﻿48 
  

  

  be 
  applied 
  along 
  the 
  branch 
  from 
  below 
  (towards 
  the 
  tip 
  of 
  the 
  branch 
  

   or 
  twig), 
  as 
  the 
  force 
  of 
  the 
  spray 
  will 
  momentarily 
  open 
  the 
  curled-up 
  

   leaves 
  ; 
  (14) 
  the 
  use 
  of 
  soap 
  at 
  the 
  rate 
  of 
  1 
  lb. 
  in 
  25 
  gallons 
  of 
  spray 
  

   is 
  advisable 
  ; 
  (15) 
  the 
  cost 
  of 
  the 
  application 
  should 
  not 
  exceed 
  Is. 
  6d. 
  

   per 
  tree 
  for 
  the 
  three 
  sprayings 
  together 
  ; 
  (16) 
  by 
  means 
  of 
  these 
  three 
  

   sprayings 
  a 
  good 
  crop 
  of 
  peaches 
  can 
  be 
  secured, 
  even 
  in 
  heavily 
  

   infested 
  orchards 
  ; 
  (17) 
  clean 
  cultivation 
  between 
  the 
  trees 
  is 
  advised 
  ; 
  

   cabbages, 
  parsnips 
  or 
  cruciferous 
  vegetables 
  should 
  not 
  be 
  grown 
  

   during 
  the 
  winter 
  in 
  or 
  near 
  the 
  part 
  of 
  the 
  garden 
  where 
  peach 
  trees 
  

   are 
  standing, 
  as 
  they 
  furnish 
  breeding 
  places 
  for 
  the 
  green 
  peach 
  aphis. 
  

   In 
  a 
  note 
  by 
  Mr. 
  Lounsbury 
  it 
  is 
  stated 
  that 
  the 
  above 
  report 
  on 
  

   spraying 
  tests 
  concerns 
  the 
  green 
  peach 
  aphis. 
  The 
  black 
  species 
  is 
  

   commonly 
  found 
  during 
  winter 
  ; 
  and 
  when 
  it 
  has 
  to 
  be 
  combated, 
  it 
  is 
  

   is 
  advisable 
  to 
  take 
  advantage 
  of 
  the 
  nakedness 
  of 
  the 
  twigs, 
  by 
  making 
  

   a 
  thorough 
  application 
  of 
  the 
  spraying 
  preparation 
  shortly 
  before 
  

   the 
  buds 
  open. 
  Should 
  three 
  sprayings, 
  as 
  recommended, 
  not 
  suffice 
  

   for 
  the 
  control 
  of 
  the 
  green 
  species, 
  as 
  may 
  be 
  the 
  case 
  in 
  seasons 
  

   which 
  particularly 
  favour 
  the 
  pest, 
  amplications 
  at 
  intervals 
  of 
  about 
  

   five 
  days 
  should 
  be 
  continued. 
  

  

  Van 
  Dine 
  (D. 
  L.). 
  Report 
  of 
  the 
  Entomologist. 
  — 
  Expt. 
  Sta. 
  of 
  the 
  

   Sugar 
  Producers^ 
  Assn. 
  of 
  Porto 
  Rico, 
  Rio 
  Piedras, 
  P.R., 
  Bull. 
  

   no. 
  5, 
  Aug. 
  1913, 
  pp. 
  25-46. 
  

  

  In 
  this 
  report 
  the 
  author 
  states 
  that 
  the 
  May-beetles 
  and 
  their 
  white 
  

   grubs 
  form 
  the 
  first 
  line 
  of 
  his 
  work, 
  since 
  the 
  control 
  of 
  these 
  insects 
  

   is 
  the 
  most 
  acute 
  problem 
  before 
  the 
  planter. 
  The 
  following 
  is 
  a 
  list 
  

   of 
  the 
  insects 
  affecting 
  sugar-cane 
  in 
  Porto 
  Rico, 
  together 
  with 
  their 
  

   natural 
  enemies, 
  and 
  an 
  indication 
  of 
  the 
  injury 
  they 
  cause 
  : 
  — 
  

  

  (1) 
  The 
  moth 
  stalk-borer 
  (Diatraea 
  saccharalis, 
  F.) 
  tunnels 
  into 
  the 
  

   cane 
  stalk 
  ; 
  kills 
  young 
  cane 
  ; 
  affects 
  the 
  germination 
  of 
  seed 
  cane. 
  

