700 



Algeria, suggests passing the bacillus directly from dead insects of one 

 series into those of another without any intermediate cultivation of 

 fluid on agar-agar. In this way, there is no danger of losing the virus, 

 which may happen when using the method of d'Herelle, and at the 

 same time its virulence is increased. 



Dychov (N.). Kap6onoBafl KucnoTa npoTMBij iweAnHMi^bi. [Carbolic 

 acid against Psylla.] — ^«Cafl"b, OropOAT* V\ BaXHa.» [Orchard, 

 Market-Garden and Bachza], Astrachan, no. 5. May 1915, pp. 192- 

 194. [Eeceived 27th September 1915.] 



For the control of Psijlla, spraying with a solution of carbolic acid, 

 prepared as follows is recommended : — 3 lb. of green soap are dissolved 

 in about 3 gallons of warm water, after which about li- gallons of 

 black carbolic acid are added and the whole diluted with from 40 to 45 

 gallons of cold water. This insecticide provides the most effective 

 and cheapest remedy for the destruction of the eggs of this pest, and 

 does not injure the bark of the trees. During the successful application 

 of this remedy in some orchards of the district of Kurmysh in 1914, it 

 was observed that apple scab has diminished in comparison with the 

 orchards where no carbolic acid was sprayed, and that lichen and moss 

 were also destroyed. 



Prochorov (J.). 6opb6t C"b BpeflMieJlflMM. [On the control of 

 pests.]- «Cafl'b, OropOfl"b M BaX4a.» [Orchard, Market-Garden 

 and Bachza], Aslrachan, no. 8, August 1915, pp. 366-368. 



Against Aphids, Psylla mail and Hyponomeuta malinellus, spraying 

 with an arsenical tobacco liquid has been successful. This is prepared 

 by boiling a given quantity of tobacco dust in a boiler for 2, 3 or 5 

 hours and, after the decoction has cooled down and been strained, 

 diluting it with water in the proportion of about 5 gallons of water 

 for each 1 lb. of the tobacco used, and adding a solution of arsenic 

 made by boiling 1 lb. of arsenic in about 5 gallons of water, such that 

 each 27 gallons of the liquid for use should contain 11 oz. of arsenic. 



Sacharov (N.). Ktj noflBJieHiw nyroBoro MOTbinbKa btj HepHOflpcKOMi, 

 ytsflt M Bii OKpecTHOCTflx-b BjiaAMMipoBKM, l4apeBCKaro ytsAa. 



[On the appearance oiPldiictaenodes sticlicalis, L., in the Tcherny- 

 Yar district and near Vladimirovka, in the Zarev district.] — 

 «Cafl"b, OropOfl"b M BaXMa.» [Orchard, Market-Garden and 

 Bachza], Astrachan, no. 8, August 1915, pp. '373-380. 



This is a report to the Zemstvo of the government of Astrachan 

 on investigations into the outbreak of Phlyctaenodes sticticalis which 

 occurred in 1915. The chief damage was done to mustard and bachza 

 crops ; melons and pumpkins were not touched. No damage was 

 done to orchards and market- gardens ; some grain crops were uninjured 

 and only young seedlings of sorghum and maize were more or less 

 seriously damaged ; at the same time the caterpillars destroyed all 

 the weeds in the fields invaded by them and also devoured leaves of 

 rye and wheat, without, however, causing any serious damage to these 

 crops. The caterpillars mainly pupate in friable soil, mostly in soil 

 under cultivation, mustard and bachza fields being the most infested. 



