EXPERIMENT STATION BULLETINS. 



337 



effective but should not be used on the first brood because of the danger of 

 poisoning the fruit. Even road-dust has been used effectively, although almost 

 anything else is more effective. 



AFFECTING THE FOLIAGE. 



White-marked Tussock-moth (see Insects affecting the apple). 

 Fall Web-worm (see Insects affecting the apple). 

 Bud-moth (see Insects affecting the apple). 

 Aphids (use same remedies as for apple aphids). 



» 



AFFECTING THE FRUIT. 



Bumble Flower-beetle (see Insects affecting the peach). 

 Codling-moth (see Insects affecting the apple). 

 Plum Curculio (see Insects affecting the plum). 



INSECTS AFFECTING THE PLUM. 



AFFECTING THE ROOTS. 



Peach-tree Borer (see Insects affecting the peach). 



AFFECTING THE TRUNK. 



Flat-headed Apple-tree Borer (see Insects affecting the apple). 



AFFECTING THE BAKK. 



The European Fruit-scale. (Aspidiotus ostreaeformis.) 



Next to the San Jose scale in point of importance, comes the European fruit- 

 scale, and while -no such far-reaching destruction can be charged against it as 

 against the San Jose scale, it is a serious pest worthy of careful consideration. 

 There are points of difference between this scale, the eccentric scale, and the 



Fig. 61. — European Fruit Scale, enlarged. Author's illustration. . 



English walnut scale, but they are so slight that it seems hardly worth while to 

 try to distinguish them in a work of this sort. There are indeed points of differ- 

 ence between the insects beneath the scales but they require a microscope for 

 elucidation. The eccentric scale does, however, possess one character that will 

 often render it possible to make a good guess as to its identity without the aid 



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