PLATYCLINIS 
This compost should be of two-thirds osmunda fiber and one-third live 
sphagnum moss. They need a free supply of water, but when growth is dormant it 
should be withheld for the most part, but it is not advisable to allow plants to dry 
to the shriveling point. They do well suspended from the roof. 
VANDA 
Vandas seem to grow best when coarsest osmunda fiber is used with large 
pieces of charcoal. They should be repotted when the compost begins to decay 
and when they begin making new growth. 
Vanda coerulea should be grown as cold as possible from November to 
March — night temperature 45° — and given as much sunlight as possible at all 
seasons of the year, short of burning the leaves. When the leaves are a light shade 
of green there will be more flower spikes than on those having beautiful dark green 
foliage. An abundance of air should be given at all times, weather conditions per- 
mitting, and water should be withheld when plants are not in active growth, only 
syringing at this time. At no time should the compost remain soggy. Vandas do 
best suspended near the glass. 
DISEASES AND INSECTS 
Wet-rot is brought on by an over-moist or stagnant atmosphere, and is 
usually detected by a semi-transparent appearance of the parts affected, which 
soon become dark brown. If noticed at the commencement, it can be readily 
checked by shitting the outer skin with a sharp knife, and removing the plant to a 
more airy position for a few days. 
Dry-rot is caused by a fungus which attacks the rhizome of the plant. It 
is often produced by burying the rhizome, or base of the plant, in the compost. 
Cypripediums are susceptible to it. Large healthy growths, when attacked, show 
a sickly pale color in the foliage. On examination of the base, it is found discolored 
or of light brown appearance. If the affected portion is quickly removed with a 
sharp knife, it will usually give no further trouble; otherwise, it will spread and 
destroy the plant. 
Spot. The appearance of small, dark brown spots on the leaves and 
pseudo-bulbs is usually an indication of cold and overwatering. The affected parts 
should be slit with a sharp knife, and a mixture of charcoal and sulphur rubbed on 
the wound. 
Thrip and Scale. Frequent syringing with a nicotine insecticide, with soap 
added, will control these pests. It is good practice to use this insecticide fortnightly 
as a precaution. Use a fine nozzle and apply all force possible. 
Cattleya Beetles. These can be controlled and, in fact, eliminated, by sys- 
tematically spraying with Rotenone and Derris Root Insecticide to which soap has 
been added. 
Snails and Garden Slugs are one of the worst pests. As they do their work 
L 
~§ 63 }- 
