20 



Simon (Th. P.). Hylobius abietis m wtpbl 6opb6bl Cb HMMT», no Ha6niO- 

 AeHiflMl} 1913-14 rr. BT> OpJlOBCKOil r. [Hylobius abietis and 

 remedies against it, according to observations in the govt, of 

 Orel in 1913-14.]— ttJltCHOM }KypHan"b.» [Forestry Journal}, 

 Petrograd, 1915, nos. 6-7, pp. 1080-1085. 



The usual remedy recommended for the control of Hylobius abietis. 

 viz., the grubbing of the clearings, although useful in many respects, 

 is expensive and only effective if applied the next winter after the 

 clearings are made. The author's observations have satisfied him 

 that the barking of the stumps is more satisfactory ; over 10,000 larvae 

 were collected from 492 stumps, which had not been barked, while 

 in a neighbouring plot, containing 481 stumps, of which all but 98 

 had been barked the winter before, only 1,239 larvae were found and 

 these only in the unbarked stumps. The barking of pines round the 

 base before felling is therefore advocated. Clearings should not be 

 replanted for three years. 



FoLMER (Iv.). TpHncb npoBOM nmeHMUbi m Mtpbi 6opb6bi Cb hmmij. 



[Thrips of spring-sown wheat and its control.] — « 3eMJie/l'bJieL]l'b.» 

 [The Agriculturist^ Petrograd, xx, no. 9, September 1915, 

 pp. 396-398. 



Remedies given for thrips in winter- sown wheat, include the 

 burning of the stubbles, in which, as well as in the soil, the larvae 

 winter. The early scarifying of the soil, thus increasing the amount of 

 moisture, favours the development of the disease caused by the fungus, 

 Botrytis bassiana. The early sowing of summer wheat,' preferably on 

 clay and black soil, on which potatoes, beetroots, carrots, sunflowers 

 or maize have been previously grown, is also advised. 



Troitzky (D.). MscjitfloeaHie meeMHcJjypTCKOii seneHM. [Analysis 

 of Paris Green.] — « 3eMnefl"bnbMeCKafl faseia.)) [Agricultural 

 Gazette], Petrograd, no. 31, 14th August 1915, pp. 870-871. 

 [Received 8th November 1915.] ^ 



The author calls attention to adulterations of Paris green, which are 

 facilitated in many cases by the methods of analysis usually adopted. 

 Paris green being a double copper salt of acetic and arsenious acid, 

 the analysis must prove the presence both of about from 55 to 61 per 

 cent, of arsenious anhydride and of from 27 to 31 per cent, of copper 

 oxide ; the amount of free arsenic should not exceed about 2 per cent. 



Kypcbi no MHKonoriM, (t)iiTonaTOJioriii ti npuK/iaAHoii sHTOMOJioriM. 



[Courses on mycology, phytopathology and applied entomology.} 

 « SeMliefl'bnbHeCKafl ra3eTa.» [Agricultural Gazette], Petrograd^ 

 no. 35, nth September 1915, p. 987. 



It is announced that, as in previous years, the courses of lectures on 

 phytopathology, mycology and applied entomology will be held in. 

 1916 at Petrograd at the Bureau of Mycolog}^ and Phytopathology 

 for agricultural instructors. 



