E-482  June  1939 
 
 United  States  Departmont  of  Agriculture 
 '  Bureau  of  Entomology  and  Plant  Quarantine 
 
 THE  EFFECT  ON  PLANTS  OF  METHYL  BROMIDE  FUMIGATION  IN 
 JAPANESE  BEETLE  TREATMENT  TESTS;  PRELIMINARY  REPORT 
 
 By  Heber  C.  Donohoe,  Division  of  Control  Investigations, 
 and  V.  A.  Johnson,  Division  of  Japanese  Beetle  Control 
 
 The  writers  have  been  investigating  the  possibilities  for  the  use  of 
 methyl  bromide  as  a  fumigant  for  the  destructior  of  immature  stages  of  the 
 Japanese  beetle  in  greenhouse  and  nursery  stock  which  moves  from  withir  to 
 beyond  the  boundaries  of  the  area  under  Federal  quarantine  against  this 
 insect.  Early  in  the  work  results  indicated  that  complete  mortality  might  be 
 expected  with  a  fumigation  treatment  of  2-|-  pounds  of  methyl  bromide  per  1,000 
 cubic  feet  of  space,  including  the  load,  for  an  exposure  period  of  2-^  hours 
 at  a  minimum  temperature  of  soil  and  air  of  63°  F.  This  indication  has  since 
 been  confirmed,  and  approval  has  been  given  for  the  use  of  the  treatment  for 
 bare-rooted,  potted,  or  balled  plant  material,  with  certain  limitations  on 
 the  size  of  pots  and  soil  balls. 1/ 
 
 Concurrently  with  the  investigations  for  insect  mortality,  tests  have 
 been  made  to  develop  information  on  possible  injury  to  plants  as  a  result  of 
 this  treatment.  All  tests  were  made  at  a  dosage  of  2j  pounds  of  methyl 
 bromide  for  an  exposure  period  of  2j  hours.  The  lists  which  follow  record 
 the  observed  condition  of  experimental  plants  on  which  information  has  been 
 obtained  to  April  1,  1939.  Other  tests  are  under  observation  and  additional 
 ones  are  contemplated.  The  data  on  these  will  be  summarized  as  soon  as  the 
 accumulated  information  justifies  so  doing. 
 
 Individuals  using  these  records  as  a  basis  for  commercial  treatment 
 QX  plants  do  so  :t  their  own  risk.  The  data  shown  should  be  regarded  as 
 experimental  evidence  which  may  be  subj_ect  to  change  with  additional  experi- 
 mental and  practical  experience .  In  no  case  can  the  United  States  Dep?rt- 
 ment  of  Agriculture  or  employees  of  the  Department  be  held  responsible  for 
 injury  to  plants  as  a  result  of  fumigation  thereof. 
 
 In  many  cases  the  number  of  test  plants  is  too  small  to  be  of  definite 
 experimental  value.  In  other  cases  cultural  conditions  both  before  and 
 after  treatment  may  have  affected  the  results  obtained. 
 
 1/  B.E.P.Q.~359  (Supplement  No.  4),  H.  Methyl  Bromide  Fumigation, 
 Feb.  15,  1939.  Bur.  Ent.  and  Plant  Quar.,  Div.  of  Control  Inv.  2  pp., 
 mimeographed. 
 
-  2  - 
 
 The  list  reported  on  includes  greenhouse  material  showing  active 
 growth,  plants  in  a  semidormant  condition  from  cold  houses,  and  plants  in  a 
 state  of  complete  dormancy  from  out  of  doors.  All  were  held  for  observation 
 after  fumigation  in  heated  greenhouses  in  order  to  force  development. 
 
 So  far  as  possible  the  plant  names  conform  with  correct  botanical 
 nomenclature .2/  In  cases  in  which  the  correct  botanical  names  are  different 
 from  those  familiar  to  the  nursery  trade,  the  latter  are  also  listed  for 
 cross-reference  purposes.  Several  of  the  plants  listed  are  new  varieties 
 for  which  no  approved  names  are  available.  Within  some  groups,  notably 
 azaleas,  hydrangeas,  rhododendrons,  and  roses,  the  varieties  are  listed  in 
 accordance  with  their  accepted  names  in  the  trade  rather  than  in  strict 
 adherence  to  scientific  nomenclature. 
 
 List  No.  1  records  those  treated  plants  which,  experimentally,  have 
 shown  no  injury  or  complete  recovery  following  slight  initial  injury.  List 
 No.  2  is  an  account  of  the  plants  fumigated  which  showed  injury  or  appearance 
 of  injury  sufficient  to  render  the  plants  more  or  less  unmarketable.  In  most 
 cases  the  numbers  of  plants  were  small.  For  14  of  the  varieties  shown  no 
 controls  were  available.  In  the  opinion  of  nurserymen  who  cooperated  in 
 these  tests,  injury  in  many  cases  was  due  to  improper  care  after  treatment, 
 and  the  plants  suffered  therefrom  rather  than  from  the  fumigant .  Pending 
 additional  data,  all  varieties  contained  in  this  list  should  be  regarded  as 
 injured  and  handled  accordingly. 
 
