. Report of observations of injurious insects and common farm pests, during the year ... : with methods of prevention and remedy . nd liable to cause much loss, and also to show how much we 1900] CUERANT GALL MITE. 43 still need more information as to the life-habits of this Wheat-bulbFly before being able to suggest any presumably successful means ofprevention and remedy. We do not yet know whether the fly is double-brooded; that is,whether the brood that we know hatches from the chrysalids fromabout May to July lay eggs on grasses or somewhere (at present un-known), from which may arise, in
. Report of observations of injurious insects and common farm pests, during the year ... : with methods of prevention and remedy . nd liable to cause much loss, and also to show how much we 1900] CUERANT GALL MITE. 43 still need more information as to the life-habits of this Wheat-bulbFly before being able to suggest any presumably successful means ofprevention and remedy. We do not yet know whether the fly is double-brooded; that is,whether the brood that we know hatches from the chrysalids fromabout May to July lay eggs on grasses or somewhere (at present un-known), from which may arise, in due course, flies laying the eggs toproduce the winter grubs. The remarkable and at present unexplained part of the attack isthe fact of its, for the most part, having been observed as following onfallow or exposed land. Details of circumstances of attack are givenin various of my Annual Reports referred to, and if any observerscould assist us with further information as to life-history, or means ofprevention of the pest, it would be a valuable service to all Wheatgrowers. CUERANT. Currant Gall Mite. Phytoptus ribis, Phytoptus ribis.—1, mite, greatly magnified—natural length of female 023millimetres; 2, head and fore parts, still more magnified; (by permission, afterDr. A. Nalepa). 3, mite-galls of unusually large size, with one withered and open. 44 CURRANT. [1900 So far as I am aware, the observations of the past year have shownlittle, if any, practical advance in knowledge of preventive treatmentfor Black Currant Gall Mite, which still continues to be as great apest as ever to growers. It may, however, be of service, in saving waste of time in experi-ment, and also in saving adoption of useless remedies, to give a fewdetails of severe treatment which there was reason to hope wouldsucceed as measures of ea-tt-nnination, but have failed; to mention twoinsecticides which (recommended on authority) have proved valueless ;and also to give a few notes on fumigation, r
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