480 



Fetch (C. E.). Controlling Apple Insects in the Province of Quebec. — 

 Agric. Gaz. Canada, Ottawa, iii, no. 8, August 1916, pp. 697-698. 



Observations on the occurrence and methods of control of apple 

 pests in Quebec were made between 1912 and 1915. A prehminaiy 

 survey made in 1912 showed that control by means of clean cultivation 

 was impossible, or at least very difficult, in many districts owing to the 

 rough character of the land. A marked increase in the practice of 

 spraying in the two following years resulted in a diminution in the 

 numbers of tent caterpillars [Malacosoma]. During 1915, demon- 

 strations in spraying were given in several orchards, with the result 

 that there was a marked decrease in injury due to apple curculio 

 [Anthononius qimdrigibbiis], bud-moth [Eucosnia ocellana], leaf-hoppers, 

 etc. During the present year investigations are being carried out on 

 the biology and control of the apple maggot [Rhagoletis pomonella]. 



Campbell (J. A.). The Lime-Sulphur Spraying Compound. — Jl. Agric, 

 Wellington, N.Z., xiii, no. 1, 20th July 1916, pp. 52-55. [Eeceived 

 26th September 1916.] 



lime-sulphur possesses both insecticidal and fungicidal properties 

 and can be satisfactorily used for both winter and summer spraying. 

 It may be combined with lead arsenate, but this mixture should not 

 be prepared until required, in order to avoid scorching the foliage. 

 Home-made lime-sulphur may be prepared according to the following 

 formula : — 100 lb. sulphur, 50 lb. roche-lime (95 per cent, pure), 

 50 gals, water. The resulting solution usually registers from 27° to 

 28° B6. A table for the dilution of the stock solution is given. The 

 various strengths at which lime-sulphur, based on a 33° Beaume test, 

 is recommended for use are as follows : — In winter : for apples and 

 pears, 1-10, applied just as the buds begin to swell ; for stone fruits, 

 1-15, applied in autumn and again when the buds swell. In spring : 

 for pears, 1-15 or 1-20 ; for apples, 1-25 or 1-30, applied when the 

 buds show colour. In summer : for apples and pears, from 1-100 to 

 1-120 throughout the season, combined with lead arsenate. 



RoEPKE (W.). Scelio javanica, n. sp. Rpke. (Hym. : Proctotrypidae). 



— TijdscJir. Entom., The Hague, 59th Deel, 3rd Aflevering, 15th 

 September 1916, pp. 163-169, 5 figs. 



The Proctotrupid, Scelio javanica, sp. n., here described, is a parasite 

 of grasshoppers, like the other known species of the genus. It occurs 

 in Central and East Java as an egg-parasite of CyrtacantJiacris 

 {Acridium) nigricornis, Burm., and is therefore of some economic 

 importance. It is found in abundance in the egg-masses when this 

 grasshopper has increased sufficiently to become a pest. This occurred 

 in Java in 1914 and 1915. One parasite develops in each egg. Usually 

 only some of the eggs of a mass are attacked. The proportion of 

 females to males is as 10 or 20 to 1. This species of Scelio was observed 

 during a previous grasshopper invasion in 1897 and was mentioned by 

 Koningsbergei and Zimmermann, but no name or description of it 

 was given. 



