341 



When the adults appear jar them from the tree onto sheets or curcuHo-catchers 

 and destroy them. To determine when they appear jar a few trees daily, begin- 

 ning the latter part of May. Cornell Bulletin 148. 

 San Jose scale. See under APPLE. 

 Round-headed apple-tree borer. See under apple. 



PEACH AND APRICOT. 



Peach borer. 



The adult is a clear-wing 

 moth. The larva burrows 

 just under, the bark near 

 or beneath the surface of 

 the ground; its presence is indicated by a 

 gummy mass at the base of the tree (Fig. 

 1S3). Dig out the borers in June"",; and 

 mound up the trees. At the same ;jtime, 

 apply gas-tar or coal-tar to the trunk from 

 the roots up to a foot or more above the sur- 

 face of the ground. Cornell Bulletins 176 

 and 192. 



Plum Curculio. See under plum. 

 San Jose Scale. See under APPLE. 



Pear psylla. 



the leaves and 

 They develop 



Peach borer. 



PEAR. 



These minute, yellowish, 

 flat-bodied, sucking in- 

 sects are often found 

 working in the axils of 

 fruit early in the season, 

 into minute, cicada-like 

 jumping-lice. The young psyllas secrete a 



large quantity of honey-dew in which a peculiar black fungus grows, giving the 

 bark a characteristic sooty appearance. There may be four broods annually and 

 the trees are often seriously injured. After the blossoms fall, spray with kerosene 

 emulsion, diluted with 6 parts of water, or whale-oil soap, i lb. in 4 or 5 gals, of 

 water. Repeat the appHca- 

 tion at intervals of from 3 

 to 7 days until the insects are 

 under control. Cornell Bulle- 

 tin 108. 



See under 

 Leaf blister- apple. On 

 mite. pears, the 



lime-sul- 

 phur wash has also been 

 found effective. 



San Jose scale. 

 Codling-moth. 



See under 

 apple. 

 See under 



APPLE. 



Fig. 154. Pear slugs skeletonizing the leaf . 



