776 



ADDENDUM 



VEGETABLE DISEASES 



The Bean Aphis. — This, known as The Black Dolphin, is the 

 worst enemy of the Broad Bean, and unless steps are taken to 

 destroy it, it very soon ruins the crop. The best way to get rid 

 of it is to remove the tops of the plants, and if aphides are present 

 to burn them, then syringe the plants with any insecticide sold for 

 destroying black and green fly. Syringing with soap-suds on two 

 or three consecutive days has also been found effective. 



Cabbages Clubbing. — The best remedy for this is, without 

 doubt, gas-lime, which should be applied to ground, whenever 

 empty, in which clubbing has been prevalent. This should be 

 applied at the rate of 2 bushels to 3 rods if the clubbing has been 

 bad ; if not, then allow i bushel to 2 rods of ground. After lying 

 on the ground for from four to six weeks, dig the dressing in. If 

 gas-lime is not to be had, then a dressing of ordinary lime at the 

 same rate will do good. Be careful not to plant any of the 

 Cabbage family on the infected ground for at least two years. 

 Potatoes, Seakale, or Rhubarb may occupy the ground, or Onions, 

 Parsnips, or Beet may be sown thereon — in fact, any crop other 

 than one of the Brassica family. 



Celery Leaf Blight. — This, during the past few years, has 

 been prevalent, and is very often the cause of the partial or com- 

 plete failure of the crop. The disease may be recognised by local 

 crumpling of the leaf, followed by the appearance of spots on the 

 surface. The leaves rot away, after which the stems decay, and 

 finally the whole plant disappears. As the spores of the fungus 

 remain in the soil for some time afterwards, Celery should not be 

 grown in the same plot of ground for several years. Since the 

 disease is carried in the seed, growers of Celery are advised to 

 disinfect their seed. In order to do this hydrogen peroxide should 

 be used. When purchasing this disinfectant a solution known as 

 20-volume solution should, if it can be had, be obtained, but if not, 

 then a lo-volume solution may be used. The seed to be treated 

 is placed in a glass or earthenware vessel, and enough of the 

 hydrogen peroxide poured in to cover the seed. Stir the mass 

 thoroughly so that all the seeds become wet, allow the seeds to 

 remain in the liquid for three hours, then pour the liquid off and 

 reserve it for treating a second batch if need be. Before sowing, 

 spread the seed out thinly to get dry. Do not return the seed 

 that has been disinfected to the original packet, or else some of 

 the spores of the fungus causing the disease may be adhering to 

 the paper and reinfect the seeds. There is a possibility of arrest- 

 ing and finally subduing the attack, if, on the first signs of the 



