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  variety 
  has 
  maintained 
  a 
  reputation 
  during 
  a 
  majority 
  of 
  seasons 
  

   for 
  freedom 
  from 
  blight, 
  during 
  the 
  present 
  year 
  the 
  Eureka 
  is 
  

   badly 
  diseased 
  in 
  certain 
  sections 
  of 
  Orange 
  County. 
  This 
  may, 
  

   perhaps, 
  be 
  explained 
  by 
  the 
  prevalence 
  of 
  damp, 
  cloudy 
  weather 
  

   for 
  about 
  a 
  week 
  or 
  ten 
  days 
  during 
  the 
  first 
  of 
  May 
  when 
  this 
  

   variety 
  was 
  in 
  full 
  bloom. 
  In 
  one 
  grove 
  under 
  observation 
  the 
  

   trees 
  were 
  thought 
  to 
  have 
  lost 
  at 
  least 
  50 
  per 
  cent 
  of 
  their 
  blossoms 
  

   soon 
  after 
  blooming. 
  At 
  the 
  present 
  time 
  on 
  these 
  same 
  trees, 
  32 
  

   per 
  cent 
  of 
  the 
  nuts 
  are 
  afflicted 
  with 
  more 
  or 
  less 
  blight. 
  To 
  be 
  

   sure, 
  some 
  of 
  these 
  will 
  likely 
  mature, 
  but 
  the 
  appearance 
  of 
  blight 
  

   on 
  nearly 
  one 
  third 
  of 
  the 
  crop 
  shows 
  that 
  this 
  variety 
  has 
  very 
  

   little 
  resistant 
  power 
  against 
  walnut 
  blight. 
  Its 
  freedom 
  from 
  dis- 
  

   ease 
  in 
  the 
  past 
  has 
  no 
  doubt 
  been 
  due 
  largely 
  to 
  its 
  dormancy 
  

   during 
  the 
  most 
  favorable 
  weather 
  conditions 
  for 
  the 
  spread 
  of 
  

   blight. 
  

  

  The 
  field 
  for 
  the 
  selection 
  of 
  blight 
  resistant 
  varieties 
  must 
  

   necessarily 
  be 
  in 
  the 
  badly 
  blighted 
  sections. 
  A 
  tree 
  with 
  only 
  

   10 
  per 
  cent 
  blighted 
  nuts 
  in 
  an 
  orchard 
  having 
  an 
  average 
  of 
  70 
  

   per 
  cent 
  to 
  80 
  per 
  cent 
  may 
  really 
  be 
  more 
  resistant 
  to 
  blight 
  than 
  a 
  

   variety 
  which 
  appears 
  to 
  be 
  positively 
  free 
  from 
  the 
  disease 
  when 
  

   growing 
  among 
  trees 
  which 
  are 
  only 
  15 
  per 
  cent 
  to 
  20 
  per 
  cent 
  

   blighted. 
  In 
  making 
  observations 
  and 
  selections, 
  therefore, 
  it 
  is 
  

   quite 
  as 
  important 
  to 
  know 
  the 
  amount 
  of 
  blight 
  on 
  the 
  surround- 
  

   ing 
  trees 
  and 
  the 
  grove, 
  as 
  a 
  whole, 
  as 
  it 
  is 
  to 
  know 
  the 
  prevalence 
  

   of 
  blight 
  on 
  the 
  selected 
  individual. 
  The 
  extreme 
  variation 
  of 
  

   different 
  seedling 
  trees 
  in 
  their 
  susceptibility 
  to 
  this 
  disease 
  is 
  well 
  

   illustrated 
  in 
  some 
  of 
  the 
  following 
  observations 
  which 
  were 
  made 
  

   the 
  present 
  year. 
  The 
  percentages 
  which 
  follow 
  the 
  varieties 
  

   named 
  were 
  determined 
  by 
  counting 
  at 
  least 
  100 
  nuts 
  on 
  a 
  tree 
  

   just 
  before 
  the 
  blighted 
  nuts 
  began 
  to 
  drop. 
  In 
  a 
  seedling 
  grove 
  

   in 
  the 
  Whittier 
  district 
  about 
  300 
  trees 
  were 
  examined 
  and 
  100 
  

   nuts 
  counted 
  on 
  each 
  tree. 
  The 
  individual 
  trees 
  varied 
  from 
  2 
  

   per 
  cent 
  to 
  85 
  per 
  cent 
  blighted 
  nuts, 
  while 
  the 
  grove 
  as 
  a 
  whole 
  

   averaged 
  25 
  per 
  cent. 
  There 
  were 
  at 
  least 
  a 
  dozen 
  or 
  fifteen 
  trees 
  

   in 
  this 
  grove 
  which 
  were 
  blighted 
  less 
  than 
  10 
  per 
  cent, 
  although 
  

   some 
  of 
  the 
  nearby 
  trees 
  were 
  blighted 
  as 
  high 
  as 
  60 
  per 
  cent 
  or 
  

   70 
  per 
  cent. 
  

  

  Another 
  seedling 
  grove 
  in 
  Orange 
  County 
  which 
  was 
  counted 
  in 
  

   the 
  same 
  way, 
  averaged 
  47 
  per 
  cent 
  blighted 
  nuts 
  during 
  the 
  second 
  

   week 
  in 
  June. 
  In 
  making 
  this 
  determination 
  105 
  trees 
  were 
  ex- 
  

   amined. 
  In 
  this 
  same 
  grove, 
  there 
  were, 
  however, 
  at 
  least 
  three 
  

   trees 
  which 
  averaged 
  less 
  than 
  6 
  per 
  cent 
  blighted 
  nuts. 
  

  

  