The above method of growing violets con tinuously under glass is considered the most saiisfactory since the plants are always under complete control. There are, however, other methods which are of more or less importance, such as combining house culture with field cul ture, the plants being cultivated out of doors until early or mid aututnn and then trans planted to the greenhouse. Large quantities are also cultivated in frames either with or without artificial heat, the plants being grown either in the field or in beds which are covered with the frames at the approach of cold weather. This method is most popular where the winter tem perature is not very low, as in Virginia and southward. Violets are sometimes grown in. pots but this method is considered too expensive for commercial purposes and is also likely to prove unsatisfactory and incom enient.
Since the Niolet is esteemed mainly for its fragrance, the flowers should be gathered just before reaching prime condition. and placed on sale as soon as possible because the odor is anescent. A definite knowledge of the de mands of the market is also essential since some markets demand bunches of certain sizes or forrns and will not handle other sizes or forms profitably. The bunching demands great skill
and taste and in the larger establishments is usually done by girls.
Several insects feed upon the violet, the most common being the black fly (Rhopalosihpum violce), the green Ily (Aphis sp.), gall-fly, (Diplosis violet sawfly (Entplutus canadensis) and the greenhouse leaf tyer (Phlychenia rubigallis). The red spider (Tet ranychus telariusl, which is not an insect but a mite, also lives upon the foliage. Its visitations may be prevented by due attention to ventilation and humidity of the air. The method of con trolling the others seems at present to be hydro cyanic acid gas, but intelligent management is considered more satisfactory. It is preventative rather than remedial. The so-called disease, are most effectiN ely prevented by attention tc, watering, ventilation and ample space for each plant to grow in.
Consult Galloway,