214 



OtmbtI} AtflTejibHOCTH PMwcKaro OiAtna MMneparopKaro OOiMecTBa 

 CaAOBOflCTBa sa 1913 rOA'b. [Report on the work of the Riga 

 branch of the Imperial Russian Society of Horticulture for 1913.], 

 « BtcTHMKii CaAOBOACTBa, rinoAOBOACTBa h OropoAHii4ecTBa.» 



[Messenger of Horticulture, Fruit-growing and Market-gardening], 

 Petrograd, 1914, no. 8-9, pp. 716-742. 



In the orchard on the farm of Bilderhngshof belonging to the 

 Society, the following insect pests were noticed in 1913 : — Anthonomus 

 fomorum, L., Hemerophila [CJwreutis) pariana, CI., Cydia (Carpocapsa) 

 pomonella, L., Recurvaria {Gelechia) nanella, Hb., Psylla pyricola, 

 Forst., Apihis pruni and Lepidosaphes ulmi, {Mytilaspis pomorum, 

 Bouche). The caterpillars of H. pariana of the second generation 

 were specially injurious, as many as seven specimens being found 

 on one leaf. Trap belts of wood-wool, mats, straw and felt 

 were put on the trees against C. poynonella, the felt apparently 

 capturing the largest number of caterpillars . A . pomorum was observed 

 in small numbers. Against Psylla pyricola, which appeared at the 

 approach of autumn in great quantities, repeated spraying with 6 per 

 cent, of iron sulphate during the dropping of the leaves w^as applied 

 and the pests were totally destroyed ; one spraying proved insufficient. 

 The destruction of aphids on plum trees was effected by one spraying 

 with a solution of quassia. The trunks affected by Lepidosaphes 

 were washed in spring with a 10 per cent, solution of iron sulphate, 

 which, however, did not kill all the insects. 



PoLovNiKov (P.). HtcKOJibKO cnoBit wtpaxTj 6opb6bi ctj xpyiueMTo. 



[Some words on the methods of controlling cockchafers.] — 

 « Jl'feCHOM }HypHan"b.» [Forestry Jo^irnal], Petrograd, xliv, 

 no. 2, 1914, pp. 213-216. 



The usual remedies against Melolontha are hand collection, clean 

 cultivation, ploughing at the end of the summer in the year when 

 the adults are numerous, breaking up the soil between the rows of 

 trees, and clearing rides 350 feet wide. These remedies are examined 

 and their disadvantages considered. It is pointed out that hand 

 collection is very difficult in older plantations and only effective if 

 applied everywhere ; cultivation, ploughing, and breaking up the 

 soil require the preliminary removal of the stumps which is not always 

 possible in extensive forests. The evil will be aggravated if the 

 breaking up of the soil is discontinued, as is shown by observations on 

 10 or 11-year-old plantations in the Selishtchensk and Kozhnov 

 forests, which are heavily infested with the larvae of Melolontha. 

 The effectiveness of rides or cuttings, 350 feet wide, is denied. 



Balabanov (M.). none3HO-/iH btj caAaxii MSBecTKOBoe onpbiCKHBaHie? 



[Is hme-spraying in orchards useful?] — « CaAOBOAl*.)) [The 

 Horticulturist], Rostov-on-Don, no. 1, January 1915, pp. 14-16. 



The beneficial results of spraying with lime early in spring, before 

 the leaves appear, against various fungous diseases and insect pests are 

 described. Against larvae of Psylla mali, adding green soap to the 

 lime solution in the proportion of 1 lb. of soap to 24 gallons of the 

 solution is advised, and the spraying should be made as soon as the 



