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  species 
  of 
  fungi 
  known 
  to 
  attack 
  it, 
  but 
  probably 
  many 
  more 
  will 
  be 
  

   found 
  wiien 
  the 
  nut 
  is 
  thoroughly 
  studied. 
  

  

  Juglans 
  regia, 
  the 
  cultivated 
  Persian 
  walnut, 
  has 
  only 
  about 
  

   twelve 
  species 
  of 
  fungi 
  recorded 
  from 
  it 
  in 
  this 
  country. 
  There 
  are, 
  

   undoubtedly, 
  more 
  to 
  be 
  found. 
  Of 
  these 
  fungi 
  the 
  walnut 
  bacte- 
  

   riosis, 
  caused 
  by 
  a 
  bacterial 
  germ 
  is 
  more 
  important 
  than 
  all 
  the 
  rest 
  

   of 
  the 
  parasites 
  put 
  together 
  w^e 
  can 
  easily 
  say. 
  The 
  California 
  

   walnut 
  bacteriosis 
  has 
  turned 
  up 
  at 
  various 
  points 
  in 
  the 
  East. 
  The 
  

   twig 
  blight 
  form 
  of 
  this 
  disease 
  is 
  also 
  prevalent 
  in 
  various 
  states. 
  

   The 
  walnut 
  blight 
  or 
  bacteriosis 
  is 
  therefore 
  to 
  be 
  figured 
  with 
  in 
  

   planting 
  the 
  Persian 
  walnut 
  in 
  the 
  East. 
  

  

  Professor 
  Smith 
  : 
  Is 
  it 
  worse 
  or 
  better 
  here 
  than 
  in 
  California? 
  

  

  Professor 
  Waite 
  : 
  There 
  have 
  not 
  been 
  enough 
  walnuts 
  grown 
  

   here 
  in 
  groves 
  to 
  allow 
  the 
  disease 
  to 
  accumulate 
  — 
  to 
  have 
  a 
  fair 
  test 
  

   for 
  that, 
  Professor 
  Smith. 
  I 
  don't 
  believe 
  we 
  know; 
  but 
  it 
  is, 
  un- 
  

   doubtedly, 
  a 
  parasite 
  of 
  our 
  native 
  black 
  walnuts. 
  It 
  occurs 
  in 
  

   Texas 
  and 
  Louisiana, 
  and 
  I 
  think 
  we 
  have 
  it 
  in 
  or 
  near 
  Buffalo, 
  

   N. 
  Y., 
  and 
  in 
  New 
  Jersey, 
  so 
  if 
  I 
  were 
  planting 
  extensively 
  I 
  should 
  

   expect 
  that 
  disease 
  to 
  be 
  serious. 
  That 
  would 
  be 
  my 
  forecast 
  of 
  the 
  

   matter. 
  The 
  humidity 
  and 
  the 
  cloudy 
  weather 
  in 
  the 
  East 
  ought 
  to 
  

   be 
  more 
  favorable 
  to 
  the 
  disease 
  than 
  the 
  climate 
  of 
  California. 
  

  

  Mr. 
  Jones: 
  For 
  that 
  reason 
  I 
  should 
  think 
  the 
  disease 
  would 
  

   work 
  fast 
  in 
  the 
  Gulf 
  Coast. 
  

  

  Professor 
  Waite 
  : 
  Yes, 
  those 
  specimens 
  of 
  yours 
  seem 
  to 
  show 
  a 
  

   very 
  serious 
  condition. 
  

  

  "We 
  must 
  not 
  pass 
  over 
  the 
  chestnut 
  without 
  noting 
  that 
  there 
  are 
  

   thirty 
  species 
  of 
  fungi 
  attacking 
  it, 
  and 
  that 
  does 
  not 
  include 
  the 
  

   new 
  one, 
  the 
  bad 
  one, 
  the 
  chestnut 
  bark 
  disease. 
  

  

  The 
  filbert 
  blight 
  belongs 
  with 
  the 
  diseases 
  of 
  the 
  European 
  grape 
  

   and 
  sweet 
  cherry. 
  The 
  filbert 
  is 
  an 
  example 
  of 
  a 
  European 
  plant 
  

   introduced 
  into 
  the 
  eastern 
  United 
  States 
  attacked 
  by 
  a 
  native 
  para- 
  

   site 
  which 
  almost 
  drives 
  it 
  out 
  of 
  cultivation. 
  In 
  fact, 
  there 
  are 
  so 
  

   few 
  filberts 
  in 
  cultivation 
  even 
  now 
  that 
  if 
  we 
  were 
  trying 
  to 
  plan 
  a 
  

   spraying 
  experiment 
  on 
  them 
  we 
  would 
  not 
  know 
  where 
  to 
  find 
  a 
  

   plantation 
  suitable 
  for 
  carrying 
  on 
  the 
  experiment. 
  If 
  any 
  of 
  you 
  

   know 
  of 
  any 
  such 
  plantations 
  I 
  would 
  like 
  you 
  to 
  let 
  me 
  know 
  about 
  

   them. 
  

  

  The 
  Chairman 
  : 
  We 
  will 
  have 
  some 
  in 
  two 
  or 
  three 
  years. 
  

  

  Professor 
  Waite 
  : 
  Here 
  is 
  a 
  sample 
  of 
  the 
  filbert 
  fungus 
  taken 
  

   from 
  our 
  pathological 
  collection. 
  It 
  shows 
  the 
  mature 
  fruiting 
  

   bodies 
  of 
  the 
  fungus 
  and 
  it 
  also 
  shows 
  that 
  the 
  twigs 
  are 
  killed. 
  

  

  