This section is from the book "Commercial Gardening Vol3", by John Weathers (the Editor). Also available from Amazon: Commercial Gardening, A Practical & Scientific Treatise For Market Gardeners.
As to varieties, there are many, having green, white, or scarlet flesh. In Guernsey the kind largely grown is the "Guernsey Al ", but almost any good standard kind will do for market. Some good melons are: -
White-fleshed: Best of All, Royal Sovereign, Sutton's Universal, Golden Orange, Hero of Lockinge, The Countess.
Green-fleslted: Golden Perfection, Royal Jubilee, The Grosvenor, William Tillery, Windsor Castle, Ringleader, British Queen, Earl's Favourite.
Melons are most liable to attacks of Red Spider, but if the atmosphere is kept fairly moist and buoyant there is little to fear from this pest. The houses in which Melons are grown should be thoroughly 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.