 An  explanation  of  the  symbols  used  in  the  lists  is  as  follows: 
 (d)  Plants  in  a  dormant  condition  at  fumigation, 
 (sd)  Plants  in  a  semidormant  condition  at  fumigation, 
 (g)  Plants  from  greenhouses. 
 *  Plant  growth  stimulated  by  fumigation. 
 **  Plant  growth  slightly  retarded  by  fumigation. 
 ***  Slight  injury  followed  by  complete  recovery. 
 The  numeral  following  each  variety  shows  the  number  of  plants  fumigated. 
 
 The  lists  show  the  effect  of  methyl  bromide  fumigation  on  187  genera 
 of  plants  representing  503  horticultural  varieties  and  unnamed  entries.  Of 
 these,  6.5  percent  show  injury  or  suspected  injury  sufficient  to  render  the 
 plants  unsalable;  1.4  percent  of  the  varieties  either  died  or  failed  to  make 
 promising  recovery.  Injury  was  most  common  among  growing  greenhouse  plants 
 appearing  in  12.0  percent  of  these  varieties.  Among  the  dormant  and  semi- 
 dormant  plants,  only  3.2  percent  were  injured.  Since  many  of  the  deaths, 
 particularly  among  greenhouse  varieties,  are  believed  due  to  the  kind  of 
 care  rather  than  treatment,  additional  data  may  lower  these  percentages. 
 
 Of  the  uninjured  varieties,  stimulation  in  growth,  as  evidenced 
 primarily  by  early  breaking  of  leaf  or  flower  buds,  was  shown  by  11.1  per- 
 cent and  retardation  by  1.5  percent. 
 
 2/  The  writers  gratefully  acknowledge  the  assistance  of  Dr.  S.  F. 
 Blake,  Senior  Botanist,  Bureau  of  Plant  Industry,  in  rsviewing  the  plant 
 list  and  correcting  the  plant  names. 
 
-  3  - 
 
 List  No.  1. — Plants  fumigated  experimentally  with  methyl  bromide  with  success. 
 
 Acer  palmatum  atropurpureum  (d)  (3)  * 
 Adiantum  cuneatum  (g)  (1) 
 gloriosa  (g)  (1) 
 wrighti  (g)  (5) 
 Aglaonema  raodestura  (g)  (1) 
 Ajuga  reptans  (d)  (2) 
 Althaea  (see  Hibiscus) 
 Aloe  humilis  (g)  (2) 
 Alyssum  sp.  (d)  (2) 
 Ampelopsis  (see  Parthenocissus) 
 Anchusa  myosotidiflora  (d)  (2) 
 Anemone  hupehensis  (d)  (2) 
 Aquilegia:  var.  Mrs.  Scott  Elliot  (d)  (2) 
 Arabis  alpina  (d)  (2) 
 Aralia  (see  Fatsia) 
 Araucaria  excelsa  (g)  (5)  *** 
 Arctostaphylos  uva-ursi  (d)  (3) 
 Areca  (see  Chrysalidocarpus) 
 Arenaria  raontana  (d)  (1) 
 Armeria  (see  Statice) 
 
 Aronia  arbutifolia  brilliantissima  (d)  (1) 
 Artemisia  dracunculus  (d)  (2) 
 Asparagus  plumosus  nanus  (g)  (1) 
 Asplenium  nidis  (g)  (1) 
 Aster:  var.  Climax  (d)  (1) 
 
 Nancy  (d)  (2) 
 Astilbe  spp.  (d)  (11) 
 
 var.  Betsy  Cuperius  (d)  (1) 
 Peach  Blossom  (d)  (2) 
 Aucuba  crotonifolia  (g)  (5)  *** 
 
 japonica  variegata  (g)  (2) 
 Azalea  (listed  by  hort.  var.  names) 
 
 Alaska  (g)  (5) 
 
 Albert  and  Elizabeth  (g)  (5) 
 
 Albion  (g)  (11) 
 
 Alice  Muller  (g)  (5) 
 
 Amoena  (g)  (7) 
 
 Apple  Blossom  (g)  (7) 
 
 Avalanche  (g)  (5) 
 
 Binegiri  (d)  (5) 
 
 Blushing  Bride  (g)  (5) 
 
 Bouquet  Rose  (g)  (7) 
 
 Bridesmaid  (g)  (5) 
 
 Chas.  Encke  (g)  (16) 
 
 Christmas  Red  (g)  (5) 
 
 Christmas  Cheer  (g)  (5) 
 
 Constance  (g)  (8) 
 
 Crimson  Glory  (g)  (5) 
 
 Dame  Melanie  (g)  (5) 
 
 Daphne  (g)  (5) 
 
 UBRARY 
 §TAT£  P^-'^NT  BOARD 
 
-  4  - 
 
 List  No.  1  (continued) 
 
 Azalea  (continued) 
 
 Day  Break  (g)  (7). 
 
