421 



Felt (E. P.). Some of the Broader Aspects of Insect Control.— 



51st Ann. Kept. Ent. Soc. Ontario, 1920, Toronto, 1921, pp. 43^49. 

 [Received 15th June 1922.] 



The importance of the various phases of insect control, particularly 

 with reference to large scale repressive work, is discussed, and it is 

 pointed out that the magnitude of the problem should not preclude 

 attempts at its solution. 



Caesar (L.). Further Data on Phorhia brassicae. 



Treherne (R. C.) & RuHMAx (M. H.). The Control of the Cabbage 



Root Maggot in British Columbia. — olst Ann. Rept. Ent. Soc. 



Ontario, 1920, Toronto, 1921, pp. 50-51 & 51-53. [Received 



15th June 1922.] 



The bulk of the information in these two papers has been noticed 

 elsewhere [R.A.E., A, ix, 127, 372]. The experiments carried out 

 in 1920 with mercury bichloride on a commercial scale leave no doubt 

 as to the efficac}' of the treatment for such purposes. 



Ross (W. A.). Notes on the Control of the Rose Midge. — olst Ann. 

 Rept. Ent. Soc. Ontario, 1920, Toronto, 1921, pp. 63-66. 

 [Received 15th June 1922.] 



This information has been taken from a previous paper [R.A.E., A, 

 vii. 211]. 



Maheux (G.). Report on Injurious Insects in Quebec District for 

 1920.— 51st Ann. Rept. Ent. Soc. Ontario, 1920, Toronto, 1921. 

 pp. 70-72. [Received 15th June 1922.] 



Most of this information has already been noticed [R.A.E., A, x, 321]. 

 Other pests recorded include Macrobasis nnicolor, Kirby, on potato 

 plants ; Smynthums hortensis, Fitch, on beans ; and Phenacoccus 

 acericola, King, on sugar maple. 



HoRTON (J. R.) & Satterthwait (A. F.). The Chinch Bug and its 

 Control. — U.S. Dept. Agric, Washington, B.C., Farmers' Bull. 

 1223, February 1922, 35 pp., 14 figs. [Received 15th June 1922.] 



The three chief methods of destroying chinch bugs {Blissiis leuco- 

 pterits, Sav) are the burning or ploughing of their hibernating places, 

 which are found in bluestem and other bunch grasses in pastures, 

 neglected fields, roadsides, etc., in November and December ; by 

 spra3'ing in wheat fields and trapping by means of barriers in May 

 and June, followed by spraying in marginal rows of maize if necessary ; 

 and by ploughing maize stubble deeply in September before the bugs 

 have gone into winter cover. It is pointed out that an outbreak 

 is most likely where there are suitable hibernating places, and 

 when warm, dr\^ weather occurs during the two critical hatching 

 periods, namely May to June and August to September. The most 

 suitable implements and materials for use in control work are 

 described, and the necessity is urged for co-operation in all remedial 

 campaigns. 



