312 



STATE BOARD OF AGRICULTURE. 



Late in the season they often become numerous before laying the eggs for the 

 spring brood. 



REMEDIES. 



Kerosene-emulsion or any of the contact insecticides, applied in the ordinary 

 way, except that it should be a little stronger than when used for green lice. 

 It must be borne in mind that each louse must be hit in order to be killed. 



The Cherry Leaf -beetle. (Galerucella cavicolUs.) 



A small, dark-red beetle less than one-fourth of an inch in length, oval in 

 form, and with the antennae and parts of the legs black. This small beetle feeds 

 on cherry. The writer has seen them in great numbers on pin cherry (a wild 

 cherry) at AuTrain Falls in late August. The beetles have welcomed with 

 enthusiasm the introduction of the cultivated cherry in their haunts, readily 

 accommodating their taste to the new food. They feed on the leaves, and often 

 come in large numbers, appearing in June and again in September. In the 

 Northern Peninsula they do a great deal of damage to young trees, coming out 

 of the ground from a depth of several inches, and attacking the young foliage 

 about the first of June. The larvae also works on the foliage, following the 

 adults. 



EEMEDIES. 



When on old trees not in bloom, these beetles may be killed with paris-green 

 and lime, one pound of the poison to one hundred and seventy-five gallons of 

 water, but on very young trees the case is more difficult. Mr. Geismar, the 

 superintendent of the Upper Peninsula Experiment Station, points out the fact 

 that the beetles either hibernate or pupate under the surface of the soil, often 



Fig. 31.— Pear Slug:, from Saunders, Insects In- 

 jurious to Fruits. 



Fig. 30. — Cherry Leaf-beetle. Author's illustration. 



at a depth of several inches, and usually within a few inches of the base of the 

 tree. He finds also that they are almost sure to climb the tree instead of flying, 

 being somewhat sluggish on first coming to the surface. This suggests the use 

 of narrow bands of sticky fly-paper or loose cotton at such times in the case 

 of young trees. The beetles eat very voraciously and a few dozen can work 

 havoc in a young tree, especially if it is in bloom and one does not wish to spray. 



Bud Moth (see Insects affecting the apple). 



Cherry Slug or Pear Slug (see Insects affecting the pear). 



Apple-tree Tent-caterpillar (see Insects affecting the apple). 



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



Canker-worm (see Insects affecting the apple). 



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