 Dorothy  Gish  (g)  (5) 
 
 Eclaireur  (g)  (5) 
 
 Eechhoutte  (g)  (1) 
 
 Empress  of  India  (g)  (8) 
 
 Ernest  Thiers  (g)  (5) 
 
 Fairy  (g)  (5) 
 
 Firefly  (g)  (5) 
 
 Firelight  (g)  (22) 
 
 Flame  (g)  (7) 
 
 Glory  (g)  (3) 
 
 Hexe  (g)  (39) 
 
 Hinodegiri  (d)  (19) 
 
 Hinoraayo  (d)  (5) 
 
 Indian  Chief  (g)  (5) 
 
 Indica  alba  (d)  (5) 
 
 Indica  rosea  (d)  (5) 
 
 Jean  Haerens  (g)  (12) 
 
 Jean  Peeters  (g)  (6) 
 
 J.  T.  Lovett  (d)  (2) 
 
 Lavender  Queen  (g)  (5) 
 
 L.  J.  Bobbink  (g)  (26) 
 
 Lorraine  (g)  (11) 
 
 Macrantha  (d)  (5) 
 
 Marie  Louise  (g)  (1) 
 
 Mary  Corcoran  (g)  (25) 
 
 Mauve  Beauty  (g)  (7) 
 
 Mme.  Morreux  (g)  (7) 
 
 Mme.  Petrick  (g)  (15) 
 
 Mme.  Petrick  Superba  (g)  (5) 
 
 Mme.  Van  der  Cruyssen  (d)  (15) 
 
 mollis  (d)  (4) 
 
 Morning  Glow  (g)  (7) 
 
 Mrs.  Fred  Sanders  (Mrs.  Fritz  Saunders)  (g)  (6) 
 
 New  Pink  (g)  (5) 
 
 new  varieties  (listed  by  breeder's  number) 
 
 K-3  (d)  (5) 
 
 K-4  (d)  (2) 
 
 K-7  (d)  (2) 
 
 K-10  (d)  (2) 
 
 K-24  (d)  (2) 
 
 K-34  (d)  (5) 
 
 K-44  (d)  (5) 
 
 056  (g)  (2) 
 
 0145  (g)  (2) 
 Niobe  (g)  (8) 
 Orange  Beauty  (g)  (7) 
 Orange  King  (g)  (5) 
 
 i 
 
-  5  - 
 
 List  No.  1  (continued) 
 
 Azalea  (continued) 
 
 Paul  Schame  (g)  (9) 
 Peach  Glow  (g)  (7) 
 Pink  Beauty  (g)  (5) 
 Pink  Pearl  (g)  (11) 
 Pink  Ruffles  (g)  (5) 
 Pres.  Oswald  de  Kerchove  (g)  (5) 
 Prof.  Walters  (g)  (8) 
 Purity  (g)  (5) 
 Raphael  (g)  (5) 
 Rose  (g)  (5) 
 Rose  Queen  (g)  (22) 
 Salmon  Glow  (g)  (6) 
 Salmon  Perfection  (g)  (5) 
 Schryveriana  (g)  (1) 
 Snow  (g)  (18) 
 Snow  Bank  (g)  (7) 
 Snow  Queen  (g)  (5) 
 Sunset  (g)  (5) 
 Suntan  (g)  (7) 
 Triomphe  (g)  (12) 
 Vervaeneana  (g)  (14) 
 Vervaeneana  alba  (g)  (5) 
 Yayegiri  (d)  (5) 
 Begonia:  var.  Chatelaine  supreme  (g)  (1) 
 Gibbs  (g)  (1) 
 hybrid  Lady  Mac  (g)  (4) 
 Rex  (g)  (3) 
 Berberis  gagnepainii  (d)  (3)  ** 
 julianae  (d)  (3)  * 
 thunbergii  (d)  (5) 
 triacanthophora  (d)  (3) 
 verruculosa  (d)  (3) 
 Bignonia  chinensis  (d)  (2) 
 
 grandiflora  (see  chinensis) 
 Mme.  Galen  (d)  (2) 
 Biota  (see  Thuja  orientalis) 
 Boston  fern  (see  Nephrolepis) 
 Bouvardia:  var.  Giant  Pink  (g)  (3)  *** 
 
 humboldtii  (g)  (3)  *** 
 Buddleia  sp.  (d)  (2) 
 
 var.  Pink  Charming  (d)  (1) 
 Buxus  japonica  (g)  (1) 
 
 sempervirens  (d)  (3) 
 Cactus  spp.  including  Ferocactus  and  Opuntia  (g)  (9) 
 Caladium  candidum  (hybrid:  Triomphe  de  1 'Exposition)  (g)  (1) 
 
 reposiura  (g)  (1) 
 Calceolaria  multiflora  nana  (g)  (3) 
 Calluna  vulgaris  (d)  (6) 
 Calycanthus  floridus  (d)  (1) 
 
-  6  - 
 
 List  No.  1  (continued) 
 
