The Control of Insect Pests and Plant Diseases. 



595 



These small black beetles riddle the leaves with small holes and 

 Flea-beetles, cause them to die. Bordeaux mixture as applied for potato 

 blight protects the plants by making them distasteful to the 

 beetles. See under potato blight, page 496. 



QUINCE. 



This curculio is somewhat larger than that infesting the plum 

 Quince and differs in its life-history. The grubs leave the fruits in t he 



curculio. fall and enter the ground where they hibernate and transform 

 to adults the next May, June or July, depending on the season. 

 When the adults appear jar them from the tree onto sheets or curculio-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. 



RASPBERRY. 



BLACKBERRY AND DEW- 

 BERRY. 



The greenish, spiny larvae feed 

 Saw-fly on the tender leaves in spring. 



Spray with Paris green or arsen- 

 ate of lead, or apply hellebore. 



The larva is a grub that bur- 

 Cane-borer. rows down through the canes, 

 causing them to die. In laying 

 her eggs, the adult beetle girdles the tip of the 

 cane with a ring of punctures, causing it to wither 

 and droop. In midsummer cut off and destroy the 

 drooping tips. 



ROSE. 



Aphis and 

 leaf-hopper. 



ever 

 with 



necessary, 

 6 parts of 



The green plant-lice (Fig. 

 204) usually work on the buds, 

 and the yellow leaf -hoppers feed 

 on the leaves Spray, when- 

 with kerosene emulsion, diluted 

 water, or whale-oil or any good 

 soap, I lb. in 5 or 6 gals, of water, or with one of 

 the tobacco extracts. 

 Rose-chafer. See under grape. 

 Rose-slug. See under pear slug. 



STRAWBERRY. 



These large curved white grubs 

 White grubs. (Fig. 205) are the larvae of 

 the common June beetles. 

 They live in the ground, feeding on the roots of 

 grasses, weeds, etc. Dig out grubs from beneath in- 

 fested plants. Early fall cultivation of land in- 

 tended for planting will destroy many of the pupae. 



Fig. 204. — Rose aphis or plant- 

 louse. 



Fig. 205. — While grtib. 



