189 



Georgeson (C. C). Report of the Alaska Agricultural Experiment 

 Stations 1915. — U.S. Dept. Agric, Washington, B.C., 24th 

 November 191G, pp. 41-42. [Received 8th March 1917.] 



The cabbage maggot, Chortophila {Pegomy'ui) brassicae, is the worst 

 pest of horticulture at the Sitka Station. Tarred felt disks were used 

 as a method of control for Cruciferous plants, but were not suitable 

 for such plants as turnips or rutubagas, which consequently suffered 

 considerably. A Lej)idopteron that damaged apples to some extent 

 is being identified, but is suspected to be Agryresthesia conjugella, 

 which is especially abundant in Norway and Sweden and is known 

 in l^ritish Columbia. It probably may be controlled by the same 

 methods that are used against codling moth [Cgdia pomonella]. A 

 green aphis has been troublesome in green-houses, but was controlled 

 by fumigation with nicotine paper. The climate is too damp for 

 Aphids to thrive in the open. 



Urbahns (T. D.). Tetrastichus bruchophagi, a recently described 

 Parasite of Bruchophagus funebris. — Jl. Agric. Research, Wdshing- 

 ion, B.C., viii, no. 7, "l2th February 1917, pp. 277-282, 1 plate. 



The Kulophid, T. bnicko'phagi, Gahan, has recently been reared 

 from B. funebris infesting lucerne over a widely distributed area in 

 California. It is probably the first of the parasites of B. funebris 

 to appear in the field in early spring, searching over the green seed-pods 

 for seeds infested by its host. The female forces the ovipositoi- 

 through the seed-pod and into the infested seed, placing an egg upon 

 the larva within. When the parasitic larva is fully grown, it enters 

 upon a dormant period, which lasts not less than about 10 days, 

 and may continue until conditions for pupation are favourable ; 

 this stage sometimes includes hibernation, the pupa being formed 

 in the following spring. The length of the pupal stage varies from 

 6 to o5 days. The adult, upon emergence, finds itself completely 

 enclosed within the seed which has been hollowed out by its host. 

 It gnaws a small hole through the seed wall and through the seed- 

 pod and thus makes its escape. Under favourable conditions, there 

 are from 2 to 4 generations in a season. In California the parasite is 

 of considerable importance, destroying about 50 per cent, of the 

 larvae of its host on lucerne. In Arizona, however, it is at present of 

 very little importance. 



Parrott (P. J.) & HoDGKiss (H. E.). Miscellaneous Notes on Inju- 

 rious Insects. — N. Y. Agric. Expt. Sta., Geneva. Bull. no. 423, 

 August 1916, pp. 359-387, 8 plates, 4 figs. [Received 9th March 

 1917.] 



Among minor fruit pests in New York, the orchard ermine moths, 

 Hyponomeuia malineUus, Z., and H. padellus, L., are being introduced 

 in large numbers into this State by importations of foreign-grown 

 nursery stock. In 1915 the number of localities aftected exceeded 

 previous records, but the infestations were largely confined to apple 

 seedlings. The leaf weevil {AiMmetis gramdnUi, Say) has a wide 

 range of distribution. It has not been recorded in destructive numbers 

 of late years, and, v^'hen recorded, has onlv been found attacking nurserv 