 Campanula  carpatica  (d)  (1) 
 garganica  (d)  (2) 
 isophylla  (d)  (2) 
 medium  (d)  (1) 
 medium  calycanthema  (d)  (1) 
 Caryopteris  incana  (d)  (5)  * 
 
 incana  superba  (d)  (3) 
 Cedrus  atlantica  (d)  (3) 
 Cerastium  biebersteinii  (d)  (2) 
 Cereus  peruvianus  (g)  (1) 
 Chaenomeles  lagenaria  (d)  (1) 
 Charaaecyparis  obtusa  crippsii  (d)  (1) 
 pisifera  (d)  [5) 
 plumosa  aurea  lovetti  ^d)  (1) 
 squarrosa  sulphurea  (d)  (3) 
 squarrosa  veitchii  (d)  (1) 
 (N.B.  Several  varieties  of  Charaaecyparis  injured 
 (see  list  No.  2).   Fumigation  of  this  genus 
 inadvisable  pending  additional  information.) 
 Chrysalidocarpus  lutescens  (g)  (1) 
 Chrysanthemum  arcticum  (d)  (2) 
 
 coccineum  (Painted  Daisy)  (d)  (2)  i 
 
 frutescens  (Marguerite)  (g)  (8)  *  /I 
 
 hortorum  (g)  (2) 
 sp. ;  Pink  Daisy  (d)  (1) 
 Cineraria  hybrida  (g)  (2) 
 
 raultiflora  (g)  (1) 
 Cissus  rhombifolia  (g)  (9) 
 
 striata  (g)  (2) 
 Citrus  sinensis  (g)  (2) 
 
 taitensis  (g)  (5) 
 Clematis  jackmani  (d)  (5) 
 
 Ramona  (d)  (2) 
 Clivia  hybrida  (g)  (3) 
 miniata  (g)  (1) 
 Codiaeum  sp.  (g)  (1) 
 Convallaria  majalis  (d)  (2) 
 Cordyline  indivisa  (g)  (2) 
 
 terminalis:  Firebrand  (g)  (1) 
 terminalis:  Mme .  E.  Andre  (g)  (4) 
 Cornus  alba  (sibirica)  (d)  (1) 
 florida  rubra  (sd)  (3) 
 stolonifera  lutea  (d)  (3)  * 
 Cotoneaster  applanata  (see  dielsiana) 
 dielsiana  (sd)  (5)  * 
 
 divaricata  (d)  (2)  I 
 
 francheti  (d)  (5) 
 
 horizontalis  (davidiana)  (d)  (5)  * 
 horizontalis  perpusilla  (sd)  (3) 
 
-  7  - 
 
 List  No.  1  (continued) 
 
 Cotoneaster  (continued) 
 
 lucida  (d)  (2) 
 microphylla  (d)  (2) 
 raicrophylla  glacialis  (d)  (4) 
 microphylla  thymifolia  (d)  (2; 
 pannosa  (d)  (2) 
 procumbens  (d)  (2) 
 racemiflora  veitchii  (d)  (2) 
 rotundifolia  (d)  (5)  * 
 salicifolia  (sd)  (3) 
 simonsi  (d)  (5) 
 Croton  (see  Codiaeum) 
 Cryptanthus  roseus  pictus  (g)  (1) 
 
 zonatus  zebrinus  (g)  (1) 
 Cyclamen  persicum  (g)  (4) 
 Cydonia  (see  Chaenomeles) 
 Cyperus  alternifolius  (g)  (1) 
 Cypress  (see  Chamaecyparis) 
 Cyrtomium  rochfordianum  compactum  (g)  (3) 
 Cytisus  canariensis  (g)  (2) 
 
 hybridus  elegans  (g)  (2) 
 scoparius  (d)  (5) 
 Daphne  sp.  (d)  (2) 
 Davallia  figiensis  (g)  (1) 
 
 lucida  (g)  (1) 
 Delphinium  belladonna  (d)  (2) 
 Dennstaedtia  cicutaria  (g)  (1) 
 Deutzia  gracilis  rosea  (d)  (1) 
 lemoinei  (d)  (3) 
 scabra  crenata  (d)  (1) 
 Dianthus  barbatus  (d)  (2) 
 Dicentra  spectabilis  (d)  (1) 
 Dieffenbachia  braziliensis  (g)  (2) 
 
 picta  (g)  (2) 
 Dielytra  (see  Dicentra) 
 Diervilla  florida  (d)  (4)  * 
 hybrida  (d)  (1) 
 hybrid:  Eva  Rathke  (d)  (1)  * 
 nana  variegata  (see  D.  hybrida) 
 rosea  (see  D.  florida) 
 Dracaena  (see  also  Cordyline) 
 
 fragrans  massangeana  (g)  (7) 
 godseffiana  (g)  (1) 
 Elaeagnus  pungens  (d)  (2) 
 Enkianthus  campanulatus  (sd)  (3)  ** 
 Epimedium  sp.  (d)  (8) 
 
