EXPERIMENT STATION BULLETINS. 819 



STRAWBERRY ROOT BORER iAnarsia lineatella) . 



It is also the second worst enemy to the peach in this state where it is 

 known as the peach-twig moth, because it bores into the twigs and early 



bnds of the peach as they are expanding and 

 kills them. In the strawberry it bores into 

 the crown and down through the heart into the 

 larger roots and usually kills the plant. Closely 

 related to the root borer in work is the straw- 

 berry crown borer {Tyloderma fragarice) 

 which, in the grub state, destroys the crown by 

 boring into it. 



Remedy. — Probably the most satisfactory 



^ remedy is a rotation of crops so that the plants 



„. „^ „. , o ^ o will not bear more than two crops of fruit before 



Fig. 83.— strawberry Root Borer; a, ^ ., ^ iiiiT- 



moth,6, larva; c, papa. they are plowed up and a new bed planted m 



another place. If the insects are known to be at work in the plants at the 

 fruiting season, the plants should be burned before the insects have time 

 to mature and escape. 



DISEASES OF THE RASPBERRY AND BLACKBERRY. 

 ANTHRACNOSE (Glceosporium venetum, Speg.). 



When the young canes are about one half grown, small purplish spots 

 often appear upon them, and in a short time the centers of these spots 

 become white. If the spots are sufficiently numerous, a considerable area 

 of the canes may be infected and great injury may be done, as not only will 

 the fungus take up the sap of the plant, but, the tissues being broken, there 

 will be a very rapid loss from evaporation, and the spots may dry out to a 

 considerable depth. 



The disease may extend to the small branches, fruit stems, and to the 

 leaves. If the area involved is sufficiently large, the entire circulation 

 may be cut off, and the berries and upper portions of the canes will dry up. 



In the case of an old plantation, the old canes and those of the new ones 

 that are most infected should be removed as soon as the crop is gathered, 

 or at any rate early in the following spring, and the remaining plants 

 should then have a thorough spraying of copper sulphate solution or of 

 Bordeaux mixture, with later applications the same as for a new plantation. 



When a new plantation is to be put out the plants should be obtained 

 from a young plantation that is but little if any infected with the disease. 

 In the case of red raspberries and blackberries, it will be desirable to have 

 plants that have been grown from root cuttings. They should be 

 thoroughly sprayed at least three times the first season, and the second 

 season it will be well to spray before the buds start, again as the new canes 

 are a foot or so high, and a third time after the crop has been gathered. 

 For the first and second applications, the copper sulphate solutions can be 

 used, remembering that, after the foliage is out, it is not well to use more 

 than one pound of the copper sulphate for two hundred and fifty gallons 

 of water. 



