﻿173 
  

  

  after 
  the 
  land 
  has 
  been 
  scarified, 
  is 
  ineffective 
  ; 
  he 
  gives 
  a 
  table 
  summa- 
  

   rising 
  the 
  results 
  of 
  some 
  experiments 
  conducted 
  at 
  the 
  Station 
  in 
  

   Poltava 
  in 
  1912, 
  from 
  which 
  it 
  appears 
  that 
  after 
  the 
  harrowing 
  has 
  

   been 
  thrice 
  repeated 
  only 
  b^ 
  per 
  cent, 
  of 
  the 
  stubble 
  has 
  been 
  thrown 
  

   out. 
  As 
  to 
  the 
  burning, 
  the 
  author 
  is 
  of 
  opinion 
  that 
  this 
  remedy 
  can 
  

   be 
  apphed 
  on 
  winter-sown 
  fields, 
  especially 
  when 
  this 
  is 
  done 
  early 
  in 
  

   July 
  and 
  in 
  dry 
  years. 
  He 
  does 
  not 
  think 
  that 
  an 
  earlier 
  harvest 
  can 
  

   be 
  considered 
  a 
  remedy, 
  as 
  the 
  insects 
  usually 
  leave 
  the 
  crops 
  much 
  

   before 
  they 
  can 
  be 
  harvested. 
  The 
  deep 
  ploughing 
  of 
  the 
  stubble 
  

   seems 
  to 
  be 
  the 
  best 
  remedy, 
  as 
  is 
  shown 
  by 
  some 
  experiments 
  at 
  the 
  

   Station, 
  which, 
  however, 
  are 
  not 
  quite 
  completed. 
  Isosoma 
  noxiahy 
  

   Portch., 
  in 
  some 
  years 
  attacks 
  up 
  to 
  80 
  per 
  cent, 
  of 
  the 
  stems, 
  although 
  

   the 
  actual 
  damage 
  is 
  less 
  than 
  it 
  appears, 
  as 
  it 
  has 
  been 
  shown 
  by 
  some 
  

   experiments 
  at 
  the 
  Poltava 
  Station 
  that 
  the 
  loss 
  to 
  the 
  w^eight 
  of 
  

   grain 
  in 
  the 
  attacked 
  stem 
  is 
  10 
  per 
  cent, 
  and 
  less. 
  This 
  species 
  has 
  

   only 
  one 
  generation, 
  the 
  larvae 
  remaining 
  over 
  the 
  winter 
  inside 
  the 
  

   stems, 
  so 
  that 
  the 
  greater 
  part 
  of 
  them 
  is 
  taken 
  home 
  after 
  the 
  harvest 
  ; 
  

   the 
  thrashing 
  of 
  the 
  crops 
  does 
  not 
  usually 
  destroy 
  the 
  insects, 
  unless 
  

   a 
  straw-press 
  is 
  used, 
  and 
  the 
  author 
  recommends 
  using 
  the 
  straw 
  of 
  

   winter 
  w^heat 
  as 
  fuel 
  or 
  as 
  htter 
  during 
  the 
  winter 
  months 
  ; 
  where 
  

   long 
  stubble 
  is 
  left 
  in 
  the 
  fields 
  it 
  should 
  be 
  burned 
  off. 
  Isosoma 
  

   tritici, 
  Fitch 
  (Isosoma 
  hordei, 
  Harr.), 
  is 
  very 
  injurious 
  in 
  the 
  govern- 
  

   ments 
  of 
  Cherson 
  and 
  Ekaterinoslav. 
  

  

  The 
  descriptions 
  of 
  most 
  of 
  the 
  pests 
  given 
  in 
  the 
  book 
  are 
  accom- 
  

   panied 
  by 
  figures 
  of 
  their 
  various 
  stages, 
  plants 
  injured 
  by 
  them, 
  etc. 
  

   A 
  supplement 
  deals 
  with 
  the 
  Tarsonemid 
  mite, 
  Pedicuhpsis 
  graminum, 
  

   E. 
  Renter. 
  The 
  work 
  constitutes 
  a 
  most 
  useful 
  book 
  of 
  reference 
  on 
  the 
  

   subject. 
  

  

  De 
  Castro 
  Sobrinho 
  (A. 
  R.). 
  A 
  Batata 
  Inglesa 
  e 
  a 
  sua 
  Cultura. 
  

  

  [The 
  English 
  Potato 
  and 
  its 
  Cultivation.] 
  — 
  Boletim 
  do 
  Minis, 
  da 
  

   Agric. 
  Indust. 
  e 
  Comm., 
  Servico 
  de 
  Informacdes 
  e 
  Divulgacdo, 
  Rio 
  

   de 
  Janeiro, 
  1913, 
  i, 
  no. 
  5 
  (Nov.-Dec. 
  1912), 
  1913, 
  pp! 
  74-83. 
  

   [Received 
  16th 
  Jan. 
  1914.] 
  

  

  In 
  this 
  pamphlet, 
  w^hich 
  deals 
  with 
  the 
  general 
  cultivation 
  of 
  the 
  

   potato 
  in 
  Brazil, 
  the 
  author 
  says 
  that 
  the 
  following 
  insect 
  pests 
  of 
  the 
  

   plant 
  are 
  known 
  : 
  — 
  The 
  potato 
  beetle 
  {Leptinotarsa 
  decemlineata), 
  

   which 
  can 
  be 
  kept 
  down 
  by 
  copper 
  sulphate 
  sprays 
  ; 
  a 
  hawk-moth 
  

   (Acherontia 
  atropos), 
  the 
  larva 
  of 
  which 
  is 
  one 
  of 
  the 
  worst 
  enemies 
  of 
  

   the 
  potato 
  and 
  other 
  Solanaceae 
  ; 
  '^ 
  Noctua 
  solani, 
  Fab.," 
  the 
  larva 
  of 
  

   which 
  is 
  known 
  as 
  " 
  bicho 
  pardo 
  " 
  and 
  devours 
  the 
  lower 
  parts 
  of 
  the 
  

   plant 
  ; 
  and 
  an 
  aphis, 
  which 
  may 
  be 
  destroyed 
  by 
  dusting 
  with 
  hme 
  

   or 
  plaster 
  of 
  Paris. 
  

  

  BoNDAR 
  (G.). 
  Brocas 
  das 
  Laranjeiras 
  e 
  outras 
  Auranciaceas. 
  [Borers 
  

   of 
  orange 
  trees 
  and 
  other 
  Aurantiaceae.] 
  — 
  Boletim 
  do 
  Minist. 
  da 
  

   Agric. 
  Indust. 
  e 
  Comm., 
  Servico 
  de 
  Informacdes 
  e 
  Divulgagdo, 
  Rio 
  

   de 
  Janeiro, 
  ii, 
  no. 
  3, 
  May- 
  July 
  1913, 
  pp. 
  81-93, 
  15 
  figs. 
  

  

  The 
  author 
  says 
  that 
  the 
  most 
  important 
  citrus 
  borers 
  in 
  Brazil 
  

   are 
  Acrocinus 
  accentifer, 
  Diploschema 
  rotundicolle 
  and 
  Cratosomus 
  

   reidi. 
  In 
  addition 
  to 
  these, 
  C. 
  Moreira 
  has 
  met 
  with 
  a 
  Cerambycid, 
  

   Rhopalophora 
  collaris. 
  Germ., 
  and 
  H. 
  von 
  Ihering 
  records 
  Trachyderes 
  

  

  