Insect and Disease Control 293 



by the men who handle the spray rods, yet in many cases 

 better work can bo done and a more thorough appHcation 

 made if the one handling the hose (or one of the men in 

 case two leads of hose are being used) is somewhat ele- 

 vated. If a barrel pump is carried in an ordinary farm 

 wagon, as is commonly done, the wagon may be all that 

 is necessary to raise the nozzle to a sufficient length. If a 

 power-sprayer is used, some form of low tower erected over 

 the sprayer or perhaps the top of the tank will serve the 

 purpose adequately. 



Dusting peaches to control insects and diseases 



During the past few years considerable effort has been 

 made to work out a method whereby insecticides and fun- 

 gicides may be applied in the form of dust rather than in 

 liquid. The work is still in an experimental stage, but 

 promising results have been secured by several different 

 investigators. 



The preparation that has given the most hopeful results 

 on peaches consists of superfinely ground sulfur, a very 

 finely powdered arsenate of lead, and an equally finely 

 powdered conveyor — commonly hydrated lime. In some 

 cases, however, the sulfur and arsenate of lead have been 

 used together without dilution. In the latter case a mix- 

 ture either of 90 parts sulfur and 10 parts arsenate of lead, or 

 95 of the former and 5 of the latter, has been used. Chase ^ 

 found the latter strength preferable to the stronger mix- 

 ture for peaches. He also used a " sulf ur-arsenate of lead- 

 lime" mixture made up of 45, 5, and 50 parts respectively 

 of these ingredients, and another of 60, 5, and 35 parts 



1 Ga. State Bd. of Ent. Circ. 21. 



