456 Report of the IIokticultukist of the 



TliG beetle feeds on the plinn leaves and for this reason spraying 

 the trees ^Yith Paris green or London purple has been advocated. 

 'No doubt the insects may be killed to some extent in this way but 

 the foliage of stone fruit trees is particularly liable to injury from 

 Paris green or London purple so that these poisons must be used 

 sparingly and much diluted. When the insect is abundant the 

 jaring is undoubtedly the best way of controlling the pest. 



GKEEN FEUIT-WORMS. 



The green fruit worms sometimes are so abundant on the plum 

 as to cause much damage. The treatment recommended is given 

 on page 413. 



PLANT LICE. 



Several species of plant lice attack the plum. They collect in 

 great numbers on the under sides of the leaves, causing them to 

 curl and finally drop off. The infested trees should be sprayed 

 with whale-oil soap, one pound to seven gallons of water, as soon 

 as the lice appear. The spraying should be directed from the 

 under side so as to reach all of the lice. 



QUmCE DISEASES 



CANKER OF TREE. BLACK EOT OF FRUIT. 



The canker of the tree and black rot of the fruit of the quince 

 are caused by the fungus which causes similar trouble with the 

 apple and pear. For a discussion of the disease and remedial 

 measures see page 399. 



BLIGHT. (fire BLIGHT.) 



This disease is caused by the same parasite which produces the 

 fire blight of the pear. It is discussed on page 443. 



LEAF BLIGHT AND FRUIT SPOT. 



(Eniomosporiuni maculatum Lev.) 

 Description. — Fruit spot and leaf blight of the quince are 

 caused by the same fungus that causes pear leaf blight. ^Vhen a 



