SPRING PRACTICE IN ECONOMIC ZOOLOGY. S3 



^ PEAR INSECTS. 



MARCH-APRIL. 



Reference has already been made in the Winter Manual to the 

 Pear Pyslla, Pyslla fyricola, and Pear Leaf Blister Mite, Eriofhyes 

 pyri. If the lime-sulfur wash or kerosene emulsion was not used for 

 these during the winter period, by all means make the application 

 while the buds are swelling and before .uey have opened, if these 

 pests were present during- the preceding summer. 



The following pests attacking apple, also feed upon the pear. 

 Reference should be made to the apple section for treatment: 



San Jose Scale, Asfidiotus ferniciosus. See page 39. 

 Scurfy Scale, Chionasfis furfurus. See page 51. 

 Oyster Shell Scale, Le-pidosaphes ulmt. See page 51. 

 Spring Canker Worm, Paleacrita vernata. See pages 39, 40. 

 Eye Spotted Bud Moth, Tmetocera ocellana. See page 39. 

 Pistol Case Bearer, Coleophora malivorella. See page 40. 

 Cigar Case Bearer, Coleophora fletcherella. See page 40. 

 Aphids. See page 41. 



Leap Crumpler, Mineola indigenella. See page 42. 

 Climbing Cutworms. See page 43. 



Oblique Banded Leaf Roller, Archips rosaceana. See page 43. 

 Lesser Apple Leaf Folder, Acleris miniita. See page 43. 



MAY. 



Apple Tent Caterpillar, Malacosoma aniericana. See page 46. 

 Codling Moth, Carpocapsa pomonella. See page 47. 

 Plum Curculio, Conotrachelus nenufhar. See page 50. 



The eggs of the Peak Psylla hatch in May and the young are, at 

 this time, about one-sixteenth of an inch long, yellow in color, after- 

 wards becoming marked with black and red. They are sucking in- 

 sects and the drain they make upon the vitality of the tree by drawing 

 ' uices from the leaves is shown early in the season by a drooping of 

 the young growth and considerable dropping both of fruit and 

 foliage. The leaves become covered with a coating of honey dew in 

 which a black sooty mold will flourish later in the season. Flies, 

 wasps and ants swarm about the tree, attracted by the honey dew, 

 and thus give notice of the unhealthful condition that exists. The 

 young insects can be found with sharp eyes or with a magnifying 

 glass, resting in and about the axils of the leaves, immersed in honey 

 dew. While the insects are immature and cannot fly, they may be 



