For the fungus mildew, half an ounce of sulphide of potassium mixed in a gallon of water and applied by a syringe is recommended (Wright). Finely-powdered quick-lime mixed with sulphur (double the quantity of the former), and distributed by a special bellows (see before, page 39), is also said to be a good remedy.
For dimensions see under pears. Plums are best in pots or tubs, as they can be taken out when at rest. They are very liable to attacks from aphides, but the insecticide for pears in pots is good also for plums. The house must be fumigated, and the trees syringed on the least appearance of aphis. Place the pots on bricks (v. pears). When growth is being started the temperature should be from 45° at night to 50° by day. Soft or tepid water should be given freely. Fumigate again just before the flowers come out. As the buds increase, raise the temperature 5° to 10° and syringe once or twice a day with tepid water. But a dry atmosphere is important while the trees are in flower. Admit air as well as bees in the forenoon, and pass a camel-hair or light brush over the flowers about the middle of the day. When the fruit is set, syringe at least once a day; if the weather is hot, twice or even three times a day, and give all the air possible. Thin the fruits (if the crop is large) with scissors; mulch and feed with weak liquid manure (see pears). The shoots must be pinched if the trees are of any age, at the fifth or sixth leaf. Not much heat is needed generally, but when the stoning period is passed, the ripening process may be hastened by a higher temperature. The house may be closed at an earlier hour if necessary. Avoid extremes. As the fruits ripen, cease gradually to syringe, but keep the house moist by sprinkling water over the paths, etc. Choose the choicest dessert sorts: Early Transparent, Dennistoun's Superb, July Greengage, Jefferson, Count Althann, Coe's Golden Drop, Guthrie's Late Green, Angelina Burdett, Bryanstone Gage, and Golden Transparent; and if darker colours are desired: Early Prolific, Belgian Purple and Czar. Bryanston Gage was recommended by the R.H.S. in 1892, and is a very richly-flavoured dessert variety, but is not a good cropper in the open, and needs a wall or house.
Damsons
are often very valuable, and also make good outside hedges. Bradley's "King of the Damsons" is the best. The fruit is large, the tree "free-cropping, bushy, vigorous, erect." R. September 20. Frogmore Prolific (earlier) is also large and free-bearing. R. September 9. Both these are late. Mirabelle and Rivers' Early Damson are August damsons, small, the former vigorous.
Bullaces
Shepherd's is the best, and hangs late on the tree. A few trees in a large garden are useful. R. September 20.
Important Points
Good sorts on suitable stocks in good soil and proper aspect; lime in the soil, added or otherwise; winter washing or spraying; thinning fruit; early training; moderate pruning; root-pruning in very strong soils; lifting in shallow soils; liquid and other manures; immediate action if aphides or red spider appear.
Drying by Evaporation