﻿562 
  

  

  number 
  tried 
  ; 
  the 
  only 
  drawback 
  to 
  its 
  use 
  is 
  the 
  cost 
  of 
  the 
  oil 
  — 
  

   45. 
  2d. 
  per 
  gallon. 
  As 
  lime-sulphur 
  is 
  cheaper 
  and 
  will 
  control 
  the 
  

   scale 
  if 
  properly 
  appUed, 
  Unseed 
  oil 
  emulsion 
  has 
  not 
  been 
  recom- 
  

   mended, 
  but 
  where 
  trees 
  are 
  very 
  badly 
  infested 
  a 
  first 
  spraying 
  with 
  

   this 
  emulsion 
  may 
  well 
  be 
  afforded, 
  because 
  of 
  its 
  greater 
  and 
  more 
  

   immediate 
  effectiveness. 
  Linseed 
  oil 
  emulsion 
  also 
  has 
  a 
  special 
  value 
  

   for 
  spraying 
  trees 
  which 
  are 
  close 
  to 
  buildings 
  as 
  it 
  does 
  not 
  damage 
  

   paint. 
  The 
  stock 
  solution 
  is 
  directed 
  to 
  be 
  made 
  as 
  follows 
  : 
  — 
  Raw 
  

   linseed 
  oil 
  2 
  gals., 
  soft 
  soap 
  2 
  quarts, 
  rain-water 
  1 
  gal. 
  The 
  soap 
  is 
  

   dissolved 
  in 
  boihng 
  water 
  and 
  the 
  oil 
  at 
  once 
  added 
  and 
  the 
  mixture 
  

   churned 
  to 
  a 
  creamy 
  emulsion. 
  For 
  use, 
  dilute 
  1 
  gal. 
  of 
  this 
  with 
  

   15 
  gals, 
  of 
  water. 
  The 
  authors 
  say 
  that 
  they 
  have 
  obtained 
  the 
  best 
  

   results 
  by 
  making 
  the 
  solution 
  immediately 
  before 
  use. 
  

  

  Tobacco 
  extract. 
  Within 
  the 
  last 
  few 
  years 
  several 
  tobacco 
  ex- 
  

   tracts, 
  the 
  best 
  known 
  of 
  which 
  are 
  " 
  Black 
  Leaf 
  " 
  and 
  " 
  Black 
  Leaf 
  

   40," 
  have 
  come 
  into 
  prominence 
  as 
  contact 
  insecticides, 
  being 
  used 
  

   with 
  marked 
  success 
  against 
  plant 
  lice. 
  They 
  are 
  guaranteed 
  to 
  

   contain 
  2*7 
  per 
  cent, 
  and 
  40 
  per 
  cent, 
  of 
  nicotin 
  respectively 
  ; 
  the 
  

   nicotin 
  is 
  said 
  to 
  be 
  in 
  the 
  form 
  of 
  nicotin 
  sulphate. 
  The 
  authors 
  give 
  

   the 
  following 
  formulae 
  : 
  — 
  For 
  plant 
  hce 
  use 
  " 
  Black 
  Leaf 
  40 
  " 
  f 
  oz., 
  

   soap 
  2 
  oz., 
  water 
  4 
  gals.; 
  or 
  "Black 
  Leaf 
  " 
  1 
  gal., 
  soap 
  21b., 
  water 
  

   60 
  gals. 
  The 
  soap 
  is 
  not 
  absolutely 
  necessary, 
  but 
  improves 
  the 
  pene- 
  

   tration 
  qualities 
  of 
  the 
  spray. 
  " 
  Black 
  Leaf 
  " 
  costs 
  about 
  65. 
  3cZ. 
  a 
  

   gallon 
  and 
  " 
  Black 
  Leaf 
  40 
  "*^£2 
  12s. 
  for 
  2 
  lb. 
  

  

  Combination 
  sprays 
  are 
  dealt 
  with, 
  and 
  the 
  authors 
  remark 
  that 
  

   their 
  use 
  is 
  becoming 
  general, 
  their 
  chief 
  value 
  being 
  that 
  two 
  

   insecticides 
  are 
  applied 
  at 
  one 
  operation, 
  and 
  this 
  is 
  occasionally 
  

   of 
  great 
  importance 
  when 
  the 
  weather 
  is 
  treacherous. 
  The 
  

   desirabihty 
  or 
  otherwise 
  of 
  certain 
  combinations, 
  particularly 
  that 
  

   of 
  lime-sulphur 
  with 
  lead 
  arsenate, 
  is 
  discussed. 
  Paris 
  green 
  

   should 
  not 
  be 
  used 
  with 
  tobacco 
  extract 
  or 
  Hme-sulphur, 
  but 
  

   may 
  be 
  used 
  with 
  Bordeaux 
  mixture. 
  Arsenate 
  of 
  lead 
  may 
  be 
  

   used 
  with 
  all 
  three, 
  but 
  lime-sulphur 
  mixture 
  then 
  has 
  an 
  increased 
  

   tendency 
  to 
  burn 
  the 
  fohage. 
  Arsenite 
  of 
  zinc 
  is 
  not 
  advised 
  with 
  

   tobacco 
  extract 
  or 
  Bordeaux 
  mixture. 
  

  

  The 
  bulletin 
  concludes 
  with 
  a 
  table 
  showing 
  the 
  times 
  for 
  spraying 
  

   against 
  a 
  number 
  of 
  common 
  orchard 
  and 
  garden 
  pests. 
  

  

  Theobald 
  (F. 
  V.). 
  Report 
  on 
  Economic 
  Zoology. 
  — 
  South-Eastern 
  Agric. 
  

   Coll., 
  Wye, 
  2nd 
  April 
  1914, 
  158 
  pp., 
  69 
  figs., 
  17 
  pi. 
  

  

  The 
  present 
  report 
  deals 
  with 
  some 
  of 
  the 
  enquiries 
  received 
  between 
  

   October 
  1st, 
  1912 
  and 
  September 
  30th, 
  1913, 
  with 
  regard 
  to 
  insects 
  

   as 
  pests 
  on 
  cultivated 
  plants 
  or 
  as 
  harmful 
  to 
  man 
  and 
  animals. 
  Under 
  

   each 
  insect 
  mentioned 
  a 
  short 
  account 
  is 
  given 
  of 
  the 
  injury 
  it 
  

   does 
  and 
  the 
  best 
  method 
  of 
  destroying 
  it 
  ; 
  the 
  author 
  says 
  that 
  

   comparatively 
  few 
  of 
  the 
  communications 
  he 
  has 
  received 
  contained 
  

   any 
  features 
  of 
  special 
  interest, 
  the 
  majority 
  being 
  in 
  connection 
  

   with 
  common 
  pests 
  or 
  methods 
  of 
  spraying. 
  The 
  following 
  hsts 
  

   are 
  of 
  the 
  pests 
  which 
  have 
  attacked 
  fruit 
  trees 
  and 
  bushes 
  : 
  — 
  

  

  Apple 
  pests 
  : 
  Hop 
  dogs 
  (Dasychira 
  pudibunda) 
  ; 
  Dark 
  Gothic 
  

   Moth 
  (Naenia 
  typica) 
  ; 
  Wood 
  Leopard 
  (Zeuzera 
  pyrina) 
  ; 
  Charadrina 
  

   quadripunctata, 
  attacking 
  stored 
  apples 
  ; 
  Pale 
  Brindled 
  Beauty 
  Moth 
  

  

  