32 STATE HORTICULTURAL SOCIETY. 



definite quantity each spring aVjout the roots of the same trees in order 

 to ascertain its full value. 



In planting an apple . orchard in newly cleared timber land, it i» 

 advisable to cultivate the land in some other crop, such as corn for 

 two years before the apple trees are set out. This will kill the wooly- 

 aphis that may be on the roots of the wild crab and allied trees, which 

 would otherwise infest in great numbers and seriously injure the young 

 apple trees. 



In all cases it is advisable to thoroughly drench the roots of apple 

 stock in strong kerosene emulsion by placing them in the mixture for 

 a minute in order to kill what aphis may be there. This should be done 

 by the nurseryman when the trees are first dug, or by the orchardist just 

 before planting them. While planting, each young apple tree should 

 have a liberal supply of tobacco dust placed about and over the roots 

 and close up to the body, and a little earth covered over this tobacco. 

 Then every spring, just as soon as settled warm weather appears, each 

 tree should receive a quantity of tobacco dust applied in the manner 

 previously stated. The amount should be about one pound the first 

 spring, and should be increased each spring until the tree receives 

 about three pounds when six years old, after which the amount need 

 not be increased unless found to be necessary. If the above direc- 

 tions be followed, I do not think the wooly-aphis will damage an appl© 

 orchard. 



The experiments above described seem to me to prove that the 

 wooly-aphis infesting the roots of apple trees is as cheaply and as 

 easily controlled as most other injurious insects. 



Tobacco dust can be obtained from the Hill-Settle Tobacco Co., 

 of St. Louis, Mo., or from the A. B. Mayer Manufacturing Co., of St. 

 Louis, Mo. Carbon bisulphide can be obtained from the manufacturer, 

 Mr. E. R. Taylor, Cleveland, Ohio, for ten cents per pound, in fifty 

 pound cans. 



The Station is indebted to the Kansas City, Fort Scott & Memphis 

 Railroad Company for numerous courtesies and material assistance in 

 conducting these experiments. 



J. M. Stedman, Entomologist, Columbia, Mo. 



Music — Piano duet — Mr. Von Troemel and Mrs. Burden. 



