142 ! 



Ol. (I. A.). AoJiroHOCHKM, BpeAniM'ie nnoAOBbiM-b AepeebRMii m Mtpu 



6opb6bl Cb HMMM. [Weevils injuring fruit-trees and their 

 control.]— « riporpeCCHBHOe CaAOBOACTBO M OropOAHMMeCTBO.» 



[Progressive Horticulture and Market-Gardening], Petrograd, xiii, 

 nos. 3, 4 & 5, 30th January, 6th & 13th February 1916, pp. 85-87, 

 115-119 & 142-148. 



This paper gives an account of the life-history and control of various, 

 harmful weevils including : — Anthonomus pomorum, L., Rhynchifes 

 pauxillus, Germ., R. bacchus, L., R. gi^anteus, Kr., R. aiiratus, Scop., 

 R. cupreus, L., R. aeqtiatus, L., ByctiscMS hetulae, L. {R. betuJeti, F.), 

 R. coeruleus, Deg., and Sciaphobus squalid us, Gyll. [see also this Review, 

 Series A, i, p. 438, ii, p. 337 and iii, p. 533]. 



Shtcherbakov (Th. S.). riepcneKTMBbi MsyHeHin KJiesepa ci» tohkm 



SptHifl onblTHO-OHTOMOnorMHeCKOM. [The possible results of 

 studies of clover from an experimental-entomological point of 

 view.] The Shatilov Agricultural Experimental Station of the 

 Department of Agriculture, Kiev, 1915, 25 pp. 



This is a paper read at the Conference on pests of clover, convened 

 by the Zemstvo of the Government of Tula on the 9th April 1915. 

 The author deals with the subject much on the same lines, although 

 more elaborately, than in his previous paper [see this Revieiv, Series A, 

 iii, p. 641] and concludes that the injury done by Apian is so small 

 as to be negligible. The decrease in the crop of clover, which frequently 

 leads to the abandonment of its cultivation, is not due to injury by 

 Apian spp. nor to the scarcity of natural pollenisers, such as humble 

 bees, but to chemical processes in the soil and biological phenomena 

 in the plant itself, to which further investigation must be directed. 



DoBRovLTANSKY (V. V.). CoBpeMeHHoe no/ioweHie Bonpoca o cpeA- 

 CTBaxii A^fl MCTpe6/ieHifl BpeAHbix-b HactKOMbix'b bi cbasm cb 



yCJIOBiflMM TeKyiMaro MOMeHia. [The present position of the 

 question of means for the control of insects in connection with 

 the conditions of the moment.] — «X03flilCTB0.» [Husbandry], 

 Kiev, xi, no. 3-4, 11th February 1916, pp. 42-51. 



The author reviews the various substances in use for the control of 

 insect pests, which he divides into contact and stomach insecticides, 

 the first being used mostly against sucking and the second against 

 gnawing insects. For many years, Paris green, which is almost 

 exclusively manufactured in Germany, has been used as the chief 

 stomach insecticide, but its many disadvantages have produced 

 attempts to find some substitute for it. Owing to the war, the 

 importation of Paris green into Eussia has ceased, and the moment 

 is considered opportune to replace it by other insecticides, which can 

 be manufactured in Russia, such as barium chloride, lead chromate, 

 sodium arsenite and arsenate, lead arsenate or gypsin (this name 

 being derived from the English word gipsy-moth), and lime arsenite 

 and arsenate. Of these, arsenite of lime is regarded as the most 

 suitable for use against orchard pests. At the Kiev station it is 

 prepared as follows : — 1 lb. of white arsenic and 2 lb. of soda are boiled 



