304 BULLETIN 262. 



XII. PRINCIPAL ENEMIES OF THE APPLE IN 1905, 1906 AND 1907 



An additional list of enemies of lesser importance, and not especially 

 troublesome except in unsprayed orchards, is here appended: woolly 

 aphis, tent caterpillar, red spider, leaf roller, leaf miner, plum scale 

 (Lecanium sp.), .bud moth, leaf hopper, curculio, borer, cottony scale, 

 blister mite. 



SPRAYING 



Methods of spraying. About four-fifths of the orchards are generally 

 sprayed. Nineteen per cent were seldom or never sprayed, while 6.8^ 

 which were annually sprayed in the past were not sprayed in 1905. 

 Approximately the same percentages hold with respect to acres. If one 

 were to exclude the scale-infested area, a different showing would be 

 made; for of those who do spray, more applications of some kind are 

 given since an extra one is added for scale. But on the other v hand, a 

 number of otherwise good orchards are given up to the scale. 



The records show that ten different kinds or combinations of spray 

 mixtures have been used. Experimental solutions for the scale have 

 increased this number by one-half. Several of these have been tried, 

 however, in only a few orchards. Paris green and Bordeaux mixture 

 ranks first, and second to this are prepared mixtures. Paris green 

 has seldom been used alone. 