 ■  musschianum  (d)  (1) 
 Epiphyllum  (see  Zygocactus) 
 
-  8  - 
 
 List  No.  1  (continued) 
 
 Erica  melanthera  (g)  (2) 
 
 vulgaris  (see  Calluna  vulgaris) 
 Erodiura  sp.  (d)  (2) 
 
 Eulalia  japonica  zebrina  (see  Miscanthus  sinensis  zebrinus' 
 Euonymus  alatus  (d)  (3) 
 
 japonicus:  Gold  Queen  (g)  (3) 
 radicans  (sd)  (500) 
 radicans  carrieri  (sd)  (500) 
 radicans  minimus  (g)  (1) 
 radicans  minimus  (d)  (12) 
 radicans  variegatus  (sd)  (200) 
 radicans  vegetus  (sd)  (500) 
 Eupatorium  coelestinura  (d)  (1) 
 Euphorbia  fulgens  (g)  (3) 
 
 pulcherrima  (see  Poinsettia) 
 Fagus  sylvatica  (sd)  (3)  * 
 Fatsia  japonica  (g)  (5) 
 Ficus  elastica  (g)  (2) 
 
 pumila  (repens)  (g)  (4) 
 Fittonia  argyroneura  (g)  (1) 
 Forsythia  intermedia  (d)  (1) 
 
 suspensa  fortunei  (d)  (3)  * 
 Funkia  (see  Hosta) 
 Gaillardia:  var.  Ruby  (d)  (2) 
 Gardenia  veitchii  (g)  (4) 
 Genista  (see  also  Cytisus) 
 
 pilosa  (d)  (3) 
 Geranium  zonale  (see  Pelargonium) 
 Ginkgo  biloba  fastigiata  (d)  (3)  * 
 Hedera  sp. :  Pittsburg  (g)  (9) 
 dankeriana  (g)  (2) 
 helix  (g)  (11) 
 helix  (d)  (2) 
 helix  baltica  (sd)  (3) 
 helix  variegata  (g)  (3) 
 Heleniura  autumnale:  Riverton  Beauty  (d)  (1) 
 Helianthemum  sp.  (d)  (2) 
 Helleborus  niger  (d)  (2) 
 Hemerocallis  sp.  (d)  (12) 
 
 var.  Gipsy  (d)  (1) 
 thunbergii  (d)  (2) 
 Heuchera  sanguinea  (d)  (6) 
 Hibiscus  syriacus:  Boule  de  Feu  (d)  (1) 
 Hosta  sp.  (d)  (6) 
 
 caerulea  (d)  (2) 
 Howea  belmoreana  (g)  (1) 
 
\ 
 
 -  9  - 
 List  No.  1  (continued) 
 
 Hydrangea  (listed  by  hort.  var.  names) 
 
 sp.  (d)  (1) 
 
 Altoona  (sd)  (9)  * 
 
 arborescens  grandiflora  (d)  (4)  * 
 
 Blauer  Prinz  (sd)  (2)  * 
 
 Deutschland  (sd)  (41)  * 
 
 Europa  (sd)  (10)  * 
 
 Gertrude  Glahn  (sd)  (28)  * 
 
 Goliath  (sd)  (25)  * 
 
 Hamburg  (sd)  (9)  * 
 
 Hamburg  (g)  (2)  * 
 
 Hollandia  (sd)  (3)  * 
 
 Kunert  (sd)  (8)  * 
 
 Le  Merville  (sd)  (2)  * 
 
 macrophylla  (g)  (1) 
 
 macrophylla  otaksa  (d)  (1) 
 
 Marshall  Foch  (sd)  (17)  * 
 
 Mme.  E.  Chautard  (sd)  (23)  * 
 
 Mrs.  Baardse  (sd)  (2) 
 
 Niedersachsen  (sd)  (44)  * 
 
 paniculata  (d)  (3)  ** 
 
 paniculata  grandiflora  (d)  (1) 
 
 petiolaris  (d)  (2) 
 
 Renovation  (sd)  (2) 
 
 Sch.  Perle  (sd)  (5)  * 
 
 Sch.  Perle  (g)  (2)  * 
 
 Splenders  (sd)  (3^ 
 
 Trophee  (sd)  (41) 
 
 Wilkomen  (sd)  (4)  * 
 
 Wilkomen  (g)  (1)  * 
 Hypericum  moserianum  (sd)  (3) 
 Ilex  aquifolium  (d)  (2)  * 
 
 crenata  microphylla  (d)  (3) 
 
 glabra  (d)  (3) 
 
 opaca  (sd)  (93) 
 Iris  kaempferi  (Japanese)  (d)  (6) 
 
 kaempferi:  E.  Parry  (d)  (2) 
 Ivy  (see  Hedera,  Parthenocissus) 
 Jasminum  nudiflorum  (d)  (7) 
 Juniperus  chinensis  pfitzeriana  (d)  (4) 
 communis  (d)  (3) 
 
 communis  canadensis  (see  depressa) 
 communis  depressa  (d)  (3) 
 communis  hibernica  (d)  (3) 
 excelsa  stricta  (d)  (1) 
 horizontalis  douglasii  (d)  (3) 
 plumosa  depressa  (see  J.  virginiana] 
 sabina  (d)  (3) 
 sabina  tamariscifolia  (d)  (3) 
 
