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  disease 
  of 
  the 
  San 
  Jose 
  scale 
  it 
  is 
  evident 
  that 
  the 
  distribution 
  of 
  S. 
  

   coccophila 
  under 
  conditions 
  prevailing 
  in 
  southern 
  Illinois 
  this 
  year 
  is 
  

   likely 
  to 
  prove 
  a 
  valuable 
  adjunct 
  to 
  more 
  energetic 
  measures 
  for 
  the 
  

   destruction 
  of 
  this 
  insect. 
  Indeed, 
  we 
  may 
  go 
  so 
  far 
  as 
  to 
  say 
  that 
  if 
  

   the 
  scale 
  should 
  finally 
  become 
  a 
  permanent 
  resident 
  in 
  this 
  state, 
  it 
  is 
  

   quite 
  possible 
  that 
  this 
  and 
  similar 
  enemies 
  will 
  form 
  a 
  permanent 
  check 
  

   upon 
  its 
  multiplication 
  sach 
  as 
  to 
  reduce 
  its 
  injuries 
  to 
  comparative 
  

   insignificance. 
  It 
  must 
  be 
  noted, 
  however, 
  that 
  the 
  summer 
  of 
  1898 
  

   was 
  favorable 
  to 
  the 
  growth 
  and 
  reproduction 
  of 
  this 
  fungus 
  species, 
  

   both 
  with 
  respect 
  to 
  temperature 
  and 
  rainfall. 
  An 
  abundance 
  of 
  rain- 
  

   fall 
  was, 
  in 
  fact, 
  shown 
  by 
  my 
  laboratory 
  culture 
  experiments 
  to 
  be 
  

   indispensable 
  to 
  the 
  profuse 
  fruiting 
  of 
  the 
  fungus, 
  cultures 
  made 
  on 
  a 
  

   comparatively 
  dry 
  medium 
  often 
  growing 
  freely 
  but 
  remaining 
  sterile 
  

   for 
  weeks, 
  while 
  those 
  made 
  in 
  a 
  saturated 
  atmosphere 
  would 
  fruit 
  with 
  

   excessive 
  abundance 
  within 
  four 
  days 
  from 
  the 
  sowing 
  of 
  the 
  spores. 
  

   In 
  a 
  dry 
  season, 
  consequently, 
  we 
  cannot 
  expect 
  a 
  rapid 
  spread 
  of 
  this 
  

   fungus 
  from 
  scattered 
  infection 
  points. 
  

  

  Field 
  Notes 
  on 
  Fungous 
  Infection. 
  

  

  More 
  definite 
  details 
  with 
  regard 
  to 
  the 
  spread 
  of 
  this 
  fungous 
  

   infection 
  in 
  the 
  field 
  are 
  presented 
  in 
  the 
  following 
  items 
  abstracted 
  

   from 
  the 
  notes 
  of 
  Mr. 
  E. 
  B. 
  Forbes, 
  the 
  Assistant 
  in 
  charge 
  of 
  the 
  

   experiments. 
  

  

  NeigJiborliood 
  of 
  Sparta. 
  

  

  OrcJiard 
  of 
  J. 
  M. 
  Temple. 
  — 
  Twigs 
  and 
  bark 
  of 
  oak 
  from 
  Florida 
  

   bearing 
  infected 
  scales 
  were 
  tied 
  April 
  30, 
  1S98, 
  to 
  seventy-six 
  trees 
  in 
  

   this 
  orchard. 
  May 
  27th, 
  a 
  large 
  number 
  of 
  scales 
  were 
  examined 
  

   microscopically, 
  but 
  no 
  positive 
  case 
  of 
  death 
  from 
  the 
  fungus 
  was 
  

   found. 
  A 
  few 
  dead 
  scales 
  were 
  detected 
  near 
  the 
  infected 
  places, 
  but 
  

   they 
  either 
  contained 
  no 
  fungi 
  or 
  a 
  fungus 
  not 
  resembling 
  Sphierostilbe 
  

   in 
  any 
  form 
  known 
  to 
  me. 
  

  

  July 
  6th, 
  examined 
  trees 
  infected 
  April 
  30th 
  and 
  May 
  2d 
  with 
  

   SpJuerostilbe 
  coccophila. 
  In 
  every 
  case 
  where 
  scales 
  were 
  abundant 
  and 
  

   the 
  infection 
  material 
  thrifty 
  and 
  plentiful 
  the 
  fungus 
  had 
  spread 
  from 
  

   the 
  bark 
  or 
  twig 
  tied 
  to 
  the 
  tree. 
  The 
  growth 
  was 
  nowhere 
  profuse, 
  nor 
  

   was 
  it 
  even 
  generally 
  present 
  on 
  the 
  scales 
  in 
  the 
  immediate 
  vicinity 
  of 
  

   the 
  infection 
  material. 
  A 
  slight 
  start 
  had 
  been 
  made 
  in 
  quite 
  favorable 
  

   situations, 
  but 
  where 
  only 
  a- 
  few 
  scattered 
  scales 
  were 
  present 
  no 
  growth 
  

   was 
  made, 
  and 
  in 
  no 
  instance 
  had 
  the 
  fungus 
  spread 
  from 
  the 
  immediate 
  

   surface 
  originally 
  infected. 
  

  

  September 
  ist, 
  fungus 
  growing 
  everywhere 
  vigorously. 
  Sometimes 
  

   spread 
  downwards 
  as 
  much 
  as 
  five 
  feet, 
  and 
  on 
  laterals 
  as 
  much 
  as 
  one 
  

  

  