1760 



ENCYCLOPEDIA OF PRACTICAL HORTICULTURE 



Pyrus japonica, is grown in gardens for 

 the sake of its flowers, which vary in 

 color from creamy white to rich red, and 

 are produced during the winter and early 

 spring months. The fruit is green and 

 fragrant but quite unedible. Cydonia mau- 

 le% a more recently introduced shrub from 

 Japan, bears a profusion of equally beau- 

 tiful orange-red flowers, which are fol- 

 lowed by fruit of a yellow color and 

 agreeable fragrance; so that, when 

 cooked with sugar, it forms an agreeable 

 conserve, as in the case of the ordinary 

 quince. 



QUmCE DISEASES 



The quince is attacked by the diseases 

 and pests common to apple and pear; and, 

 for the most part, they will be found 

 listed under those heads. 



Antliracnose 



H. S. Jackson 

 Mr. C. C. Cate, formerly assistant in 

 plant pathology at the Oregon Agricul- 

 tural College, records the presence of 

 apple tree anthracnose as a disease of the 

 quince. The writer has also observed this 

 disease upon several occasions in the 

 vicinity of Corvallis, first in the fall of 

 1909. We are informed by W. H. Law- 

 rence that he found the disease quite com- 

 mon in the Hood River valley in the fall 

 of 1911. It is apparently not infrequently 

 found on the fruit, particularly in sea- 

 sons of early fall rains. It also causes 

 small cankers on the branches and twigs. 

 No experiments looking toward the con- 

 trol of this disease on the quince have 

 been carried out, but it is probable that 

 fall spraying with Bordeaux mixture, as 

 for the apple, would control the trouble. 

 Apple trees in the vicinity of quinces 

 should be protected by fall spraying in 

 order to prevent the disease from spread- 

 ing to the quinces. 



Fire Blight 



The disease known as fire blight (See 

 Blight, under Pear Diseases), is also 

 known to attack the quince. In districts 

 where fire blight is prevalent, quinces 

 should be inspected as carefully as apples 



and pears, and the treatment recom- 

 mended for the control of the disease on 

 those crops should be followed out. 



Black Knot, or Crown Gall. See 

 Crown Gall, under Apple Diseases. 



Leaf Blight 



EntomosporiuTYi maculatum 

 H. S. Jackson 



In rainy seasons the leaf blight of the 

 quince, due to Entomosporium macula- 

 tum., which causes spots on the foliage 

 and fruit, is occasionally found in Oregon, 

 though it is seldom serious. This disease 

 may be controlled by spraying with Bor- 

 deaux mixture, first as soon as the petals 

 fall, followed by two applications at in- 

 tervals of two weeks. 



Little Leaf. See Peach Diseases. 



QUmCE PESTS 



Greedy Scale. See Apple Pests. 



Green Apple Aphids. See Apple Pests, 

 also Aphids. 



Oyster Shell Scale. See Apple Pests. 



Pear Slug. See Pear Pests. 



San Jose Scale 



Fig. 1. San .Jose Scale on Quince Leaves. 

 For control see under Apple Pests. 



— Purdue Experiment Station. 

 Scurfy Scale. See Apple Pests. 



