Chapter 3 Utility Pruning Flashcards
Utility pruning is the pruning of trees located in the vicinity of power lines for the purpose of __________ __________ __________.
Utility pruning is the pruning of trees located in the vicinity of power lines for the purpose of __________ __________ __________.
ensuring reliable service
Which type of cuts are less unacceptable?
Which type of cuts are less unacceptable? internodal cuts (e.g. topping)
Which type of cuts are more acceptable?
Which type of cuts are more acceptable?
nodal cuts
(e.g. drop-crotch, thinning)
Where should the final cut be made for proper utility pruning?
Where should the final cut be made for proper utility pruning?
just outside of the branch bark ridge and the branch collar
Flush cuts damage which tissues?
Flush cuts damage which tissues?
the trunk
Why is utility pruning done?
Why is utility pruning done?
to maintain safety and rights-of-way
Which type of pruning encourages the growth of branches away from the wires?
Which type of pruning encourages the growth of branches away from the wires?
directional pruning
What is the maximum amount of foliage that should be removed in one growing season?
What is the maximum amount of foliage that should be removed in one growing season?
25%
(this is according to ANSI A300)
When is it acceptable to deviate from the pruning standards?
When is it acceptable to deviate from the pruning standards?
during storm restoration
In the U.S., pruning should be conducted according to __________ __________.
In the U.S., pruning should be conducted according to __________ __________.
ANSI A300
Utility pruning removes the leaves and reduces a tree’s __________ growth, but remaining __________ may grow more.
Utility pruning removes the leaves and reduces a tree’s __________ growth, but remaining __________ may grow more.
overall;
shoots
Utility pruning is mainly conducted to provide __________ from power lines.
Utility pruning is mainly conducted to provide __________ from power lines.
clearance
Utility pruning should use __________ & __________ pruning principals
Utility pruning should use __________ & __________ pruning principals
natural & targeted
Utility pruning should use __________ & __________ pruning principals
Utility pruning should use __________ & __________ pruning principals
natural & targeted
Crown reduction removes main branches to lower limbs no less than __________ the diameter of the original limb.
Crown reduction removes main branches to lower limbs no less than __________ the diameter of the original limb.
1/3
When pruning near conductors, overhanging branches can be left in place, depending on __________ __________ & __________ __________.
When pruning near conductors, overhanging branches can be left in place, depending on __________ __________ & __________ __________.
tree species & climate conditions
A pruning cycle should be based on tree __________ __________.
A pruning cycle should be based on tree __________ __________.
growth rates
__________ __________ __________ can be used to reduce growth and lengthen time between cycles.
__________ __________ __________ can be used to reduce growth and lengthen time between cycles.
tree growth regulators
Which pruning style is most effective in preventing regrowth when pruning hardwoods?
Which pruning style is most effective in preventing regrowth when pruning hardwoods?
crown reduction
True or False?
Wound dressings in most situations are effective in reducing decay, accelerating wound closure & preventing disease penetration.
false
True or False?
Wound dressings in most situations are effective in reducing decay, accelerating wound closure & preventing disease penetration.
false
wound dressings are not effective in most situations
When is it okay to use wound dressings?
When is it okay to use wound dressings?
when such treatments are known to be effective (e.g. pruning oaks when/where they are susceptible to oak wilt)
Sprout growth following pruning usually comes from __________ __________.
Sprout growth following pruning usually comes from __________ __________.
adventitious buds
Clearance for decurrent hardwoods growing directly under conductors is best obtained by __________ __________.
Clearance for decurrent hardwoods growing directly under conductors is best obtained by __________ __________.
crown reduction
Excurrent trees:
Excurrent trees:
one main leader
(e.g. pines, spruce)
Decurrent trees:
Decurrent trees:
multiple leaders
(e.g. hardwoods)
A model for the production of reaction zones
A model for the production of reaction zones
Compartmentalization of Decay in Trees
(CODIT)
British Standards Institute Recommendations for Tree Work
British Standards Institute Recommendations for Tree Work
BS3998
An interruption in the flow of electricity that could lead to fire or an outage
An interruption in the flow of electricity that could lead to fire or an outage
electrical shorts
