﻿699 
  

  

  by 
  both 
  adult 
  and 
  larva. 
  When 
  the 
  temperature 
  rises 
  at 
  the 
  end 
  of 
  

   winter, 
  the 
  females 
  oviposit 
  in 
  sinuous 
  galleries 
  in 
  old 
  or 
  sickly 
  

   trees 
  and 
  in 
  withered 
  branches. 
  The 
  larva 
  bores 
  a 
  new 
  gallery 
  

   between 
  the 
  wood 
  and 
  the 
  bark, 
  w^ith 
  ramifications 
  at 
  right 
  angles 
  

   to 
  it. 
  The 
  adult 
  emerges 
  by 
  piercing 
  the 
  bark 
  and 
  attacks 
  the 
  

   branches 
  in 
  blossom. 
  In 
  about 
  a 
  fortnight, 
  between 
  May 
  and 
  the 
  

   end 
  of 
  June, 
  the 
  eggs 
  of 
  the 
  second 
  generation 
  are 
  laid, 
  some- 
  

   times 
  on 
  healthy 
  branches. 
  The 
  second 
  generation 
  is 
  more 
  nume- 
  

   rous 
  and 
  injures 
  the 
  year's 
  crop 
  of 
  olives 
  by 
  attacking 
  the 
  fruit- 
  

   branches. 
  To 
  control 
  Phloeotribus, 
  pruning 
  about 
  once 
  a 
  year 
  is 
  

   advisable, 
  the 
  debris 
  being 
  stacked 
  in 
  heaps 
  until 
  the 
  end 
  of 
  April, 
  when 
  

   it 
  should 
  be 
  burned, 
  together 
  with 
  the 
  eggs 
  which 
  this 
  Scolytid 
  will 
  

   have 
  deposited 
  on 
  it. 
  Branches, 
  etc., 
  which 
  have 
  been 
  stored 
  for 
  

   firewood 
  should 
  also 
  be 
  destroyed 
  not 
  later 
  than 
  mid-July. 
  Where 
  

   infestation 
  is 
  severe, 
  the 
  branches 
  may 
  be 
  sprayed 
  with 
  a 
  1 
  per 
  cent, 
  

   solution 
  of 
  lead 
  arsenate 
  in 
  February 
  and 
  May 
  — 
  i.e., 
  before 
  oviposition 
  

   takes 
  place. 
  Timely 
  control 
  oiPhloeotrihus 
  also 
  checks 
  a 
  smaller 
  allied 
  

   borer, 
  •which 
  has 
  done 
  enormous 
  damage 
  in 
  Liguria 
  in 
  the 
  last 
  few 
  

   years. 
  

  

  NedRIGAILOV 
  (N. 
  0.). 
  6opb6t 
  CT> 
  MyHHMCTOM 
  6ont3Hbio 
  KpblWOB- 
  

   HHKa 
  M 
  JIMMMHKOH 
  xpyiua. 
  [On 
  fighting 
  Spherotheca 
  and 
  larvae 
  

   of 
  Melolontha.] 
  — 
  « 
  nnOflOBOflCTBO.» 
  [Horticulture], 
  Petrograd, 
  

   no. 
  8, 
  August 
  1914, 
  pp. 
  552-554. 
  

  

  Endeavours 
  to 
  fight 
  the 
  larvae 
  of 
  Melolontha 
  by 
  means 
  of 
  carbon 
  

   bisulphide 
  more 
  or 
  less 
  failed, 
  as 
  it 
  was 
  necessary 
  to 
  inject 
  it 
  into 
  the 
  

   soil 
  almost 
  every 
  week, 
  and 
  it 
  was 
  found 
  to 
  scorch 
  the 
  roots 
  of 
  the 
  

   plants. 
  In 
  that 
  district 
  of 
  the 
  government 
  of 
  Poltava 
  in 
  which 
  the 
  

   orchards 
  investigated 
  are 
  situated, 
  these 
  pests 
  have 
  destroyed 
  in 
  one 
  

   year 
  some 
  40 
  acres 
  of 
  plantations. 
  It 
  was 
  found 
  by 
  experiment 
  that 
  

   the 
  larvae 
  cannot 
  move 
  about 
  readily 
  in 
  hard 
  clay 
  or 
  in 
  wet 
  soil, 
  and 
  

   the 
  soil 
  most 
  suitable 
  to 
  the 
  larvae 
  is 
  loose 
  dry 
  earth. 
  It 
  was 
  also 
  

   observed 
  that 
  in 
  places 
  shaded 
  by 
  large 
  trees, 
  where 
  the 
  earth 
  retains 
  

   its 
  moisture, 
  only 
  few 
  larvae 
  were 
  present. 
  The 
  planting 
  of 
  young 
  

   apple 
  trees 
  in 
  the 
  shade 
  of 
  five-year-old 
  acacia 
  trees 
  has 
  had 
  satisfactory 
  

   results, 
  and 
  in 
  a 
  few 
  years 
  it 
  will 
  be 
  possible 
  to 
  remove 
  the 
  acacias, 
  

   as 
  the 
  apple-trees 
  will 
  then 
  be 
  big 
  enough 
  to 
  provide 
  the 
  necessary 
  

   shade 
  themselves. 
  Planting 
  at 
  the 
  bottom 
  of 
  pits 
  3 
  feet 
  or 
  more 
  

   deep, 
  the 
  walls 
  of 
  which 
  afforded 
  shade 
  and 
  which 
  could 
  be 
  flooded 
  

   with 
  water 
  was 
  also 
  effective 
  in 
  keeping 
  away 
  the 
  larvae. 
  

  

  VosTRiKov 
  (P.). 
  OnbiTTj 
  npwivitHeHifl 
  MbiiubflKOBMCTO-KMcnaro 
  Haipa 
  

   BTj 
  6opb6"fe 
  C"b 
  capaHMeti. 
  [An 
  experiment 
  on 
  the 
  apphcation 
  

   of 
  sodium 
  arsenite 
  in 
  the 
  fight 
  against 
  Locusta 
  migratoria.] 
  — 
  

   «Cafl"b, 
  OropOA"b 
  M 
  BaXMa.» 
  [Orchard, 
  Market-Garden 
  and 
  

   Bachza], 
  Astrachan, 
  no. 
  8, 
  August 
  1914, 
  pp. 
  518-519. 
  

  

  The 
  results 
  of 
  the 
  campaign 
  against 
  Locusta 
  (Pachytylus) 
  migratoria 
  

   in 
  the 
  delta 
  of 
  the 
  Volga, 
  organised 
  by 
  the 
  Astrachan 
  Board 
  of 
  Agri- 
  

   culture, 
  are 
  given. 
  At 
  first 
  the 
  only 
  measure 
  adopted 
  was 
  spraying 
  

   with 
  Paris 
  green, 
  but 
  in 
  the 
  middle 
  of 
  June, 
  when 
  the 
  locusts 
  

   were 
  in 
  their 
  third 
  stage, 
  , 
  a 
  sodium 
  arsenite 
  mixture, 
  consisting 
  of 
  

  

  