389 



is a four-year rotation of oats followed by clover ; the clover cut for 

 hay and replaced by wheat ; clover again in the spring of the third 

 year, which may be ]:»astured or allowed to grow ; and the land then 

 plougliecl and prepared for cereals and roots. 



Griddle (N.). The Western Wheat-stem Sawfly and its Control.^ 



Canada 'Dcpl. Aij^ric, Ottaica, Pamphlet N.S. no. 6, April 1922, 

 8 pp., 2 figs. 



CcpJnts cihlIus, Nurt. (Wc^stern wheat-stem sawfly) has become very 

 injurious in Canada owing to having spread from wild grasses to 

 cultivated plants such as wheat and rye. Much of the information 

 given on the life-history and habits has already been noticed [R.A.E., 

 A, iii, 630 ; v, 265 ; viii, 4641. The remedial measures suggested are 

 ploughing all infested stubble between 1st August and 6th June to a 

 depth of not less than 5 in. and turning it completely upside 

 down, this being the only way to prevent emergence of the flies. Rye 

 grass should be cut between 5th and 20th July in order to kill the 

 larvae before they reach the ground. On land intended for summer 

 fallow a thinly sown strip or two of wheat will induce many flies to 

 oviposit, and this crop should be ploughed about mid- July in order to 

 kill the larvae. Immune crops that can be safely sown include oats, 

 barley and winter rye, and clover, flax, and all other broad-leaved 

 plants. 



Champion (H. G.). Note on the Death of Chir {Pinus longifolia) 

 Poles in the Almora Plantations of Kumaon. — Ind. Forester, 

 Allahabad, xlviii, nos. 4-5, April-Mav 1922, pp. 168-174 & 

 232-246, 2 figs. 



For the last fifteen or twenty years at least there has been a con- 

 siderable mortality among chir (Pi)ius loiigifolia) from sowings made 

 since 1875 near Almora. This mortalit}' is sufficient to nulHfy attempts 

 to complete the stocking of the poorer areas. The general indications 

 are that the attacks of the fungus, Pcridermitim comjilanatum, are in 

 all cases primary, and that its presence is very easily overlooked at 

 first, but reduced resistance and the flow of resin ultimately caused 

 attract various destructive insects, of which the chief are Crypto- 

 rrhynchus brandisi, Stebbing.and aTortricid motli, RJiyacionia {Retinia) 

 sp. A Longicom, Notorrhina muyicata, Dalm., and a Scolytid, Poly- 

 graphtis longifolia, Stebbing, are of less importance, though by no 

 means negligible. Ips longifolia, Stebbing, Melanophila ignicola, 

 Cham.p., and Platypus biformis, Chap., need not be taken into account. 

 A Coccid, Ripersia sp., is often common, but while it is not impossible 

 that its attack may facilitate an infestation by Peridermium or by 

 insects, it certainly cannot be the chief cause of the injury. 



Subra:\iama Ivek (T. ^ .). Notes on the More Important Insect 

 Pests of Crops in the Mysore State. III. Diptera. IV. Rhynchota. 



— //. Mysore Agric. & Exptl. Union, Bangalore, iv, no. 1, [1922J 

 pp. 18-24, 3 figs. 



Mangos, guavas, peaches, melons, gourds, etc., as well as wild fruits 

 such as Diospyros niontana, are attacked by three or four species of 

 fruit-flies. 



