259 



BoRNER (C.) & Thiem ( — ). Neuere Versuche zur Reblausbekampfung,. 

 [Recent Experiments in combating Phylloxera.'] — Zeitschr. angew. 

 Ent., Berlin, vii, no. 2, February 1921, pp. 465-466. 



The spread of the vine louse [Phylloxera vastatrix] in valuable 

 vineyards on the Rhine has led the Prussian and Hessian govern- 

 ments to make further experiments in perfecting remedial measures. 

 The Imperial Biological Institute is examining these and will report 

 later. 



Aussprache iiber die Bekampfung tierischer Rebschadlinge. [A Dis- 

 cussion on Measures against Animal Pests of the Vine.] — Zeitschr. 

 angew. Ent., Berlin, vii, no. 2, February 1921, pp. 466-471. 



In a discussion on the action of a number of insecticides on vine 

 pests it was pointed out that Urania green can be used without any 

 risk of scorching if it is combined with a lime-copper spray. The 

 mixture is best prepared as follows :- — ^To obtain 50 gals, of solution, 

 12 oz. Urania green and about 20 lb. slaked lime are put in a 

 container with enough water to produce a uniform fluid paste. About 

 25 gals, water are then gradually added and well stirred in. A solution 

 of 10 lb. copper sulphate in 25 gals, water is then added very slowly, 

 stirring being continued. The completed spray must turn phenol- 

 phthalin red, otherwise more lime must be added. The Urania green 

 does not separate out in this mixture, which is excellent in every way. 



Lessard (E.). Insectes nuisibles des Forets : La Vanesse de rOrme 



{Vanessa antiopa, Lin.). — Nat. Canad., Quebec, xlvii, no. 8, 

 February 1921, pp. 169-174. 



Vanessa antiopa is found from May to September, mainly on elms, 

 though it also attacks willow and poplar. The eggs have been observed 

 on the canoe birch {Betula papyrifera) and on white birch {B. populi- 

 folia). but they are usually found on the branches and underside of 

 the leaves of elm. 



As the larvae tend to be gregarious, infested branches can be cut 

 out and burnt. They are also easily shaken from the tree, or the 

 torch method can be employed. Arsenical sprays and the use of 

 sticky bands are recommended. 



MiTCHENER (A. v.). The Western Wheat-stem Saw-fly. — Manitoba 

 Agric. Coll.. Winnipeg, Circ. 57, August 1920, 3 pp., 2 figs. 

 [Received 29th March 1921.] 



A brief account of Cephus occidentalis (western wheat-stem saw-fly)^ 

 and its control is given [R.A.E., A, iii, 630 ; v, 265]. The damage- 

 in Manitoba is chiefly confined to wheat. By actual count in one field 

 in August 1920 as many as 55 per cent, of the wheat-stems were affected. 



j\IiTCHENER (A. v.). Poisoning Grasshoppers. — Manitoba Agric. 

 Coll.. Winnipeg. Circ. 59, February 1921, 4 pp., 3 figs. 



The illustrated description of the Manitoba poison mixer shows it 

 to be a horizontal drum in which the mixing is done by rotating 

 stirring rods, a catch preventing the drum from revolving. By 

 releasing the catch, the drum can be turned so as to discharge its- 

 contents. 



