20O 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. If the 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 in situ has failed on the whole." 



Mealy bug in 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, A, 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 



