26 



N. H. AGRICULTURAL EXPERIMENT STATION [Bulletin 199^ 



WHAT THREE IMPORTANT PESTS MEAN 



The codling moth and apple maggot (or railroad worm) are the 

 two most serious pests attacking apples in the state, being respon- 

 sible for most of the wormj^ fruit. Their control has been essen- 

 tial to the development of the apple industry. In like manner 

 the root maggot, which infests onions, cabbage, cauliflower, tur- 

 nip, radish, etc., has damaged root crops to the extent of 25 per 

 cent of the annual crop. 



A thorough investigation of these three pests at the Station — 

 each conducted over a period of several years — has demonstrated 



Not sprayed. 



In order to obtain control of late blight of potatoes, proper spraying 

 machinery must be used. 



2 nozzles to row 

 60-90 lbs. pressure. 



3 nozzles to row 

 90 lbs. pressure. 



3 nozzles to row 

 ISO lbs. pressure 



Rotten tubers harvested (relative numbers) . 



