[Code of Federal Regulations] [Title 7, Volume 5] [Revised as of January 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 7CFR301.50-10] [Page 41] TITLE 7--AGRICULTURE CHAPTER III--ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE PART 301_DOMESTIC QUARANTINE NOTICES--Table of Contents Subpart_Pine Shoot Beetle Sec. 301.50-10 Treatments. (a) Fumigation is authorized for use on pine logs with bark attached, pine lumber with bark attached, pine bark nuggets (including bark chips), and pine stumps, as follows: Logs, lumber, and stumps may be treated with methyl bromide at normal atmospheric pressure with 48 g/ m3 (3 lb/1000 ft3) for 16 hours at 21 [deg]C (70 [deg]F) or above, or 80 g/m3 (5 lb/1000 ft3) for 16 hours at 4.5 - 20.5 [deg]C (40 - 69 [deg]F.). (b) Cold treatment is authorized for cut pine Christmas trees, pine nursery stock, and raw pine materials for pine wreaths and garlands as follows: The regulated articles must be loaded into a refrigeration unit and held at -20.6 [deg]C (-5 [deg]F) for one hour; the period before the refrigeration unit reaches the specified temperature is not part of the treatment period. (c) Any one of these fumigation treatments is authorized for use on cut pine Christmas trees and raw pine materials for pine wreaths and garlands. Cut pine Christmas trees and raw pine materials for pine wreaths and garlands may be treated with methyl bromide at normal atmospheric pressure as follows: ---------------------------------------------------------------------------------------------------------------- Dosage: Concentration readings: ounces per 1000 pounds per Exposure: feet \3\ Temperature 1000 feet hours ------------------------------------------- \3\ 2.0 hr 3.0 hr 3.5 hr 4.0 hr ---------------------------------------------------------------------------------------------------------------- 40-49 [deg]F................................ 4.0 4.0 57 -- -- 48 50-59 [deg]F................................ 4.0 3.5 57 -- 48 -- 50-59 [deg]F................................ 3.5 4.0 50 -- -- 42 60 [deg]F+.................................. 4.0 3.0 57 48 -- -- 60 [deg]F+.................................. 3.0 4.0 43 -- -- 36 ---------------------------------------------------------------------------------------------------------------- Note: APHIS assumes no responsibility for damage to cut pine Christmas trees due to possible phytotoxic effects of these treatments. Trees should be cut at least 14 days before treatment to reduce the possibility of phytotoxic effects. [57 FR 54496, Nov. 19, 1992, as amended at 58 FR 6348, Jan. 28, 1993; 58 FR 28335, May 13, 1993; 58 FR 63027, Nov. 30, 1993; 60 FR 55780, 55781, Nov. 3, 1995; 65 FR 51518, Aug. 24, 2000]