381 



walled in with bricks, the chimney being preferably situated between 

 them ; each tank is provided with an iron pipe with a wooden tap near 

 the bottom. About 6-8 lb. of ashes are put in each tank with about 

 55 lb. of tobacco leaves and the tanks are then filled with water. It is 

 better to have a separate furnace for each tank. Heating is continued 

 till the water boils, when the tanks are closed and the contents left till 

 next day. About 35-40 gallons of extract are obtained from each 

 tank, but for actual use it is diluted with two parts of water. Of this 

 solution each apple or pear tree requires about from li- to 3 gallons, 

 at a cost of about Id. per tree. This insecticide is rendered more 

 effective by adding a tumblerful of creoline to every 110-153 gallons 

 of the solution. 



Sevastianov (I. A.). Bopb6a C"b mpobhhom ineii. [The control of 

 the woolly-aphis.] — «CaflOBOA'b.» [The Horticulturist], Rostov- 

 on-Don, XV, no. 6, June 1916, pp. 279-289, 9 figs. 



This paper deals with the control of Eriosoma lanigerum much on the 

 same hues as in a previous one [see this Review, Ser. A, ii, p. 75-77]. 

 When there are no leaves on the trees, a soap-oil and a soda-oil emulsion 

 can be apphed, either by way of spraying or smearing. To prepare 

 the emulsion for spraying purposes, \-\ lb. of soda is dissolved in 

 a small quantity of water, and |-1 lb. of cotton-seed-, hnseed-, 

 hempseed-, or any other similar oil is added and the whole stirred with 

 a bunch of twigs, water being added to bring the total volume to 

 3 gallons. The spraying must be done in autumn and the oily coating 

 produced will protect the branches from becoming infested with this 

 Aphid for two or three months. For smearing the trees, kerosene and 

 cotton-seed or any similar oil are mixed in equal parts. 



Savtohenko (I.). M3T» MenMTonojibCKaro ytsfla. [From the district 

 of Mehtopol (govt, of Taurida).]— « CaAOBOfl"b.» [The Horticul- 

 turist], Rostov-on-Don, xv, no. 6, June 1916, pp. 334-335. 



Paris green (1| oz. with quick lime, 4| oz., in 27 gals, of water) was 

 apphed with success against Cydia pomonella in the spring. Owing to 

 the increased price of tobacco, quassia emulsion was used against 

 Aphids, prepared by boihng 4 lb. of quassia for about two hours in 

 8| or 9 gals, of water ; the decoction is left over night to settle and is 

 then filtered ; 3 lb. of soft soap dissolved in hot water are then added 

 and water to make up a total bulk of 27-30 gals. 



Ermakov (Prof. V. P.). B/iiflHie smmmmxt* Mopo30BT» Ha pacieHifl. 



[The influence of winter-frosts on plants.] — «CaAOBOA'b.» [The 

 Horticulturist], Rosto-on-Don, xv, no. 7, July, pp. 343-346, 



This is a reiteration of a statement contained in a previous article 

 [see this Review, Ser. A, iii, p. 486] that the injury to plants usually 

 attributed to the effect of frosts is really caused by ants. In addition 

 to bone-meal, manuring with superphosphate or basic slag tends to 

 destroy these insects. 



