New York Agricultural Experiment Station. 351 



drop the diseased parts of the leaf in this way more readily than 

 cherries or plums, and so the foliage of trees that have been attacked 

 quite severely appears as if riddled with holes. Where the disease 

 is prevalent it is suggested that tlie treatment set forth under 

 " Cherry Leaf Blight " be given. 



CuKcuLio. — This insect causes great damage in apricot orchards 

 by attacking the fruit, causing wormy fruit. Frequently a large 

 part of the crop becomes infested and drops unless measures are 

 taken to kill the beetles before they deposit their eggs in the young 

 fruit. This is best done by jarring as recommended in the discus- 

 sion of this insect under the heading of " Plum Curculio." 



The other insects mentioned as attacking the peach are also liable 

 to trouble the apricot. 



Blaclcberries. 



ANTHRACNOSE. — Same as Raspberry Anthracnose described on a 

 subsequent page. 



Blight. — Same as Blight of Raspberries described on a subse- 

 quent page. 



Rust. — Same as Rust of Raspberries described on a subsequent 

 page. 



Cheri'y. 



Black Knot. — The black knot of cherry is said by good authority 

 to be caused by the same fungus that causes plum black knot, the 

 treatment of which is discussed on a subsequent page under "Plum 

 Black Knot." 



Fruit Rot. — The rotting of the ripening fruit of cherries, plums, 

 peaches and other fruits, frequently causes serious loss to the fruit 

 grower. A fungus of the genus Monilia attacks the fruit and 

 causes it to rot. The rotted fruit afterwards becomes covered with 

 a gray powdery mould and frequently hangs to the tree till the next 

 summer in a dried or mummy form. The gray powder consists 

 of the germs of the disease which may be washed by rains, blown 

 by winds or carried by insects to other parts of the tree, thus 

 spreading the disease. The mummy fruits carry the disease 

 over from one season to the next, and therefore the collecting 

 and burning of these fruits appears to be a good sanitary n)easure. 

 The fungus begins its attacks early in the spring, often destroying 

 many of the blossoms. These decaying blossoms are blown about 

 by the wind, thus spreading the infection. It also attacks the leaves 



