1698 



ENCYCLOPEDIA OF PRACTICAL HORTICULTURE 



Mi'ul) I'liiin Louse 



Hyatopterus arundinis Fab. 

 General Avpearniice 

 Tlio adult liii' aro long and slender, 

 light green with three darker longitudi- 

 nal stripes on the back, and covered with 

 a white powder from whence it gets its 

 name. It usually occurs in large colonies 

 on the under side of plum and prune 

 leaves, causing them to turn yellow and 

 drop but not to curl. 



Life History 



The first broods hatch in the spring 

 from the black, shining eggs deposited 

 upon the twigs of the trees the previous 

 fall by the sexual females. These lice 

 settle upon the under side of the first 

 leaves and bring forth young which soon 

 mature and produce others. During the 

 summer, in July and August, the lice, 

 most of which have acquired wings by 

 this time, leave the trees and feed upon 

 grasses, the fall migrants returning to the 

 trees to give birth to the true sexual 

 winged males and wingless females, which 

 mate — the females laying the over-win- 

 tering eggs. 



Food Plants 



The only fruit trees attacked appear to 

 be the prune, apricot and plum. 



E. O. Essio 



Mottled Plum-Tree Moth 



Apafela superans 

 The caterpillars of the mottled plum- 

 tree moth reach maturity about the 

 middle of September, enter the chrysalis 

 stage, and thus pass the winter. This is 

 a green caterpillar, about an inch long, 

 and is somewhat flattened vertically as if 

 the sides had been compressed. There is 

 a chestnut-colored stripe along the back, 

 margined with yellowish, and on all the 

 segments are shining tubercles, each giv- 

 ing rise to one or more blackish hairs. A 

 few whitish hairs are found on the sides 

 of the body. Remedy same as for the 

 gray dagger moth. 



H. A. floSSARD, 

 Wooster, Ohio. 



OvsTER-SnEix Scale. See Apple Pests. 



Plant Ltce. See Aphids. 



Oyster-Shell Scale. 



The Plum Gall Mite 



Eriophyes phloeocaptes 

 Hibernates during the winter in small 

 sub-spherical galls at the base of the buds. 

 A cluster of galls may completely sur- 

 round the twig. In early spring the mites 

 leave the galls to form new ones. The 

 newer galls are plump and smooth, but 

 the older ones become dry and wrinkled. 

 Prune out the infested twigs before the 

 buds swell and burn them. Spraying 

 thoroughly with lime-sulphur about the 

 time the buds are swelling will doubtless 

 prove a valuable measure against these 

 mites. 



H. O. Go.SSARD, 

 Wooster. Ohio. 

 Plum Gonger 



Coccotorus prunicida 



During late August and in early Sep- 

 tember, plums are sometimes found 

 falling as if stung by curculio, but in- 

 vestigation discloses that the pit has been 

 eaten out and that no crescent-shaped cut 

 is shown on the skin of the fruit. Soon 

 after the fruit falls, a small, mottled, 

 brown-snout beetle eats its way out 



