California Code of Regulations › Title 14 - Natural Resources › Division 1.5 - Department of Forestry and Fire Protection › Chapter 4 - Forest Practices › Subchapter 5 - Northern Forest District Rules › Article 7 - Hazard Reduction › Appendix - Appendix

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
BOARD OF FORESTRY TECHNICAL RULE ADDENDUM NO. 3BROOD
						MATERIAL
A. Hazard Determination
Tree mortality and top killing result when Ips beetle
						populations reproduce and increase in pine brood
						material1 and then leave this material and attack
						pines in the residual stand. Hazard increases with the amount of pine brood
						material present.
Any suitable breeding material, including pine logs from
						recently felled trees, represents a hazard as long as it remains on site long
						enough for the beetles to complete a life cycle in it. During suitable weather,
						the life cycle may be as short as five weeks. Piling of brood material is more
						hazardous than leaving it spread-out on the ground.
Timing of brood material production may influence hazard.
						Hazard is presumed to be highest when pine brood material is produced from
						February through June and moderate when produced at other times of the year. At
						no time is hazard presumed to be low. In some parts of the Southern Forest
						District, hazard is presumed to be high year round, regardless of when the
						brood material was produced.
Age, size, and species of residual trees influence
						hazard. Young pole size stands of pine are most susceptible to damage. Tree
						species other than pine are not damaged by insects that breed in pine brood
						material. Brood material from tree species other than pine generally does not
						contribute to the build-up of damaging beetle populations.
Low vigor residual trees are at greatest risk.
						Historically, drought stressed, suppressed, and overstocked stands have been
						identified as high risk. Off-site, diseased, damaged, and overmature trees are
						also at risk.
If damaging insect populations are high, hazard will be
						greater. High beetle populations have the potential to damage more than just
						low vigor trees. Chronic pine mortality in the area should be evaluated to
						determine if high beetle populations are present. An established Zone of
						Infestation for pine bark beetles implies that conditions are appropriate for
						the build-up of beetle populations.
Potential for the spread of damaging insects to adjacent
						ownerships should be considered. The closer the ownership, the greater the
						risk. Generally, ownerships beyond one quarter of a mile will have little or no
						risk.
Value of residual trees should be considered. How much
						loss to residuals is acceptable?
B. Hazard Reduction Treatment Alternatives
Any treatment to reduce hazard should apply to the entire
						area where a hazard has been determined to exist, including the area where
						lopping for fire hazard reduction has been used. Treatment alternatives include
						modification of the brood material so that it is less suitable as a breeding
						site for beetles or methods to reduce beetle populations that have
						developed.
Specific Treatment Alternatives
applied
						to pine brood material are as follows:
(1) The following treatments are acceptable provided they
						are completed before insect broods emerge from infested material. During
						weather that is suitable for brood development, a five week window is the
						maximum time that should elapse between creation of brood material and its
						treatment by one of the following methods: brood material can be removed from
						the site for processing or disposal; if left on-site, it can be piled and
						burned, chipped, debarked, treated with an appropriate pesticide, or piled and
						covered with clear plastic. If brood material is piled and covered, the plastic
						used must be a minimum of 6 mil thick; piles must be completely sealed by the
						plastic so that there are no openings to the outside and remain covered for 6
						months (or 4 months if at least 2 summer months are included).
(2) The following treatment is acceptable, provided it is
						completed as soon after brood material creation as is practical, but not later
						than one week. Lop all branches from the sides and tops of those portions of
						main stems which are 3" or more in diameter. Branches shall be scattered so
						that stems have maximum exposure to solar radiation. Do not pile brood
						material. Lopped stems could also be cut into short segments to decrease drying
						time and further reduce hazard.
(3) Burying brood material will prevent it from being
						colonized by beetles, but may not prevent emergence of the beetles. Therefore,
						it must be buried before becoming infested. During suitable weather, brood
						material must be buried concurrent with its creation.
__________
1 "Suitable" weather depends
						upon location. In areas that receive snowfall, suitable weather generally
						exists from April 15-October 15. In other areas, suitable weather exists from
						March 1-November 30.
1. New
						Appendix filed 8-5-91; operative 8-5-91 (Register 91, No. 50).
2.
						Editorial correction inserting inadvertently omitted Appendix A and adding
						HISTORY 1 (Register 96, No. 50).
Note: Authority cited: Sections
						  4551
						  and
						  4551.5,
						  Public Resources Code. Reference: Sections
						  4512,
						  4513,
						  and
						  4713,
						  Public Resources Code.