   Its 
  enemies 
  are 
  an 
  egg-parasite, 
  Trichogramma 
  minutum, 
  Riley 
  ; 
  a 
  

   Tachinid 
  fly, 
  Tachinophyto 
  (Hypostena) 
  sp. 
  ; 
  and 
  a 
  fungus, 
  Cordiceps 
  

   barberi, 
  Giard 
  ; 
  (2) 
  May-beetles 
  and 
  white 
  grubs 
  {Lachnosterna 
  spp.) 
  

   The 
  adults 
  feed 
  upon 
  the 
  leaves, 
  and 
  the 
  larvae 
  upon 
  the 
  roots 
  and 
  the 
  

   root-stalks 
  externally 
  ; 
  their 
  enemies 
  are 
  : 
  a 
  wasp, 
  Elis 
  sexcinta, 
  F. 
  ; 
  

   the 
  Tachinid 
  flies, 
  Cryptomeigenia 
  aurifacies 
  and 
  Eutrixoides 
  jonesii 
  ; 
  

   an 
  Elaterid 
  beetle, 
  Pyrophorus 
  luminosus, 
  111. 
  ; 
  a 
  fungus, 
  Metarrhizium 
  

   anisopliae, 
  Metsch. 
  ; 
  " 
  blackbirds 
  " 
  {Crotophaga 
  ani 
  and 
  Holoquiscalus 
  

   brachypterus); 
  (3) 
  the 
  weevil 
  root-borer 
  {Diaprepes 
  spengleri, 
  L.), 
  whose 
  

   larvae 
  feed 
  within 
  the 
  root-stalk 
  and 
  prune 
  the 
  roots 
  to 
  some 
  extent 
  ; 
  

   the 
  blackbirds, 
  noted 
  under 
  Lachnosterna, 
  feed 
  upon 
  its 
  larvae 
  at 
  

   ploughing 
  time 
  ; 
  (4) 
  Rhinoceros 
  beetles 
  (undetermined 
  Dynastids). 
  

   Their 
  larvae 
  feed 
  upon 
  the 
  roots, 
  and 
  within 
  the 
  root-stalk 
  ; 
  the 
  

   fungus, 
  Metarrhizium 
  anisopliae, 
  and 
  the 
  blackbirds, 
  both 
  noted 
  under 
  

   Lachnosterna, 
  are 
  natural 
  enemies 
  ; 
  (5) 
  The 
  Mealy-bug 
  (Pseudococcus 
  

   sacchari, 
  Ckll.), 
  feeds 
  on 
  the 
  underground 
  portions 
  of 
  young 
  cane, 
  at 
  

   the 
  base 
  of 
  the 
  leaves, 
  and 
  beneath 
  leaf-sheaths 
  of 
  older 
  cane; 
  the 
  

   introduced 
  ladybird 
  beetle, 
  Cryptolaemus 
  montrouzieri, 
  Muls., 
  and 
  the 
  

   parasitic 
  fungi, 
  Aspergillus 
  sp. 
  and 
  Isaria 
  sp., 
  are 
  natural 
  enemies 
  ; 
  

   (6) 
  the 
  mole-cricket 
  (Scapteriscus 
  didactylus, 
  Latr.), 
  eats 
  into 
  seed 
  cane 
  

   and 
  the 
  young 
  shoots 
  beneath 
  the 
  surface 
  of 
  the 
  ground; 
  natural 
  

   enemies 
  are 
  the 
  blackbirds 
  and 
  lizards 
  ; 
  (7) 
  the 
  southern 
  grass- 
  worm 
  

  

  