﻿THE 
  CHEERY 
  FRUIT 
  SAWFLY. 
  77 
  

  

  orchard 
  under 
  observation 
  there 
  were 
  early 
  and 
  late 
  blooming 
  cherries 
  

   in 
  alternating 
  rows. 
  Eggs 
  of 
  this 
  insect 
  were 
  numerous 
  and 
  a 
  few 
  

   larvae 
  present 
  before 
  the 
  adults 
  apparently 
  noticed 
  the 
  later-blooming 
  

   varieties. 
  Afterwards, 
  when 
  the 
  petals 
  of 
  the 
  Royal 
  Anne 
  cherry 
  

   were 
  beginning 
  to 
  open, 
  eggs 
  were 
  just 
  being 
  deposited 
  in 
  numbers 
  in 
  

   this 
  variety 
  while 
  the 
  Black 
  Tartarians 
  immediately 
  adjoining 
  these 
  

   trees 
  had 
  shed 
  the 
  petals 
  and 
  the 
  larvae 
  had 
  mostly 
  hatched 
  and 
  only 
  

   very 
  rarely 
  could 
  an 
  egg 
  be 
  found. 
  The 
  time 
  required 
  for 
  incubation 
  

   of 
  the 
  egg 
  is 
  practically 
  the 
  same 
  in 
  all 
  varieties 
  of 
  fruits. 
  Ordinarily 
  

   only 
  one 
  egg 
  is 
  deposited 
  in 
  a 
  single 
  flower. 
  Occasionally, 
  however, 
  

   two 
  and 
  very 
  rarely 
  three 
  eggs 
  were 
  found 
  in 
  the 
  sepals 
  and 
  calyx 
  of 
  

   one 
  flower. 
  

  

  THE 
  LARVA. 
  

  

  Upon 
  hatching 
  the 
  young 
  larva 
  may 
  feed 
  for 
  a 
  short 
  time 
  in 
  the 
  

   tissue 
  immediately 
  surrounding 
  the 
  egg 
  cavity, 
  or 
  on 
  the 
  inner 
  sur- 
  

   face 
  of 
  the 
  calyx 
  cup, 
  but 
  it 
  soon 
  finds 
  its 
  way 
  to 
  the 
  bottom 
  of 
  the 
  

   calyx 
  cup 
  and 
  eats 
  directly 
  into 
  the 
  newly 
  formed 
  cherry. 
  The 
  larva 
  

   at 
  this 
  time 
  almost 
  always 
  enters 
  the 
  fruit 
  through 
  the 
  base 
  imme- 
  

   diately 
  adjoining 
  or 
  very 
  near 
  the 
  stem. 
  Going 
  directly 
  to 
  the 
  center 
  

   of 
  the 
  cherry, 
  the 
  larva 
  eats 
  away 
  the 
  small 
  kernel. 
  The 
  cherry 
  thus 
  

   injured 
  soon 
  withers. 
  In 
  two 
  to 
  four 
  days 
  after 
  entrance 
  the 
  larva 
  

   makes 
  its 
  first 
  molt 
  and 
  leaves 
  this 
  cherry 
  in 
  search 
  of 
  other 
  and 
  fresh 
  

   food. 
  When 
  attacking 
  the 
  second 
  cherry 
  the 
  larva 
  may 
  enter 
  the 
  

   fruit 
  through 
  almost 
  any 
  place 
  on 
  the 
  surface 
  but 
  invariably 
  goes 
  

   directly 
  to 
  the 
  seed, 
  and 
  if 
  this 
  has 
  not 
  hardened 
  eats 
  out 
  the 
  kernel, 
  

   as 
  was 
  done 
  with 
  the 
  first 
  fruit, 
  seeming 
  to 
  prefer 
  this 
  to 
  the 
  meat 
  of 
  

   the 
  cherry. 
  The 
  second 
  cherry, 
  being 
  larger 
  when 
  attacked, 
  usually 
  

   withstands 
  the 
  effects 
  of 
  feeding 
  longer 
  and 
  the 
  larva 
  may 
  remain 
  inside 
  

   for 
  some 
  six 
  to 
  ten 
  days 
  or 
  even 
  longer. 
  The 
  growth 
  of 
  the 
  cherry 
  is 
  

   checked 
  and 
  it 
  frequently 
  hangs 
  on 
  the 
  tree 
  retaining 
  a 
  rather 
  pale 
  

   green 
  color 
  for 
  some 
  days 
  after 
  growth 
  ceases 
  and 
  the 
  fruit 
  has 
  

   shriveled. 
  When 
  the 
  kernel 
  hi 
  this 
  second 
  cherry 
  has 
  been 
  destroyed 
  

   the 
  larva 
  usually 
  goes 
  to 
  a 
  third 
  cherry 
  and 
  if 
  the 
  pit 
  has 
  not 
  hardened 
  

   eats 
  it 
  out 
  as 
  before. 
  However, 
  when 
  the 
  pits 
  become 
  too 
  hard 
  the 
  

   larva 
  feeds 
  on 
  the 
  meat 
  of 
  the 
  cherry 
  near 
  the 
  pit 
  until 
  it 
  attains 
  full 
  

   growth 
  in 
  much 
  the 
  same 
  manner 
  as 
  does 
  the 
  plum 
  curculio 
  in 
  peaches. 
  

   In 
  Plate 
  IX 
  are 
  shown 
  photographs 
  of 
  the 
  injured 
  fruit 
  and 
  the 
  

   entrance 
  and 
  exit 
  holes 
  of 
  the 
  larvae. 
  

  

  Each 
  larva 
  usually 
  destroys 
  three 
  cherries, 
  although 
  some 
  go 
  to 
  the 
  

   fourth, 
  while 
  a 
  very 
  few 
  complete 
  their 
  growth 
  in 
  the 
  second 
  cherry. 
  

   The 
  time 
  required 
  for 
  the 
  larvae 
  to 
  attain 
  their 
  full 
  growth 
  averages 
  

   from 
  22 
  to 
  26 
  days. 
  In 
  Table 
  I 
  the 
  record 
  is 
  given 
  for 
  34 
  individuals. 
  

  

  