The Cuxtrul of Imsect Pests and Plant DisE/'ises. 



60: 



This is a disease caused by bacteria that get into the sap-tubes 

 Wilt. of the leaf and stem, clog and destroy them, causing the plant 



to wilt. The bacteria are distributed chiefly by striped cucum- 

 ber beetles. Destroy the beetles or drive them away by thorough spraying with 

 Bordeaux, 5-5-50. Gather and destroy all wilted leaves and plants. The most 

 that can be expected is that the loss may be slightly reduced. 



Leaf-spot and 

 anthracnose. 



•\. A^:^ 



CURRANT. 



Very destructive in the Hudson Valley. Canes die suddenly 



Cane-blight while loaded with fruit and leaves like those attacked by the 



or wilt. cane borer. Caused by a fungus which kills the bark in places 



and discolors the wood. No definite line of treatment has 

 Vieen established, but the following is suggested: Beginning when the plants are 

 small, go over the plantation three or four times every summer and cut out and 

 bum all canes showing signs of disease. Geneva Bulletin 167, p. 292. 



This is caused by two 



or tiiree different fungi. 



The leaves become spot- 

 ^^S- 213. ted. turn yellow and fall 

 prematurely. It may be controlled by 

 three to five sprayings with Bordeaux, 

 5-5-50, but it is doubtful whether the 

 disease is sufficiently destructive on the 

 average to warrant so much expense. 

 Upon the first appearance of currant worms, 

 spray with Bordeaux and Paris green, i lb. 

 to 100 gals., or with arsenate of lead, 4 lbs. 

 to 100 gals. Repeat if a second brood of 

 worms appears. Iowa Bulletin 30 and 

 Geneva Bulletin 199. 



GINSENG. 



s.:i4 







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f; 



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Fig. 213. Currant leaf -spot. 



Fig. 214. Ginseng blighi. 



Altemaria This is the most destructive and common disease of cultivated 



blight. ginseng. First, spray the surface of the soil thoroughly with 



Fig. 314. copper sulfate solution, i lb. to 10 gallons, early in the spring 



