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The American Gooseberry Mildew, [april, 



be discovered on the plants, in spite of these precautions, 

 the case should at once be reported to the Board. A few slips 

 of bushes showing the disease in its most marked form should be 

 cut off and sent carefully packed in a strong wooden or metal box 

 (not a cardboard box) with the report to the Board. ^The 

 postage on letters and packages sent by letter post need not be 

 prepaid. All other suspected shoots should be cut off and 

 destroyed at once. Care should be taken to see that the light 

 conidial spores on the bushes are not distributed by the wind to 

 other plants, and the knife or shears used in catting off the slips 

 should be disinfected immediately afterwards by dipping in the 

 spray fluid. The Board will inform the correspondent as soon as 

 possible if the plants are affected with the American gooseberry 

 mildew, and if so he should then take immediate steps to 

 prevent the disease spreading. 



The best means to be adopted will vary in different cases. 

 The following are suggestions for guidance. Growers must 

 remember that during the summer months the spores which 

 spread the infection are very readily carried from plant to 

 plant. They should therefore aim (i) at getting rid of all 

 infected material as soon as possible ; (2) at destroying all leaves, 

 buds, and fruit to which it is at all probable that infection has 

 spread. In dealing with small bushes the best plan would be 

 to prune off the branches one by one, to drop them into a pail, 

 and then to destroy by fire or by steeping in a cask containing 

 a solution of 4 oz. bluestone (copper sulphate) or 2 oz. liver of 

 sulphur to 1 gallon of water. In the case of large bushes, it 

 would usually be best to prune off all the young shoots and 

 then to destroy the leaves on the lower part of the bush by em- 

 ploying a spray containing 8 oz. bluestone to 1 gallon of water. 

 It would not be safe to attempt to cut down or dig out affected 

 bushes during the summer, for in doing so workmen would 

 probably spread the disease. 



Having disposed of all diseased material and of the leaves, 

 buds, and fruit on all plants to which infection may have 

 spread, the grower should next spray the whole plantation with a 

 solution of \ oz. of liver of sulphur to 1 gallon of water. He should 

 repeat the spraying within a week and continue it at inter- 

 vals of ten days throughout the rest of the season. Spray- 

 ing should be done on a dry day ; if rain should fall soon after 



