'262 JOUENAL OF THE ROYAL HORTICULTUEAL SOCIETY. 
paper. If in the meantime the proprietors of any of the various com- 
pounds would care to forward samples for testing purposes I should be 
glad to receive them. 
Both outdoor and greenhouse and conservatory work is usually 
carried out in the winter months when other work is slack, and while 
plants are more or less in a resting condition and can better resist the 
action of the insecticides. But certain " bug " and other coccids increase 
so rapidly as summer advances that plants require frequent attention, 
which must necessarily be given wherever there is available help. 
In spring and summer time dull or cloudy days should be selected for 
the treatment of plants. Applications made in bright sunlight "scorch" 
and otherwise injure the foliage. Failing dull days, apply the insecticide 
in the evening after the sun has gone down. And when tender plants 
have been treated, follow the application a few hours later or the follow- 
ing morning with a thorough syringing with cold water. 
General Remarks. 
Unless yon are thoroughly acquainted with the insecticide intended 
for use, test it upon a part of the plant or plants to be treated, and watch 
the result. 
