Gibson (A.). Cutworms, Root Maggots, White Grubs and Locusts, and 

 their Control.—C anada Dept. Agric, Ottawa, Crop Protection 

 Leaflets nos. 3, 4, 5 & 6, February 1918, U pp., 7 figs. [Received 

 16th April, 1918.] 



The injury done by cutworms is described and remedial measures 

 are suggested [see this Review, Ser. A, ii, pp. 24, 521, iii, p. 564, 620]. 

 The root maggots dealt with include Phorbia hrassicae (cabbage root 

 maggot), Hylemyia antiqua, Mg. (imported onion maggot), and Phorbia 

 fusciceps, Zett. (seed-corn maggot) ; the information given has already 

 been dealt with and includes a description of tarred felt discs [see 

 this Review, Ser. A, iv, p. 347], and of the sodium arsenite bait Spray 

 [see this Review, Ser. A, vi, p. 122]. 



White grubs [Lachnosterna] threaten ta be very troublesome in 1918 

 in Canada, owing to the abundance of adult beetles that oviposited 

 in 1917 [see this Review, Ser. A, v, p. 447]. As the eggs are laid in, 

 sod land or in land bearing such crops as timothy and small grains,, 

 it will be unsafe in 1918 to plant on any land where the beetles 

 occurred in ttie previous year, except such crops as lucerne, clover 

 or buckwhea;t. Potatoes, maize and strawberries are particularly 

 favoured by the beetles. Ploughing in late summer brings many 

 grubs to the surface, where they are crushed or die from exposure. 

 Infested land might be ploughed in early spring, thoroughly harrowed 

 and planted with a late crop. This will attract grub-feeding birds.;; 

 Domestic fowls will clear infested fields of many grubs if allowed in 

 thena during ploughing. Pigs are also useful in this way [see this 

 Review, Bet. A, Y, -p. '206]. ;• 



The usual methods of control for locusts are described [see thi^ 

 Review, Ser. A, v, pp. 241 and 382], 



Ross (W. A.). Aphids or Plant lAQQ.^Canada Dept. Agric, Ottawai 

 Crop Protection Leaflet no. 8, [n. d.], 2 pp., 1 fig. [Received 

 16th April 1918.J 



This leaflet gives a few general notes on Aphids, with brief directions 

 for their control in greenhouses, gardens and in the field. a 



GiBSOjf . (A.). The Parsnip Webworm. — Canadian Horticulturist, 

 Toronto, xh, no. 3, March 1918, p. 52. 



Depressaria heracleana (parsnip webworm), which has been trouble- 

 some in Canada for the past two years, is a difficult pest to control, 

 and experimental work in this connection is still being carried on. 

 Mixtures of powdered sulphur and powdered lead arsenate, dusted 

 over the plants where the caterpillars are present, have given the best 

 results. Spraying with lead arsenate and Paris green has not been: 

 successful. 



Leopold ( — ). Commercial Dusting in a Quebec Orchard. — Canadian 

 Horticulturist, Toronto, xli, no. 3, March 1918, pp. 49-50. 



Caesar (L.). Economical Sprays and Spraying for 1918, — Ibid., 



pp. 51-52. 

 Parrott (P. J.). War-Time Spraying Problems. — Ibid., pp. 53-54. 



