302 
Garden Work 
as stigmata, or spiracles, and are simply the openings into 
the breathing tubes or tracheae. Now, if these tubes are 
choked or blocked, the insects must die. The writer re- 
members a fine border containing hundreds of Roses which 
were very badly infested with “the fly”. The owner was 
about to prepare some material with which to destroy 
them, when a strong wind sprang up, blowing the dust 
in clouds all over the bushes, leaving them quite white. 
During the night a heavy storm came on, and in the 
morning the bushes were found to be entirely free from 
“the fly”. The dust had clogged their breathing tubes, 
causing the creatures to be suffocated, and the rain had 
washed the dead insects off. 
A good remedy is to mix 2 oz. of soft soap in a little 
water. Into this put 1 oz. of paraffin oil, then make up 
to 1 gall, with boiling water, stirring thoroughly while 
pouring the latter in. After it has cooled it should be 
well stirred and put on the plants with a syringe, to en- 
sure it being forced in among the insects. The soft soap 
makes the material stick to the insects. This should be 
done in the evening, when the sun goes down. Quassia 
chips are another safe remedy for Greenfly. It is, how- 
ever, a tedious mixture to prepare. One pound of the 
chips should be steeped in water for a considerable time, 
then put into a vessel with 1 gall, of water, and allowed 
to simmer for from twelve to twenty -four hours, after 
which it should be thoroughly mixed with 10 oz. of soft 
soap and then made up to 10 gall, with water. This >s 
a safe and effective remedy for Greenfly, &c. 
American Blight or Woolly Aphis. — This insect 
belongs to the same class as the ordinary Aphis, but it 
