297 



are laid in fields covered with weeds and that by breaking up the soil 

 their development may be checked. On one estate, instead of using 

 poisoned potato-baits, potatoes were planted and the harvesting of 

 these cleared the field of the larvae. N. M. Kulagin reported that, 

 according to experiments carried out in the Government of Moscow by 

 A. F. Baranov, the larvae perished quickly in dry basic slag, but 

 survived for a long time if it was wet. Several speakers suggested 

 the application of scientific methods of field cultivation, including 

 proper rotation of crops, as adopted in Canada, and this view was 

 accepted by the Conference, which also agreed with the author's con- 

 clusions as to the desirability of further investigations on this pest. 



TcHiKov (P. v.). KpaiKoe pyKOBOflCTBo no Kynbiypt laSaKa npMMt- 

 HMienbHO AHfl CyxyMCKaro Onpyra. [A short guide to the cultiva- 

 tion of tobacco in the district of Suchum.] — •« HsB'tCTifl Cyxywi- 

 CKOH CaAOBOM H CenbCKOxosflwcTBeHHoii OnuTHOH CTaHuiH.» 



[Bulletins of the Suchum Horticultural and Agricultural Experi- 

 ment Station], Suchum, no. 20, 1915, 16 pp. [Received 

 10th May 1916.] 



The insect pests of tobacco recorded in the district of Suchum 

 include Gryllotalpa, which injures the roots and can be controlled by 

 means of poisoned maize baits (1 lb. of arsenic and 6 lb. of maize). 

 The tobacco thrips, of which there are three generations during the 

 summer and which is particularly abundant during droughts, should 

 be controlled with sprays of tobacco extract. The caterpillars of 

 Euxoa segetum also attack tobacco, injuring young roots and stems ; 

 early ploughing, destruction of weeds and handpicking are the remedies 

 suggested. 



Umnov (A.). BparM cenbCKaro xosniicTBa msii Mipa HactKOMbixij. 



[Insect-enemies of agriculture.] — « Hauje Xo3flMCTBO.» [Our 

 Husbandry], Eletz {govt, of Orel), no. 5-6, 13th April 1916, 

 pp. 15-20. 



This article, evidently the first of a series, gives a short and popular 

 account of the biology of wire-worms, with particular reference to 

 Agriotes lineatus, L., and Athous niger,Jj. The author deals with the 

 subject much on the same lines as in a previous paper [see this Revieiv, 

 Series A, ii, p. 263]. 



Anutchin (A.). Typei4Kiil CKOCapb. [Otiorrhynchus turca, Bohem.] 

 — « CaAOBOA'b.» [The Horticulturist], Rostov-on-Don, no. 4, 

 April 1916, pp. 201-202. 



Otiorrhynchus turca, Boh., is a serious pest of the vine, devouring 

 the buds in spring and later the leaves, while the larvae injure the roots. 

 No males have yet been found, the females o\'ipositing partheno- 

 genetically. The eggs are laid in the soil, where the larvae live and 

 pupate. Beetles emerging from the pupae are able to oviposit the 

 same summer ; some of the eggs winter, others give rise to larvae of 

 which some also remain over the winter, pupating next spring ; some 

 of the weevils also hibernate. Thus all stages of this pest may be found 



(C275) D 



