﻿335 
  

  

  portion 
  of 
  a 
  second 
  were 
  produced 
  during 
  the 
  year. 
  Out 
  of 
  hundreds 
  

   of 
  eggs 
  of 
  C. 
  potnonella 
  only 
  one 
  parasite 
  was 
  obtained, 
  identified 
  by 
  

   N. 
  V. 
  Kurdjumov 
  as 
  Trichogramma 
  fasciatum 
  (Perkins) 
  ; 
  as 
  no 
  more 
  

   eggs 
  of 
  Cydiaweie 
  present 
  the 
  parasite 
  was 
  offered 
  eggs 
  of 
  Euproctis 
  

   chrysorrhoea 
  and 
  of 
  various 
  species 
  of 
  Mamestra, 
  Agrotis, 
  Leucoma, 
  

   Catocala 
  and 
  others, 
  also 
  eggs 
  of 
  spiders, 
  all 
  of 
  which 
  it 
  attacked. 
  From 
  

   one 
  Qgg, 
  from 
  2 
  to 
  21 
  specimens 
  of 
  the 
  parasite 
  were 
  obtained 
  and 
  

   during 
  7 
  months 
  11 
  parthenogenetic 
  generations 
  were 
  bred. 
  

  

  The 
  Stations 
  have 
  also 
  conducted 
  observations 
  on 
  Tmetocera 
  

   ocellana 
  and 
  on 
  a 
  Tenthredinid 
  sawfly. 
  The 
  latter 
  pest 
  has 
  done 
  con- 
  

   siderable 
  damage 
  to 
  strawberries 
  in 
  the 
  district 
  of 
  Berdiansk 
  ; 
  it 
  

   multipUes 
  parthenogenetically, 
  although 
  both 
  males 
  and 
  females 
  have 
  

   been 
  observed. 
  Spraying 
  with 
  Paris 
  green 
  in 
  May 
  is 
  recommended 
  as 
  

   a 
  remedy. 
  

  

  FuscHiNi 
  (C). 
  Di 
  un 
  fattore 
  non 
  suflacientemente 
  studiato 
  nella 
  

   utllizzazione 
  dei 
  microorganismi 
  parassiti 
  d'insetti 
  nocivi. 
  [An 
  

  

  insufficiently 
  studied 
  factor 
  in 
  the 
  employment 
  of 
  micro-organ- 
  

   isms 
  parasitic 
  on 
  injurious 
  insects.] 
  — 
  Riv. 
  Vitic. 
  Enol. 
  Agrar., 
  

   Conegliano, 
  (5) 
  xx, 
  no. 
  4, 
  15th 
  Feb. 
  1914, 
  pp. 
  74-76. 
  

  

  The 
  use 
  of 
  parasitic 
  micro-organisms, 
  to 
  assist 
  the 
  agriculturist 
  

   against 
  his 
  insect 
  enemies, 
  only 
  dates 
  back 
  some 
  20 
  years. 
  As 
  in 
  the 
  

   case 
  of 
  predatory 
  and 
  endophagous 
  insects, 
  quite 
  a 
  new 
  field 
  has 
  been 
  

   opened 
  up. 
  It 
  is 
  presumed 
  that 
  microparasites 
  exist, 
  capable 
  of 
  

   reducing 
  the 
  numbers 
  of 
  most 
  injurious 
  insects 
  to 
  a 
  negligible 
  

   quantity 
  under 
  given 
  conditions. 
  The 
  author 
  holds 
  this 
  last 
  quali- 
  

   fication 
  to 
  be 
  the 
  important 
  factor 
  to 
  be 
  studied, 
  if 
  it 
  be 
  desired 
  to 
  

   reproduce 
  the 
  epidemic 
  artificially. 
  The 
  receptivity 
  of 
  the 
  intended 
  

   victim 
  is 
  quite 
  as 
  important 
  for 
  infection 
  as 
  the 
  presence 
  of 
  the 
  parasite. 
  

   The 
  non-success 
  recorded 
  by 
  Lounsbury 
  in 
  infecting 
  locusts 
  with 
  

   Coccobacillus 
  acridiorum 
  is 
  probably 
  due 
  not 
  only 
  to 
  a 
  loss 
  of 
  virulence 
  

   before 
  use, 
  as 
  suggested 
  by 
  him, 
  but 
  also 
  to 
  defective 
  receptivity 
  on 
  

   the 
  part 
  of 
  the 
  locusts. 
  The 
  conditions 
  which 
  influence 
  the 
  virulence 
  

   of 
  the 
  microparasites 
  and 
  the 
  receptivity 
  of 
  their 
  hosts 
  must 
  be 
  studied 
  

   with 
  equal 
  care. 
  

  

  IssLEiB 
  ( 
  — 
  ). 
  Die 
  Beseitigung 
  der 
  Insekten, 
  welche 
  den 
  Wein- 
  und 
  

   Obstbau 
  schadigen, 
  durch 
  Verklebung 
  mit 
  Hilfe 
  von 
  Moosschleim. 
  

   [The 
  removal 
  of 
  insects 
  injurious 
  to 
  orchards 
  and 
  vineyards 
  by 
  

   sticking 
  them 
  with 
  seaweed 
  mucilage.] 
  — 
  Zeitschr. 
  Pflanzenkrank- 
  

   heiten, 
  Stuttgart, 
  xxiv, 
  no. 
  2, 
  28th 
  Feb. 
  1914, 
  pp. 
  78-79. 
  

  

  The 
  author 
  believes 
  the 
  employment 
  of 
  seaweed 
  mucilage 
  to 
  be 
  a 
  

   new 
  and 
  promising 
  method 
  of 
  insect 
  pest 
  control. 
  The 
  mucilage 
  is 
  

   prepared 
  by 
  boihng 
  4 
  lb. 
  of 
  Irish 
  Moss 
  or 
  Iceland 
  Moss 
  {Fucus 
  caragahen) 
  

   in 
  20 
  gals, 
  water 
  for 
  one 
  hour, 
  whatever 
  is 
  lost 
  by 
  evaporation 
  being 
  

   made 
  up. 
  After 
  straining, 
  a 
  thick, 
  slimy 
  liquid 
  results. 
  On 
  drying, 
  

   this 
  leaves 
  a 
  thin 
  skin 
  which 
  gradually 
  comes 
  away 
  in 
  flakes. 
  If 
  

   the 
  mucilage 
  is 
  sprayed 
  on 
  infested 
  plants, 
  the 
  pieces 
  which 
  come 
  

   away 
  will 
  be 
  found 
  to 
  include 
  the 
  eggs 
  and 
  larvae 
  of 
  the 
  pests. 
  The 
  

   spray 
  must 
  be 
  apphed 
  only 
  on 
  dry 
  days 
  as 
  rain 
  will 
  wash 
  away 
  the 
  

  

  