547 

 PucHov (B. A). BpeflHbie KoSbinKM m BopbSa c hmmm OTpaBneHHbiMM 



npHMaHKHMM. [Injurious Locusts and their Control by Poison 



Baits.] neiporpaflCKafl CraHUHfl Sammbi PacieHMM ot BpeAmeneM, 



[Petrograd Sta. Protect. Plants from Pests], Petrograd, 1922, 13 pp. 



The superiority of poison baits over other methods for the control 

 of locusts in Siberia and the Cis-Ural district has been generally 

 demonstrated. Either Paris green or sodium arsenite were the poisons 

 used, mixed with wood shavings, sawdust or fresh horse manure. This 

 paper describes the method of preparing the baits and their distribution. 

 Thorough mixing of the poison and judicious application are essential 

 in order to obtain the maximum efficiency. 



SviRiDEXKo (P. A.). TaQnuua aha onpeflejieHun eoapacTOB jimmmhok 

 MapOKKCKOil K06binKM. [Tables for the Determination of the various 

 Stages of the Larvae of Dociostauriis maroccanus, Thunb.j — 

 HapoAHbiH KoMMCcapMar 3eiviJieAenMfl , Eropo Eopb6bi c BpeAMTejiflMM 



CenbCKOro XoSflPiCTBa. [Xcitional Cojnmissariat of Agriculture, 

 Bur. Control Agrw. Pests], Tiflis, 1922, 6 pp. 



Unlike those of other locusts, the various larval stages of Dociostaurus 

 {Stauronotus) maroccanus, Thunb., are not easily identified by their 

 colouring ; these tables are therefore given to facilitate their recognition. 



GiROLA (C. D.). Fruticultura Argentina. VI. — Anales Soc. Rural 

 Argentina, Buenos Aires, Ivi, no. 13, 1st July 1922, pp. 345-355, 

 7 figs. 



In Argentina the pests most commonly occurring on the fruits of 

 Citrus are the Coccids, Lepidosaphes beckii, Newm., Chrysomphalns 

 aonidum, L., C. dictyospermi, Morg., CJiionaspis 'citri, Comst., and 

 Mesolecanium deltae, Liz. The treatment recommended against these 

 is an emulsion of 2 or 3 parts kerosene in 100 parts of water, 

 with the addition of soap ; or fumigation with h3'drocyanic acid gas 

 after covering the plants with impermeable tents. Pests found 

 especially on oranges are the Longicorn beetle, Mallodon spinibarbis, L., 

 and the caterpillars of Papilio tJwas thoantiades, Burm. 



Report oJ the Entomological Division. [1921.] — Trop. Agric, 

 Peradeniva, Iviii, no. 4, April 1922, pp. 216-219. [Received 

 2nd September 1922.] 



The suggested manurial experiments to test the efficacy of nitrogen, 

 potash, or phosphoric acid on the incidence of Xyleborus fornicatus 

 (shot-hole borer) [R.A.E., A, ix, 217] are in progress. While the 

 results are not yet conclusive, it seems as though nitrogenous manures 

 do, to a small extent, assist the bushes to withstand borer attack. 

 The information concerning pests of the 3'ear has largely been noticed 

 from other sources. The report of the plant-pest and disease inspector 

 contains a list of the commoner pests of tea and of miscellaneous 

 plants. 



