Brambles and Cherries 351 



RED or ORANGE RUST (Gymnoconia interstitialis) . Dense, red, 

 powdery growth on under side of leaves of black raspberries 

 and blackberries. 



Dig .up and destroy affected plants. 



RASPBERRY ROOT-BORER (Bembeda marginata). Larva about 

 1 inch long, boring in the roots and the lower parts of the cane, 

 remaining in the root over winter. 



Dig out the borers. Destroy wild berry bushes. 

 RASPBERRY SAW-FLY (Monophadnus rubi). Larva about ^ 

 inch long, green, feeding upon the leaves. 



Hellebore; arsenicals, after fruiting. 

 RED-SPIDER. See Peach. Do not use lime-sulfur on raspberry 



foliage. 



TREE-CRICKET (CEcanthus nigricornis) . Small and whitish 

 cricket-like insect, puncturing canes for 2 to 3 inches, and 

 depositing eggs in the punctures. 



Burn all infested canes in winter or very early spring. 

 Cherry. BROWN-ROT (Sclerotinia fructigena). The flowers decay, 

 the leaves become discolored with irregular brown spots, 

 and the fruit rots on the tree. 



Spray with bordeaux mixture, 4-^r-50, or lime-sulfur, 

 1-40 (1) just before the blossom buds open; (2) just after 

 the blossoms fall; (3) one or two more applications at inter- 

 vals of ten days. 



APHIS (Myzus cerasi). Blackish plant-lice infesting the leaves 

 and tips of new growth. 



Spray as soon as the first lice appear, with whale-oil soap 

 or tobacco extract. 



BLACK-KNOT. See under Plum; same disease. 

 CHERRY FRUIT-FLIES (Rhagoletis dngulata and R. fausta). 

 Small maggots infesting ripening fruit. Adults are flies with 

 banded wings and insert their eggs under the skin of the fruit. 

 Spray with arsenate of lead, five pounds in one hundred 

 gallons, sweetened with three gallons of molasses to kill flies 

 before egg-laying. Should be done when flies first appear, 

 last of June in New York. 



CHERRY TREE TORTRIX (Archips cerasivorana) . Tips of branches 

 are frequently webbed into nests by colonies of lemon-yellow 

 caterpillars. 



Wipe out nests and destroy the caterpillars. 



