228 N. H. AGR. EXPERIMENT STATION. [Bulletin 139 



type is possibly more used for orchard work and the Bordeaux 

 for garden and row spraying. "Where orchard trees are to be 

 sprayed a double or triple nozzle is usually used, thus increasing 

 the volume of spray and covering the tree more quickly. 



In all foliage spraying the finest spray should be used, as it 

 covers the foliage most evenly with the least amount of material. 

 A fine spray will not carry over four or five feet at ordinary 

 pressures, unless aided by the wind, and those nozzles adver- 

 tised to spray ten feet or more are undesirable. In spraying, 

 hold the nozzle away from the tree so that the spray may settle 

 over it like a fog, except where adverse wind makes this impos- 

 sible, and stop spraying when the foliage is wet and before it 

 drips much. A bamboo extension rod with cut-off cock at the 

 base enables one to reach the tops of large trees and to work much 

 faster. Other points regarding spraying will be found in bulle- 

 tin 131 of this station. 



Summary : — The fall web-worms, yellow-necked apple 

 caterpillars, red-humped apple caterpillars, tussock moth cat- 

 erpillars and hickory tiger moth caterpillars injure apple foli- 

 age in late summer. They may be controlled by spraying 

 with an arsenical insecticide about August first. As it is 

 also desirable to spray for the brown-tail moth at this time, 

 an early August spraying may well be made a regular orchard 

 practice, for which directions are given. 



