can easily 

 be destroyed with kerosene emulsion. 



Gummosis, a disease of very obscure origin, is a frequent trouble 

 with sweet cherries. Nothing satisfactory can be recommended in the 

 way of treatment. The common practice of slitting the bark is, at 

 best, of doubtful value. Trees grafted on wild stock are somewhat 

 less subject to the disease. 



THE PLUM AND THE PRUNE. 



Like the cherry, both of these fruits are subject to the brown rot. 

 While the disease varies greatly in severity from year to j^ear, the 

 gathering and burning of the mummified fruits should never be neg- 

 lected. The thinning of the fruit so as to prevent clusters is also 

 desirable. Spraying for this disease has given contradictory results, 

 and much experimenting is yet necessary to determine whether it is 

 profitable or not. 



The peach-tree borer is prevalent in some sections, attacking par- 

 ticularl}^ prune trees grafted on peach roots. Digging out the larvae 

 in fall and spring with a knife is the usual method of control. In 

 addition some growers mound up earth about the bases of the trees in 

 May, a practice which would seem to be always desirable, and perhaps 

 as good as any that can at present be recommended. 



In the last few years the root disease caused by the mushroom, 

 Armillaria tnellea, has been prevalent in Clark County, Washington. 

 Apparentl}^ it has been introduced, as it has not been found in adjacent 

 woodlands. Besides the mushrooms which appear about the bases of 

 the affected trees in the fall, the disease may be known by the black, 

 string-like strands (rhizomorphs) which occur on the crown and roots. 



