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  59 
  — 
  

  

  siphyllmti). 
  Among 
  the 
  other 
  host 
  plants 
  are 
  mignonette, 
  pinks, 
  roses, 
  

   apricots, 
  cucumbers, 
  musk-melons, 
  fever 
  few, 
  verbenas, 
  sage, 
  helio- 
  

   trope, 
  cypress 
  vine, 
  moon-flower, 
  morning-glory, 
  tomato, 
  egg-plant, 
  

  

  Rg 
  3. 
  

  

  The 
  Red 
  Spider, 
  Tetranychus 
  hi- 
  The 
  Red 
  Spider, 
  Tetranychus 
  bi- 
  The 
  Red 
  Spider, 
  Te- 
  

  

  ntaculattis, 
  male, 
  greatly 
  mr.gnified. 
  viaculatiis, 
  female, 
  greatly 
  magni- 
  trafiychus 
  bhiiaculatus, 
  

   (Harvey.) 
  fied. 
  (Harvey.) 
  foot. 
  (Harvey.) 
  

  

  hop, 
  and 
  calla. 
  If 
  an 
  insecticide 
  operation 
  is 
  required 
  for 
  the 
  destruc- 
  

   tion 
  of 
  the 
  red 
  spider 
  in 
  beet 
  fields, 
  the 
  usual 
  kerosene 
  sprays 
  (see 
  page 
  

   53) 
  would 
  probably 
  be 
  effective 
  if 
  so 
  applied 
  as 
  to 
  reach 
  the 
  under 
  

   side 
  of 
  the 
  leaves. 
  

  

  Leaves 
  itiarked 
  with 
  irregular 
  blister-like 
  blotches, 
  due 
  to 
  removal 
  of 
  

   substance 
  between 
  the 
  upper 
  and 
  the 
  lower 
  cuticle. 
  

  

  THE 
  BEET 
  LEAF-MINERS. 
  

  

  Chortophila 
  floccosa 
  Macq. 
  

  

  Chortophila 
  beiarum 
  Lintn. 
  

  

  Pegomyia 
  vicitia 
  Lintn. 
  

  

  The 
  beet 
  leaf-miners 
  are 
  the 
  larvae 
  or 
  maggots 
  of 
  small 
  flies 
  which 
  

  

  mine 
  out 
  the 
  interior 
  substance 
  of 
  the 
  leaf 
  in 
  blotches 
  of 
  various 
  shape, 
  

  

  leaving 
  the 
  cuticle 
  entire 
  until 
  it 
  is 
  ruptured 
  later 
  by 
  the 
  escape 
  of 
  the 
  

  

  full-grown 
  larva 
  for 
  pupation 
  in 
  the 
  earth. 
  The 
  abandoned 
  mines 
  then 
  

  

  become 
  dried, 
  shriveled, 
  and 
  discolored, 
  and 
  are 
  further 
  torn 
  by 
  the 
  

  

  subsequent 
  growth 
  of 
  the 
  leaf. 
  

  

  The 
  three 
  species 
  known 
  to 
  injure 
  the 
  beet 
  in 
  America 
  were 
  re- 
  

   ported 
  from 
  a 
  single 
  vegetable 
  garden 
  in 
  New 
  York 
  by 
  Dr. 
  J. 
  A. 
  Lintner 
  

  

  