1358 THE FRUIT INDUSTRY IN ^EW YORK STATE 



Raspberry Cane-Borer 



In June, eggs are laid singly by small beetles in the young 

 shoots, about six inches from the tips of the canes. Two rows 

 of punctures encircling the cane are made, one below and another 

 above the egg. The girdling results in a withering or drooping 

 of the ends of the young shoots. After natching, the borer eats its 

 way downward. The wilted tips should be cut off well below the 

 girdled spot, and some of the older borers may be destroyed by 

 cutting and burning the old fruiting canes as soon as the fruit has 

 been harvested. 



Raspberry Saw fly 



Eggs are laid in May or early June within the tissue on the 

 under side of the leaves by small, dark-colored flies. After hatch- 

 ing, the larvae eat away the leaf tissue. They are pale green, 

 thickly covered with whitish spines. The larvae may be readily 

 destroyed by arsenical sprays ; or, if near harvest time, the plants 

 may be dusted or sprayed with hellebore. In the latter case use 

 one ounce of hellebore per gallon of water. 



Red Spider 



In dry seasons, small, yellowish-red mites are sometimes found 

 in large numbers, infesting the foliage. A spray of soap and 

 nicotine extract will kill all that are hit by the spray. Severe 

 rains usually keep the mites in check so that they are not often 

 numerous enough to require a spray treatment. 



DISEASES 



Cane Blight 



The leaves wilt and the canes die as the fruit reaches maturity. 

 The wood becomes discolored in large or small patches, often en- 

 circling the cane. Cut out and burn infested canes; set only 

 healthy plants ; remove fruiting canes at once after harvest ; give 

 the best of cultural treatment ; make frequent renewals of planta- 

 tions. 



Yellows 



Plants are dwarfish or stunted in growth, the foliage is a 

 mottled, yellowish-green, and the fruit does not mature properly, 

 becoming dry and insipid. The cause is unknown and no remedy 

 suggested except renewal of plantations. 



