LIBRARY  \ 
 STATE  PLANT  BOARD 
 
 UNITED  STATES  DEPARTMEKT  0!  AGBXCU1TUEE 
 Bureau  of  Entomology  and  Plant  Quarantine 
 Washington,  D.  C. 
 
 !.P.Q. —  k8$  January  28, 
 
 Sec.  301.72-^a— Adr-.inistrative  Instructions  - 
 lifying  white-fringed  beetle  quarantine 
 regulations  authorizing  treatment  of  potting 
 
 s  o  i  1 
 
 Recent  experimental  work  by  the  Bureau  of  Entomology  and  Plant 
 Quarantine  of  the  U.  3.  Department  of  Agriculture  has  or  ved  that 
 potting  soil  can  "be  successfully  treated  by   T/r.e    fol]        thods  for 
 the  control  of  the  white-fringed  beetle. 
 
 TREATMENT  AU3 
 
 Under  provisions  contained  in  Regulation  5(j=)(Sec.  3C  1.72-5) 
 supplemental  to  Notice  of  ty»arantin<    .   '  (Sec.  3OI.72),  the  Chief 
 of  the  Bureau  of  Entomology  and  Plant  (jfljaranti  le  authorizes,  as  a 
 prerequisite  to  certification,  cither  of  the  following  ethods  nf 
 treatment  for  "potting  soil"  when  arnc  under  tne  o-i^-rvision  of  an 
 authorized  inspector  of  the  U.  3.  Depart  lent  .1   Agriculfr  1 
 
 FUMIGATI  :.  TRM 
 
 (1)  Potting  soil  rust  be  treated  in  0.  thyl 
 bromioe  in  a  dosage  of  kO   cubic  centimeters                 per 
 cubic  yard  of  soil  for  a  period  of  US  hours. 
 
 (2)  The  sides,  bottom,  and  seams  f  th  c  titainer 
 rably  lined  with  on-  et  raeta]  ,  and  shal  I  hi 
 
 be  covered  with  a  I      In  immediately  after 
 
 (3)  The  c-'iait.  il  and  tile  apparal 
 method  of  application  of  the  f-a:  r  v 
 authorizes  i.ionect  >r  ;f  the  U.  3.  2 
 
 HEAT 
 
 (l)      *  ive    steam,   un..  ;are 
 
 inch,    shall    be   applied   thr 
 
 sterili^: 
 a  period     f  U5  pera- 
 
 . 
 
2  - 
 
 UNIVERSITY  OF  FLORIDA 
 
 i  nun  him 
 
 3  1262  09311  5318 
 
 (2)  The  grids  shall  "be  constructed  of  1-inch  pipes,  perforated 
 with  holes  l/32  inch  in  diar.eter  on  the  upper  side  and  connecting  at 
 one  end  to  a  manifold  into  which  the  steam  is  introduced. 
 
 (3)  The  layer  of  soil  in  the  sterilizing  "box  shall  not  be  more 
 than  2  feet ,  6  inches  deep. 
 
 DISCLAIMER 
 
 In  authorizing  the  movement  of  potting  soil  treated  according  to 
 the  requirements  stated  above,  it  is  understood  that  no  liability  shall 
 attach  either  to  the  U.  S.  Department  of  Agriculture  or  to  any  of  its 
 employees  in  the  event  of  injury  resulting  from  the  use  of  these  t 
 ments. 
 
 CAUTION 
 
 Methyl  bromide  is  a  gas  at  ordinary  temperatures.   It  is  color- 
 less and  practically  odorless  in  concentrations  used  for  fumigation  of 
 
 plants.   It  is  a  poison,  and  the  operator  should  use  an  approved  gas 
 mask  when  exposed  to  the  gas  at  concentrations  used  in  fumigation. 
 
 After  fumigation  of  potting  soil  by  the  above  method,  the  cover 
 should  be  removed  and  the  soil  allowed  to  aerate. 
 
 (Sec.  301.72-<5a)  /B.S.P.Q.— US9 ,  January  28,  1939^7   " 
 
 LEE  A.  STRONG 
 phie.C. - JBureau  of  Entomology  and  Flant  Quarantine.