-  10 
 
 List  No.  1  (continued) 
 
 Juniperus  (continued) 
 
 virginiana  canaertii  (d)  (3) 
 virginiana  (hort.  var.  pluraosa  depressa)  (d] 
 virginiana  schottii  (d)  (3) 
 (N.B.   Two  varieties  of  Juniperus  severely 
 injured.   Fumigation  of  this  genus  inadvisable 
 pending  additional  information.) 
 Kalanchoe  flammea:  Blossfeldiana  (g)  (2) 
 Kalmia  latifolia  (sd)  (3)  * 
 Kentia  belmoreana  (see  Howea) 
 Kerria  japonica  (d)  (3) 
 Kniphofia  uvaria  grandis  (d)  (2) 
 Kolkwitzia  amabilis  (d)  (3) 
 Liatris  pycnostachya  (d)  (2) 
 Ligustrum  amurense  (d)  (1) 
 lucidum  (sd)  (3) 
 ovalifoliura  (d)  (4)  ** 
 ovalifolium  aureum  (d)  (1) 
 Lithospermum  sp.  (d)  (2) 
 Lobelia  cardinalis  (d)  (2) 
 Lonicera  f ragrantissima  (d)  (4)  * 
 japonica  chinensis  (d)  (2) 
 magnifolia  (d)  (2) 
 nitida  (sd)  (3) 
 periclymenum  belgica  (d)  (2) 
 pileata  (sd)  (3) 
 tatarica  punicea  (d)  (3)  * 
 Magnolia  kobus  (sd)  (3)  * 
 
 soulangeana  (sd)  (3)  * 
 stellata  (sd)  (3)  * 
 Miscanthus  sinensis  zebrinus  (d)  (2) 
 Monarda  didyma  splendens  (d)  (2) 
 Myosotis  palustris  semperflorens  (d)  (2) 
 Nandina  domestica  (sd)  (3)  * 
 Nepeta  sp.  (d)  (2) 
 Nephrolepis  exaltata  bostoniensis  (g)  (7) 
 
 trevillian  (g)  (3) 
 Ophiopogon  jaburan  aureus  variegatus  (d)  (1) 
 Opuntia  (see  Cactus) 
 Orange  (see  Citrus) 
 Oriental  poppy  (see  Papaver) 
 Oxydendron  arboreum  (sd)  (3)  * 
 Pachysandra  terminalis  (d)  (3) 
 Paeonia  sp.  (d)  (2) 
 
 rubra  (d)  (3) 
 Palm  (see  Howea  and  Phoenix) 
 Papaver  orientale  (d)  (4) 
 Parthenocissus  quinquefolia  (d)  (3)  * 
 robusta  (d)  (2) 
 triscuspidata  lowii  (d)  (2) 
 tricuspidata  veitchii  (d)  (2) 
 
-  11  - 
 
 List  No.  1  (continued) 
 
 Pelargonium  zonale  (g)  (2) 
 Peony  (see  Paeonia) 
 Peperomia  argyrea  (g)  (1) 
 maculosa  (g)  (2) 
 obtusifolia  (g)  (6) 
 Philadelphus  grandiflorus  (d)  (1) 
 laxus  (d)  (3)  ** 
 nivalis:  Snowbank  (d)  (1) 
 Philodendron  dubium  (g)  (1) 
 
 dubium:  Silver  Sheen  (g)  (1) 
 (N.B.   Several  varieties  of  Philodendron  severely  injured 
 (see  list  No.  2).   Fumigation  of  this  genus  inadvisable 
 pending  additional  information.) 
 Phlox  sp.  (d)  (6) 
 
 subulata  alba  (d)  (2) 
 Phoenix  roebelenii  (g)  (6) 
 Physocarpus  opulifolius  (d)  (1) 
 Physostegia  virginiana:  Vivid  (d)  (2) 
 Pieris  floribunda  (d)  (2) 
 
 japonica  (sd)  (3) 
 Platanus  orientalis  (d)  (3)  * 
 Poinsettia  pulcherrima  (g)  (5) 
 
 pulcherriraa:  Mrs.  Paul  Ecke  (g)  (1) 
 pulcherrima:  Oak  Leaf  (g)  (2) 
 Polygonum  auberti  (d)  (2) 
 Polypodium  aureura  mandaianum  (g)  (1) 
 Pothos  wilcoxii  (g)  (1) 
 Primula  sp.  (d)  (8) 
 
 malacoides  (g)  (2) 
 veris  (d)  (2) 
 Pteris  alexandrae  (g)  (1) 
 
 cretica  rivertoniana  (g)  (1) 
 cretica  wilsoni  (g)  (1) 
 cretica  wimsetti  (g)  (1) 
 ensiformis  victoriae  (g)  (1) 
 Pyracantha  angustifolia  (sd)  (3) 
 
