Commercial Gardening 



cleansed now and again by limewashing the walls and woodwork. In the 

 event of Greenfly appearing the plants should be syringed with nicotine, 

 soft soap, and quassia solutions, or the houses may be vaporized with 

 Richard's XL All. 



The Melon-leaf Blotch may appear if the houses are kept too hot and 

 too moist, and badly ventilated, but not otherwise, unless infection is 

 secured from a previously diseased crop. The disease is caused by a 

 fungus called Cercospora Melonis. It soon spreads in patches all over the 

 leaves when the plants are grown under unhealthy conditions. When first 

 noticed, afflicted leaves should be picked off and burned at once. More 

 air should also be given by regulating the ventilators, but the proper 

 temperature must be maintained. Too much water should be avoided, 

 and the healthy foliage may be sprayed with a solution of sulphide of 

 potassium (liver of sulphur), at the rate of 2 oz. to 3 gall, of water, as a 

 preventive. An ounce or two of camphor placed in a muslin bag, and 

 sunk in the water-tanks, has also been found a good preventive. The 

 important point, however, is to secure proper growing conditions and a 

 buoyant atmosphere. 



