Specific Pests 155 



poplar, and willow — damaging and even killing the younger 

 trees and young branches. 



Pruning the infested branches seems the only remedy. 



Clicking Beetles, similar in shape, but smaller than the 

 former and of dull colors, are most readily recognized 

 by their capacity of snapping and jumping when laid 

 on their backs, thereby regaining their legs. Their grubs 

 are the long, slender wire-worms, living for three years 

 undergroimd; they are especially injurious to grass crops and 

 lawns, cutting off the grass just below the crown, the grass 

 browning and dying in constantly enlarging patches. They 

 also injure trees by feeding on their roots, while the beetles 

 gnaw the young roots of deciduous trees and conifers. 



Ditching around the affected patches of lawn and collect- 

 ing the worms as they come out into the ditch, or poisoning 

 them with Paris Green is applicable to the grass pests; hot 

 water applications at the root, collecting the beetles or 

 baiting them with poisoned wads of clover, potato, or corn- 

 meal at night are methods applicable to the tree pests. 



Cockchafers are large beetles, of which the well-known 

 June bug is a type; they cause injury to leaves in the beetle 

 stage and to roots in the grub stage; the latter, Hving for 

 se\'eral years underground, are capable of ruining young 

 plantations. 



They are easily collected as beetles, by jarring the branches 

 late in the evening, or better, in the cool of early morning, 

 when they do not fly readily. When underground, the 

 application of kerosene emulsion ten times diluted, or of a 

 tobacco decoction, or else digging them out may be resorted 

 to. 



Leaf Beetles are small or medium-sized, often of bright and 

 metallic color, of semi-spherical or cylindrical form and 

 compact body. Both beetles and larvae, which latter are 