 coccinea  lalandii  (sd)  (5) 
 Pyrethrum  (Painted  Daisy)  (see  Chrysanthemum  coccineum) 
 Quercus  alba  (d)  (3) 
 Retinospora  (see  Chamaecyparis) 
 Rhododendron  (listed  by  hort.  var.  names) 
 Album  Elegans  (d)  (1) 
 Boule  de  Neige  (sd)  (3) 
 Caractacus  (d)  (1) 
 carolinianum  (sd)  (3)  * 
 Charles  Bagley  (d)  (2) 
 Charles  Dickens  (d)  (1) 
 F.  D.  Goodman  (d)  (1) 
 Hyle  seedling  (d)  (1) 
 
List  No.  1  (continued) 
 
 -  12  - 
 
 Rhododendron  (continued) 
 
 Ignatius  Sargent  (d)  (1) 
 James  Macintosh  (d)  (1) 
 Mrs.  Charles  Sargent  (d)  (1) 
 Old  Port  (d)  (1) 
 Purpureum  (d)  (1) 
 Purpureum  Elegans  (d)  (1) 
 Snow  White  (Album  Novum)  (d)  (1) 
 Rhodotypus  kerrioides  (d)  (1) 
 Rhus  aromatica  (d)  (3) 
 Rosa  (listed  by  hort.  var.  names) 
 Miss  Edith  Cavell  (d)  (2) 
 Mrs.  Henry  Bowies  (d)  (2) 
 Ville  de  Paris  (d)  (2) 
 wichuraiana  (d)  (3) 
 Rudbeckia  laciniata  hortensia  (d)  (1) 
 Saintpaulia:  hybrid  Blue  Boy  (g)  (4) 
 Salix  discolor  (pussy  willow)  (d)  (1) 
 Sansevieria  laurentii  (g)  (4) 
 Sedum  sieboldii  (d)  (2) 
 
 spectabile:  Brilliant  (d)  (1) 
 stoloniferum  coccineum  (d)  (1) 
 Selaginella  emmeliana  (g)  (4) 
 
 braunii  (g)  (2) 
 Sempervivum  calcarum  (g)  (2) 
 
 globiferum  (d)  (2) 
 Sitolobium  (see  Dennstaedtia) 
 Spirea  astilbe  (see  Astilbe) 
 
 bumalda:  Anthony  Waterer  (d)  (3) 
 cantoniensis  (d)  (3)  ** 
 reevesiana  (see  S.  cantoniensis) 
 richmensis  (d)  (1) 
 rulandi  (d)  (1) 
 thunbergi  (d)  (1) 
 vanhouttei  (d)  (4) 
 Statice  armeria  alba  (d)  (2) 
 Stephanandra  flexuosa  (d)  (1) 
 Stokesia  lilacina  grandiflora  (d)  (1) 
 Stranvaesia  davidiana  (sd)  (3) 
 
 davidiana  undulata  (sd)  (3) 
 Symphoricarpus  albus  (d)  (4) 
 
 chenaultii  (d)  (4)  ** 
 orbiculatus  (d)  (1) 
 racemosus  (see  S.  albus) 
 vulgaris  (see  S.  orbiculatus) 
 Syringa  vulgaris  (d)  (3)  * 
 
 vulgaris:  hybrid  Wm.  Robinson  (d)  {3] 
 Tamarix  africana  (d)  (1) 
 Tarragon  (see  Artemisia) 
 
-  13  - 
 List  No.  1  (continued) 
 
 Taxus  baccata  erecta  (d)  (6) 
 
 baccata  repandens  (d)  (3) 
 cuspidata  nana  (d)  (3) 
 cuspidata  thayeri  (d)  (3) 
 Teucrium  sp.  (d)  (2) 
 
 chamaedrys  (d)  (3) 
 Thuja  occidentalis  ellwangeriana  (d)  (3) 
 occidentalis  fastigiata  (d)  (3) 
 occidentalis  globosa  (d)  (1) 
 occidentalis  hoveyi  (d)  (3) 
 occidentalis  pyramidalis  (see  fastigiata) 
 occidentalis  robusta  (d)  (3) 
 occidentalis  rosenthalii  (d)  (3) 
 occidentalis  vervaeneana  (d)  (3) 
 occidentalis  wareana  (see  robusta) 
 orientalis  bakeri  (biota)  (d)  (1) 
 orientalis  bonita  (biota)  (d)  (1) 
 orientalis  compacta  (biota)  (d)  (3) 
 Thymus  serpyllum  coccineus  (d)  (2) 
 Tritoma  (see  Kniphofia  uvaria  grandis) 
 TroHius  europaeus  supertus  (d)  (1) 
 Tsuga  canadensis  (d)  (4) 
 Tunica  saxifraga  (d)  (2) 
 Veronica:  hybrid  Blue  Spire  (d)  (1) 
 
 spicata  (d)  (2) 
 Viburnum  americanum  (see  trilobum) 
 bitchiuense  (sd)  (3) 
 dentatum  (d)  (1) 
 lantana  (d)  (6)  * 
 molle  (d)  (3)  * 
 opulus  (d)  (1) 
 rhytidophyllum  (d)  (3)  * 
 tomentosum  plenum  (d)  (3)  * 
 trilobum  (d)  (3)  * 
 Vinca  minor  (d)  (6) 
 Viola  cornuta:  Jersey  Gem  (d)  (2) 
 
 odorata:  Gov.  Herrick  (d)  (1) 
 Vitex  macrophylla  (d)  (3) 
 
