﻿44 
  

  

  completely 
  wipe 
  out 
  the 
  orcharding 
  industry 
  is 
  a 
  subject 
  of 
  

   large 
  importance. 
  Personally 
  I 
  believe 
  that 
  chestnuts 
  will 
  be 
  

   raised 
  commercially 
  in 
  Pennsylvania 
  in 
  increased 
  abundance, 
  

   and 
  as 
  the 
  various 
  phases 
  of 
  the 
  blight 
  subject 
  are 
  brought 
  to 
  

   light, 
  keeping 
  the 
  disease 
  under 
  control 
  can 
  be 
  more 
  easily 
  ac- 
  

   complished. 
  At 
  the 
  present 
  time 
  this 
  is 
  being 
  done 
  in 
  certain 
  

   orchards 
  by 
  the 
  present 
  methods 
  of 
  examining 
  the 
  trees 
  often, 
  

   treating 
  each 
  infection, 
  or 
  removing 
  the 
  tree. 
  If 
  this 
  policy 
  is 
  

   successfully 
  pursued 
  for 
  several 
  more 
  years 
  it 
  will 
  demonstrate 
  

   conclusively 
  that 
  chestnuts 
  can 
  be 
  grown 
  in 
  spite 
  of 
  the 
  blight 
  

   and 
  this 
  will 
  mean 
  an 
  opportunity 
  to 
  use 
  vast 
  areas 
  of 
  waste 
  

   land 
  in 
  Pennsylvania 
  and 
  in 
  the 
  other 
  states, 
  in 
  a 
  highly 
  profita- 
  

   ble 
  manner. 
  

  

  The 
  Chairman: 
  The 
  subject 
  of 
  the 
  next 
  paper 
  is 
  Some 
  

   Problems 
  in 
  the 
  Treatment 
  of 
  the 
  Chestnut. 
  It 
  will 
  be 
  pre- 
  

   sented 
  by 
  Mr. 
  Pierce, 
  after 
  which 
  we 
  will 
  have 
  a 
  general 
  dis- 
  

   cussion 
  of 
  the 
  entire 
  subject. 
  

  

  Mr. 
  Pierce: 
  Mr. 
  President, 
  ladies 
  and 
  gentlemen: 
  I 
  see 
  

   that, 
  as 
  we 
  wrote 
  our 
  papers 
  separately, 
  some 
  of 
  the 
  things 
  I 
  

   had 
  in 
  mind 
  will 
  be 
  similar 
  to 
  those 
  Mr. 
  Rockey 
  had. 
  

  

  SOME 
  PROBLEMS 
  IN 
  THE 
  TREATMENT 
  OF 
  DISEASED 
  

  

  CHESTNUT 
  TREES 
  

  

  By 
  Roy 
  G. 
  Pierce 
  

   Tree 
  Surgeon, 
  Pennsylvania 
  Chestnut 
  Tree 
  Blight 
  Commission 
  

  

  The 
  problems 
  that 
  present 
  themselves 
  to 
  the 
  growers 
  of 
  

   chestnut 
  trees 
  concerning 
  the 
  present 
  disease 
  may 
  be 
  summed 
  

   up 
  under 
  three 
  heads: 
  first, 
  what 
  the 
  disease 
  is, 
  how 
  it 
  is 
  caused, 
  

   and 
  how 
  it 
  may 
  be 
  recognized; 
  second, 
  what 
  is 
  to 
  be 
  done 
  with 
  

   diseased 
  trees 
  to 
  bring 
  them 
  to 
  health 
  or 
  to 
  prevent 
  them 
  from 
  

   infecting 
  other 
  healthy 
  trees 
  nearby; 
  third, 
  what 
  means 
  in 
  the 
  

   future 
  can 
  be 
  undertaken 
  to 
  keep 
  a 
  tree 
  healthy, 
  that 
  is, 
  to 
  

   prevent 
  reinfection. 
  

  

  First, 
  what 
  the 
  disease 
  is, 
  how 
  it 
  is 
  caused, 
  and 
  how 
  it 
  may 
  

   be 
  recognized. 
  The 
  disease 
  known 
  as 
  the 
  chestnut 
  tree 
  blight 
  

   is 
  caused 
  by 
  the 
  fungus, 
  Diaporthe 
  parasitica, 
  which 
  usually 
  finds 
  

   entrance 
  to 
  the 
  tree 
  through 
  wounds 
  in 
  the 
  bark. 
  The 
  mycelium 
  

   or 
  mass 
  of 
  fungous 
  filaments 
  gradually 
  spreads 
  through 
  the 
  bark 
  

  

  