﻿— 
  3° 
  — 
  

  

  It 
  could 
  only 
  be 
  moved 
  on 
  a 
  flat 
  car, 
  — 
  not 
  always 
  to 
  be 
  had 
  at 
  call, 
  — 
  

   and 
  loading 
  facilities 
  at 
  small 
  stations 
  were 
  sometimes 
  insufficient 
  for 
  

   the 
  handling 
  of 
  it. 
  These 
  experiences, 
  together 
  with 
  the 
  partial 
  failure 
  

   of 
  the 
  engine, 
  led 
  towards 
  the 
  end 
  of 
  the 
  season 
  to 
  a 
  substitution 
  of 
  

   hand 
  equipments 
  entirely 
  for 
  the 
  machine 
  sprayer, 
  three 
  of 
  these 
  being 
  

   in 
  the 
  field 
  at 
  once 
  during 
  the 
  latter 
  part 
  of 
  our 
  operations. 
  

  

  An 
  Efficient 
  Fungous 
  Disease.* 
  

  

  Notwithstanding 
  the 
  quantity 
  that 
  has 
  been 
  done 
  and 
  written 
  — 
  

   much 
  of 
  it 
  by 
  myself 
  — 
  concerning 
  the 
  use 
  of 
  the 
  bacterial 
  and 
  other 
  

   fungus 
  parasites 
  as 
  a 
  means 
  of 
  spreading 
  contagious 
  disease 
  among 
  in- 
  

   sects 
  for 
  their 
  destruction, 
  it 
  can 
  scarcely 
  be 
  said 
  that 
  this 
  insecticide 
  

   method 
  has 
  been 
  reduced 
  to 
  practice 
  with 
  entire 
  success 
  for 
  so 
  much 
  

   as 
  a 
  single 
  insect 
  species. 
  In 
  the 
  nearest 
  approximation 
  to 
  a 
  practical 
  

   method 
  yet 
  made, 
  the 
  use 
  of 
  Sporotrichum 
  for 
  the 
  chinch-bug, 
  the 
  

   results 
  have 
  been 
  from 
  the 
  beginning 
  so 
  equivocal 
  and 
  so 
  variable 
  that 
  

   this 
  method 
  has 
  never 
  yet 
  been 
  recommended 
  from 
  this 
  office 
  as 
  gener- 
  

   ally 
  available 
  or 
  in 
  any 
  way 
  trustworthy. 
  It 
  is 
  with 
  especial 
  satisfaction, 
  

   consequently, 
  that 
  1 
  now 
  report 
  a 
  series 
  of 
  experiments 
  with 
  a 
  fungus 
  

   parasite 
  of 
  the 
  San 
  Jose 
  scale, 
  first 
  successfully 
  applied 
  by 
  Prof. 
  P. 
  H. 
  

   Rolfs, 
  of 
  the 
  Florida 
  Agricultural 
  Experiment 
  Station, 
  which 
  gave 
  in 
  our 
  

   hands 
  during 
  the 
  summer 
  of 
  1898 
  great 
  promise 
  of 
  usefulness 
  as 
  a 
  strong 
  

   and 
  steady 
  check 
  upon 
  the 
  increase 
  of 
  this 
  orchard 
  pest. 
  

  

  The 
  conditions 
  of 
  experimentation 
  with 
  this 
  fungus 
  are 
  fortunately 
  

   very 
  favorable 
  to 
  tangible 
  and 
  precise 
  results. 
  The 
  scale 
  insects 
  being 
  

   motionless, 
  we 
  are 
  able 
  to 
  keep 
  the 
  identical 
  individuals 
  treated 
  under 
  

   continuous 
  observation 
  without 
  artificial 
  management; 
  and 
  the 
  fungus 
  

   used 
  being 
  one 
  not 
  native 
  to 
  the 
  San 
  Jose 
  scale, 
  the 
  results 
  of 
  experi- 
  

   mentation 
  are 
  not 
  liable 
  to 
  be 
  clouded 
  by 
  its 
  spontaneous 
  occurrence 
  

   either 
  before 
  or 
  after 
  the 
  experiment 
  is 
  begun. 
  It 
  has 
  been 
  very 
  easy, 
  

   consequently, 
  to 
  demonstrate 
  the 
  success 
  or 
  failure 
  in 
  every 
  case, 
  and 
  

   the 
  results 
  may 
  be 
  accepted 
  as 
  unequivocal. 
  

  

  The 
  existence 
  of 
  this 
  parasite 
  of 
  the 
  San 
  Jose 
  scale 
  was 
  first 
  

   brought 
  to 
  my 
  notice 
  by 
  a 
  letter 
  from 
  Prof. 
  John 
  B. 
  Smith, 
  written 
  

   January 
  5, 
  1897, 
  informing 
  me 
  that 
  Professor 
  Rolfs, 
  of 
  Florida, 
  seemed 
  

   to 
  have 
  found 
  a 
  specific 
  organism 
  which 
  "had 
  cleaned 
  out 
  some 
  infested 
  

   orchards 
  in 
  Florida 
  and 
  promised 
  to 
  control 
  the 
  scale 
  completely." 
  He 
  

   further 
  quoted 
  Professor 
  Rolfs 
  to 
  the 
  effect 
  that 
  the 
  fungus 
  had 
  with- 
  

   stood 
  quite 
  a 
  low 
  temperature, 
  and 
  that 
  it 
  was 
  a 
  constant 
  parasite 
  of 
  a 
  

   scale 
  on 
  the 
  oak. 
  He 
  was 
  also 
  kind 
  enough 
  to 
  send 
  me 
  a 
  small 
  quantity 
  

  

  * 
  See 
  Plate 
  IV., 
  Fig. 
  7, 
  for 
  an 
  illustration 
  of 
  the 
  characteristic 
  growth 
  of 
  SpJuv- 
  

   rostilbe 
  coccofhila 
  from 
  the 
  edges 
  of 
  a 
  San 
  Jose 
  scale 
  killed 
  by 
  this 
  fungus. 
  

  

  