200 FUMIGATION METHODS 
under constant inspection. <A fortnight later a second 
batch of young bushes was similarly treated and with 
identically good results. 
The cost of chemicals is only about a penny per 
thousand bushes and the labor involved trifling. All 
cuttings should be fumigated before being set. Black 
currants so quickly come to a good bearing size that 
it would be well to grub a badly infested plantation 
and start afresh with fumigated young stock. 
To the above report A. D. Hall, the principal of 
the college, adds the following: ‘‘I am not by any 
means disposed at present to definitely recommend the 
hydrocyanic process other than by way of experiment, 
and until we have seen more results I should prefer to 
say nothing. Ifthe process recommended be carried 
out in the winter, when the temperature is low and 
the bushes in a dormant state, no injury whatever is 
done to the plants. The real difficulty lies in the eggs 
of the mite ; it seems to be always laying eggs, except 
perhaps in the very coldest weather ; and though we 
are now sure the adult mite is killed by the treatment 
we are still doubtful about the eggs. The treatment 
of large bushes 77 sztz has failed on the whole.’’ 
Mealy bug tn vineries and conservatories.—Through 
the kindness of Colonel Ready, of Goudhurst, and Mr. 
Hammond, of Ramsgate, Mr. Cousins was enabled to 
try the effect of cyanide fumigation under a variety of 
conditions. ‘Three vineries, 4, B, and C, were twice 
treated, as was also a large conservatory. In each 
case the attack of the mealy bug was severe. 
Vinery A.—The capacity of this house was 3,430: 
cubic feet. It contained an early variety and was 
