345 



October it mounts to the upper part of the joint and pupates in a 

 cocoon, transforming into the adult in December. The latter emerges 

 in January or February. R. latisternus is comparatively rare, but 

 when it occurs the injury is severe and renders the infested bamboos 

 quite useless. To check it all infested canes should be cut off in April 

 and May and exposed to the sunshine in order to kill the larvae. The 

 giant bamboo is not attacked. 



L.P.T. Os Insectos Damninhos. xiv. Defesa contro o Gryllotalpa. 

 [Measures against the Mole-cricket. "i — Chacaras e Quintaes, S. 

 Paulo, xxiii, no. 4, 15th April 1921, p.' 292, 1 fig. 



A peculiar but effective method of protecting tender young plants 

 against Gryllotalpa ietradactyla, Per., consists in wrapping their stems 

 with leathery leaves, such as those of Mammea americana. A leaf is 

 split along its midrib, and each half is wrapped round the stem, 

 half the cylinder thus formed being below the level of the soil. 



Bogdanov-Katkov (N. N.). QHepK Bo3HMKHOBeHMfl, OpraHMsauMM 

 M /leflTe/ibHOCTM rioAOTAena Eopb6bi c BpeAnre/iflMM sa nepebie 

 9 Mecfluee ero CyujiecTBOBaHMfl. flpeAnojioweHiiA Ha 1919 rofl. 



[Outline of the Origin, Organisation and Function of the Sub- 

 Section for the Control of Plant Pests during the first Nine Months 

 of its Existence. Plans for 1919.] — MaeeCTMfl flOAOTAeJia 



EopbObi c BpeAMTe/iflMM npn nerporpaACKOM KoMMTere no 



Ce/lbCKOMy XoSflMCTOy [Bull. Sub-Section Control Plant Pests 

 attached to the Petrograd Committee of Rural Economv], Petro- 

 grad, i, April 1919, pp. vii-lv,14 figs. [Received 13th May 1921.] 



The sub-section for the control of plant pests was inaugurated at 

 the beginning of 1918, and its work for that year, as well as the intended 

 programme for 1919, is reviewed. The functions of the department 

 include the systematic organisation of campaigns and investiga- 

 tions into the life-history of various insect pests occurring in the 

 neighbourhood of Petrograd. 



During 1918 Enxoa [Agrotis) segetum was particularly injurious to 

 freshly planted cabbages and other vegetables. 



Reichardt (A. N<^. KanyCTHafl MoJlb {Plufella ^nacuUpennis. 

 Curt.). — MaeecTMn floAOTAe/ia Bopb6bi c BpeAMTejiflMM npw 

 neiporpaACKOM KoMMTeie no CejibCKOMy XoaflMCToy [Bull. 

 Sub-Section Control Plant Pests attached to the Petrograd Com- 

 mittee of Rural Economy'], Petrograd, i, April 1919, pp. 6-77, 

 15 figs. [Received 13th May, 1921.] 



The literature of the Tineid moth, Plutella maculipennis, Curt. 

 {cruciferarum, Z.) is reviewed. During 1918 investigations into the 

 life-history of this pest in the vicinity of Petrograd were undertaken, 

 the results of which are here described. The food-plants include 

 many wild and cultivated cruciferous plants, but beetroot is 

 apparently generally preferred for oviposition, though the injury to 

 this crop is less than to cabbages owing to its greater resistance. 

 Besides crucifers it has also been found attacking Snlsola kali 

 (Chenopodiaceae) and Cicer arietinus (Papilionaceae). The eggs are 

 laid singly or in groups of from 2 to 5 on the lower surface of the leaves. 



V 



