


miscible oil spray. The directions furnished with the 
commercial product should be followed in its appli- 
cation. The spraying should be done in the spring 
after the new growth has begun to harden, and re- 
peated at three week intervals until all scale has 
disappeared. It should never be done in freezing 
weather for that will cause the plant to lose its leaves. 
The above sprays combined with Blackleaf 40 used 
according to directions will control red spider, white 
fly, and aphids. | 
Disease Symptoms 
A uniform yellowing of the leaves indicates lack 
of nitrogen, a condition which can be corrected by 
using three ounces of ammonium sulphate to a gal- 
lon of water and wetting about the base of the plant. 
This application should be followed by another of 
fertilizer, as directed before in cultural practices. 
Yellowing between the veins of the leaves, with 
the veins remaining green, is the result of a soil that 
is too alkaline. To correct this condition, apply fer- 
rous sulphate at the rate of one ounce to one and a 
half gallons of water by sprinkling upon the leaves. 
Sulphur worked into the soil at the rate of one pound 
to a hundred square feet should remedy the situation. 
Variegation of camellia leaves is sometimes caused 
by magnesium deficiency, and can usually be cor- 
rected by applying about the base of the plant three 
ounces of magnesium sulphate dissolved in water. 
There is a Phomopsis blight that attacks azaleas 
and camellias, usually a result of poor cultural prac- 
tices. To remedy, cut back all diseased portions to . 
healthy wood, then spray the plant with Bordeaux 
mixture. 
AID TO GARDENERS 
We shall be happy to aid you with your azalea 
and camellia problems. Send us a portion of diseased 
plants together with any information which you thnik — 
might be helpful. We shall attempt to diagnose the 
trouble and suggest corrective treatment. Include a 
self-addressed envelope for our reply. If you are in 
doubt about your soil, send us a sample of about two 
pounds so that we can make a complete analysis. 
From it we will be able to make suggestions for 
planting, and give you the correct fertilizer formula 
to use. To help to cover the cost of the laboratory 
work there is a charge of three dollars for each 
soil sample submitted. 



