76 



CIRCULAR 270, U.S. DEPARTMENT OF AGRICULTURE 



Page 



Sawfly, dock 43 



Scale- 

 brown apricot 49 



cottony maple 12 



ovster-shell 11 



San Jose 8, 44, 49, 62 



Shot-hole borer 49, 53 



Shot-hole borer, larger 32 



Slug, pear 41,47 



Snowy tree cricket 56 



Spraying schedules 70 



Spray materials 66 



Spreaders and stickers 70 



Stone flies 63 



Syneta leaf beetle 37,47,58 



Syrphus flies 64 



Tarnished plant bug 27 



Tent caterpillar, western 38,59 



Thistle aphid 50 



Thrips— 



flower 34 



pear 35,49,53 



Tree— Page 



banding materials 72 



cricket, snowy 56 



hoppers 25 



Tussock moths 40,59 



Twig borer, peach 59,61 



Two-spotted mite 16,45 



Walnut aphid 63 



Webworm, fall 39,59 



Weevil, bronze apple tree 34 



Western- 

 peach borer 52 



tent caterpillar 38,59 



tussock moth 40 



Woolly apple aphid 23 



Worm- 

 destructive prune 56 



fall web 39,59 



green fruit 31 



pear leaf 42 



