EXPERIMENT STATION BULLETINS. 



313 



INSECTS AFFECTING THE BABK. 



Fruit Bark-beetle (see Insects affecting the .peach). 

 San Jose Scale (see Insects affecting the peach). 

 European Fruit-scale (see Insects affecting the plum). 

 Eccentric Scale (see Insects affecting the apple). 

 English-walnut Scale (see Insects affecting the peach). 



INSECTS AFFECTING THE FRUIT. 



The Cherry Fruit Fly. (Rhagoletis cingulata.) 



Without doubt the great majority of the "worms" of "wormy cherries" in our 

 state, are the grubs of the plum curculio. There is, however, another insect 

 whose larva develops in the cherry. This second cherry worm was carefully 

 studied by Professor M. V. Slin.gerland, and his account published in Bui. No. 

 172 of the Cornell University Experiment Station. The fly is described as being 

 about three-sixteenth of an inch long, somewhat resembling a house-fly, except 

 as to size and the fact that the wings are marked with four transverse bands 

 of a blackish color. The larva is more slender than the grub of the curculio, 

 resembling more closely the larva of the apple maggot. In the case of the 

 curculio, one finds infested cherries bearing the characteristic crescent-shapqd 

 scar, cut in when the egg was laid. In the case of the cherry fruit-fly there may 

 be no indication of the presence of the maggot from the outside up to the time 

 when the maggot is full grown, at which time, the part of thfi fruit most tun- 



Fig. 32. — Cherry Fruit-fly, after Slingerland. 



neled under, sinks in or rots, thus indicating the presence of the pest. The 

 pupal stage is passed in the soil. In the spring the adult fly emerges and prob- 

 ably lays her eggs beneath the skin of the young fruit where no spray will 

 reach it. 



EEMEDIES. 



No practical remedies seem to have been as yet discovered other than picking 

 the fruit as soon as it shows the presence of the insect and deep cultivatiou early 

 in the season, to bury or crush the pupce. 



Plum Curculio (see Insects affecting the plum). 

 40 



