The Rose Chafer 241 



The larva reaches its full size toward the latter part of April, 

 bores into the middle of the cane, where it will be more secure from 

 insect foes, forms a smooth, oval cell, and transforms into a white 

 pupa, showing quite plainly the marks of the future beetle. It 

 gradually darkens, and assumes more and more the form of the 

 perfect insect. 



Control. As the perfect insect does not emerge from the cane till 

 late in spring, it is only necessary to attend to the spring pruning 

 promptly, taking care to watch for and remove all galls. All wood 

 cut away should be carefully collected and burned, for removing it 

 from the root in no way hinders the development of the beetles. 

 Although black raspberries are attacked, no galls are formed and 

 little or no injury is done, the insect apparently confining its work to 

 the center of the cane. This may make its destruction more difficult, 

 since its presence cannot be easily detected. Wild bushes growing 

 in the vicinity are also a menace by serving as breeding-grounds. 

 The insect is reported more destructive in the southern than in the 

 northern states. 

 References. 



N. J. Expt. Sta. Spec. Bull. N. 



W. Va. Expt. Sta. Bull. 15. 



Ohio Expt. Sta. Bull. 45. 



THE ROSE CHAFER (PIG. 30) 



Macrodactylus subspinosus, Fabr. 



In sandy regions, where it is prevalent, this is one of the most 

 dreaded enemies of the horticulturist. It appears in such vast 

 hordes oftentimes, and is so difficult to poison, that it is very hard 

 to combat. In July the female beetle lays about thirty whitish, 

 nearly globular eggs about one-thirtieth of an inch in diameter, 

 which are placed three to six inches beneath the surface of the ground. 

 The eggs hatch in about twenty days, and the young larvae feed 

 on the roots of grasses and other plants until the approach of cold 

 weather, when they work their way deeper into the ground, passing 

 the winter in a torpid state. In spring they approach the surface 

 and form an oval cell of earth in which to pupate, and from which 



