FRUIT CULTURE. 



229 



Diseases and Insects. — Chief among^ the 

 diseases in point of destructiveness comes 

 the " yellows." The orig-in and exact na- 

 ture of this disease are unknown. It is 

 highly contagious, and will ordinarily de- 

 stroy a tree in three years. Though an On- 



and wirj' growths shown in the three central 

 twigs in Fig. 2>Z ^'^ enable the grower to 

 diagnose the case. Each outside twig in 

 this figure is a normal twig. 



Leaf-curl is a highly injurious fungous 

 disease affecting the peach. Fig. 34 shows 



FIG. 33 



COll.Af/M/SA/^ 



tario statute provides for its destruction the 

 law is often a dead letter owing to the apathy 

 of the local authorities. The wise man will 

 take out at once and burn any tree showings 

 symptoms of this disease. The prematurej 

 ripening and spotted appearance of the fruit 

 is a sure sign, and the sickly yellow foliage 



the typical appearance of a diseased twig. 

 Three remedies exist for this trouble. Spray- 

 ing with Bordeaux mixture, once before the 

 blossoms open and once after will do mtich 

 to control it. Whale oil soap, one pound 

 to the gallon, haS been thoroughly effective 

 in Ohio, applie,d immediately before the 



