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Diseases, 



Anthracnose (Gla'osporiunt VeneiiDit) is distinguished by the drying up of 

 the leaves and the dying of the canes, especially at the tips. Small purplish spot^ 

 appear at first on both leaves and wood, but later the centre of theiii becomes gray 

 and sunken, giving a bird's-eye effect. 



Remedy : Control measures have not been effective. Prevent from spreading 

 by cutting out and destroying as soon as noticed. 



Orange Rust {Gymnoconia Peckiana). This is a very serious disease, but it is 

 easily distinguished by the yellowisih rust that appears on the leaves and canes. It 

 attacks the plant at all stages, and though the plant may not be killed outright it 

 is so weakened that it is valueless. 



Remedy: Control measures are ineffective. The diseased plants must he cut 

 out and destroyed as soon as they appear. The least delay only allows the disease 

 to spread still further. Spraying is ineffective. 



Crown Gall {Pseudomonas tumefaciens) . This attacks the roots, producing 

 galls or growths thereon which causes the weaJvening of the plants and makes them 

 unjirofitahle. It is the same as that which attacks the peach. 



Control : By digging out and destroying. Do not plant in the same field for 

 three or four years. 



Injueious Insects. 



Snowy Tree Cricket. The only injury done by this insect is in depositing the 

 eggs in the canes. They are noticed in rows from one to two inches running 

 lengthwise of the canes. Otherwise the insect is beneficial, feeding upon injurious 

 plant lice. The cutting out and destroying of the old canes in winter or early 

 spring keeps it under control. 



Raspberry Cane Borer. The injury is done by the insect making two girdles 

 around the cane about a half an inch apart hetween which the eggs are laid. The 

 egg hatches and the larva bores down in the pith of the cane. This causes the top 

 or injured portion to wilt and die. 



Control: By cutting off and destroying the wilted parts. Take care to cut well 

 below the girdle. 



Root Borer. The injury here is done by the larva or a clear winged moth 

 which bores in the root from the cane just at the surface of the ground. The canes 

 in the spring appear to be winter killed. The damage is worst in the old planta- 

 tions. 



Control: By keeping the plants healthy by exercising good care and cultiva- 

 tion. Dig out and destroy all weakened plants. 



Raspberry Saiv Fly. The damage is done by the larvae of the fly, green in 

 color, eating the tender green portions of the leaves, leaving only the veins. The 

 fly deposits the eggs on the leaves and the larvae begin feeding as soon as hatched. 



Control: If early in the season spray the plants with two pounds of lead 

 arsenate in forty gallons of water. If the fruit is ripe or ripening the larvae may 

 be jarred off by hand on to the hot dust between the rows. It is not well to use 

 the poison on the ripe or ripening fruit, because of discoloration. White hellebore, 

 either dusted over the plants or steeped, one ounce in two gallons of water and 

 sprayed over the foliage, is a very good remedy. 



