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but are most abundant in the summer. Our knowledge 
of the life-history of this Mite is incomplete, we still 
require definite information as to whether the species can 
pass the winter elsewhere than in the buds—whether it can 
survive under the bark, in the roots, or beneath the soil. 
With regard to remedial measures, so far as I am 
aware, no completely successful methods of treatment have 
yet been devised. Instances are known where all diseased 
bushes in a plantation have been cut down, the stumps and 
root stocks subjected to treatment, and yet the young 
shoots came up infested with this Mite. It is of first 
importance to cultivate from perfectly clean stock, and 
cuttings taken for setting should also be selected from 
such plants. Hand picking of the infected buds at the 
end of winter is valuable, and all buds collected should 
be burned as soon as possible; with badly infected shoots 
extensive pruning is necessary. When the bushes are very 
badly infected there is no remedy beyond taking up and 
burning them, followed by replanting with clean new 
stock. Spraying or dusting with a mixture of lime and 
sulphur during the migratory period has been recom- 
mended, but often the results are unsatisfactory. An 
efficient spraying mixture still remains to be discovered. 
Some varieties of currant are claimed to be less severely 
attacked than others, and among them may be mentioned 
the Boskoop Giant, Lee’s Prolific. and Edina. Varieties 
claimed to be immune have been placed on the market, but 
whether they will remain so time alone will determine. 
There is a possibility that careful selection and inter- 
crossing of likely varieties along scientific lines may lead 
to the production of resistant stock. 