 ViLis  rhombifolia  and  V.  striata  (see  Cissus) 
 Weigela  (see  Diervilla) 
 Wisteria  floribunda  (d)  (2) 
 
 multijuga  alba  (d)  (3) 
 multijuga  rosea  (d)  (2) 
 sinensis  alba  (d)  (2) 
 Zygocactus  truncatus  (g)  (2) 
 
Ilin  IMl,n.m'7.,^  OF  FLORIDA 
 
 _     14    -  „ ,„„„„,.,„ 
 
 3  1262  09236  6896 
 
 List  No.  2. — Plants  fumigated  experimentally  with  methyl  bromide  with 
 resulting  injury  or  suspected  injury. 
 
 Abelia  grandiflora  (sd)  (7)  (severe  leaf  injury  in  2  tests;  all  plants 
 
 recovered) 
 Aglaonema  sinensis  (g)  (1)  (slight  burn  of  leaf  margins) 
 Aspidistra  lurida  (g)  (3)  (plant  in  1  test  unhealthy;  some  dead  leaves) 
 Azalea  (listed  by  hort.  var.  names) 
 
 Coral  Bells  (g)  (37)  (majority  killed,  balance  severely  injured) 
 Salmon  Beauty  (g)  (27)  (majority  killed,  balance  severely  injured) 
 Billbergia  alberti  (g)  (1)  (plant  died  several  v/eeks  after  treatment) 
 
 nutans  (g)  (1)  (plant  died) 
 C'aladium:  Our  Red  (g)  (1)  (all  leaves  died,  possibly  from  post-fumigation 
 
 care;  good  recovery) 
 Calathea  vandenheckei  (g)  (1)  (slight  burn  of  leaf  margins) 
 Capsicum  sp.  (g)  (1)  (plant  died) 
 Chamaecyparis  pisifeia  aurea  (d)  (3)  (tips  of  branches  severely  injured) 
 
 pisifera  filifei'a  (d)  (3)  (tips  of  branches  severely  injured) 
 pisifera  filifera  aurea  (d)  (3)  (same  as  above) 
 plumosa  lutescens  (d)  (3)         (same  as  above) 
 Cibotium  schiedei  (g)  (7)  (all  show  severe  injury  to  a  few  old  leaves) 
 Cordyline  terminalis  (g)  (1)  (outer  leaves  killed,  recovered) 
 Crassula  arborescens  (g)  (8)  (plants  dropped  most  of  leaves;  good  recovery) 
 Ficus  pandurata  (g)  (3)  (one  killed,  one  severely  injured) 
 Howea  forsteriana  (g)  (9)  (slight  injury,  a  few  old  leaves  killed) 
 Juniperus  japonica  (d)  (3)  (2  plants  with  severe  and  1  with  slight  tip  injury) 
 
 sylvestris  (d)  (3)  (severe  injury,  all  needles  killed) 
 Maranta  (see  also  Calathea) 
 
 leuconeura  kerchoveana  (g)  (2)  (a  few  old  leaves  killed,  recovered) 
 Monstera  deliciosa  (g)  (5)  (plants  killed  and  severely  injured;  injured 
 
 recovering) 
 Nephthytis  afzelii  (g)  (2)  (severe  injury,  lower  leaves  killed;  recovered) 
 liberica  (g)  (2) (severe  injury,  lower  leaves  killed;  recovered) 
 Fandanus  veitchii  (g)  (9)  (severe  injury,  most  leaves  killed;  new  suckers 
 
 vigorous  on  some) 
 Philodendron  cordatum  (g)  (10)  (severe  Injury;  most  marked  in  smallest 
 
 pots,  2j   inches) 
 pertussum  (see  Monstera  deliciosa) 
 scandens  (g)  (1)  (slight  injury  to  leaves) 
 Pinus  bungeana  (sd)  (3)  (severe  needle  burn  and  drop;  good  recovery) 
 Sedum  adolphii  (g)  (3)  (severe  injury  to  leaves  and  terminal  buds) 
 Strelitzia  reginae  (g)  (2)  (several  old  leaves  killed) 
 Thuja  plicata  atrovirens  (d)  (3)  (all  show  winter  injury,  slightly  more  m.arked 
 
 in  fumigated  than  in  controls) 
 Tsuga  canadensis  pendula  (sd)  (3)  (slight  burn  of  needle  tips) 
 sargenti  (see  T.  canadensis  pendula)