INJURIOUS INSItCrs OF* 1903. 



149 



his fancied enemy. The growth of young apple trees from two to 

 four years old suffered serious check from this minute insect. 

 As seen in the accompanying illustrations, one could readily teU 

 at a glance when during the summer the insect was doing its 

 worst work from the fact that the branches took a fresh start 

 after the period of injury, as evinced by the uninjured leaves. 



This insect, which is the same as the Einpoa albopicta of 

 Forbes, and TeUigonia mali of Le Baron, probably lays its eggs 

 in slits in stems of plants near the ground. It has but few natural 

 enemies and is very difficult to combat successfully. Mr. Mold 

 of Adrian thinks he met with some success by using the dust 

 sprayer, but the writer met with the most conclusive evidence in 



Fig. 91. — Nursery row injured by this leaf hopper. Original. 



a conversation with Professor Stedman, Entomologist of Mis- 

 souri, who has devised a spraying machine, evidently destined to 

 be of great use in nurseries large enough to warrant the expense 

 entailed in its manufacture. It consists of a spray pump and 

 tank mounted on a high cart, the wheels being sufficiently high 

 and at the right distance apart to "straddle" two rows of trees. 

 "The wheels are as high as my head," said Professor Stedman. 

 The pipes and nozzles from the pump are so arranged that the 

 spray comes from below, striking the leaves underneath, as well 

 as from above, and enveloping four rows, the two between the 

 wheels and the one on each side, with such a fog that the tree 

 hoppers, whether on the leaves or in flight, perished in large 

 numbers. Kerosene emulsion was used, and gave, according 



