strategies for avoiding pollinator/herbicide interactions · slideshow presentation on strategies...
TRANSCRIPT
KING COUNTY
NOXIOUS
WEED
CONTROL
PROGRAM
STRATEGIES FOR AVOIDING
POLLINATOR / HERBICIDE
INTERACTION
KING COUNT Y NOXIOUS WEED CONTROL BOARD
POLICY ON
NOXIOUS WEED CONTROL AND BEES
“In partnership with the Washington State Noxious Weed Control Board, we have adopted practices to minimize impacts to bees and other native pollinators, while continuing to fulfill our obligations in King County.”
Through Best Management Practices and Integrated Pest Management we are able to perform our work with respect to pollinators and still reach our goals for control
PC
: R
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Bu
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Timing is everything!
“…the KCNWCP will make every reasonable effort to schedule control work so that it will minimize potential interaction with bees. As such, staff members will make every reasonable effort to avoid contact with pollinators where flowering plants are located and will schedule treatments during non-flowering periods and during times when the bees will not be active.”
KING COUNT Y NOXIOUS WEED CONTROL BOARD
POLICY ON
NOXIOUS WEED CONTROL AND BEES
1st year knotweed treatment at Snoqualmie Falls.
KCNWCP crew member applies foliar spray late in the
season after flowering.
PC: Justin Brooks
Control and Replace!
“…the KCNWCP is committed to working closely with landowners in project areas to re-establish desirable native and non-invasive plant species to replace the controlled noxious weeds. These non-invasive and native species offer an alternative pollen and nectar source that are not harmful, state regulated noxious weeds. These replacement species offer substantial benefits for bees and pollinators and also benefit water quality, fish and wildlife—whereas invasive noxious weeds do not .”
KING COUNT Y NOXIOUS WEED CONTROL BOARD
POLICY ON
NOXIOUS WEED CONTROL AND BEES
PC
: m
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s.o
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I n t h e 2 016 S ea so n ,
2 . 5 r i ve r m i les o f n ew p ro jec t a r ea wer e a d d ed to t h e Up p er S n o . A va r ie t y o f m a n a g em en t s t r a teg ies wer e em p loyed to a l l ev ia te p o l l i n a to r/ h e r b i c id e i n te r a c t io n o n f l ower in g s t a n d s o f k n o t weed .
L e f t : E a r t h C o r p sc r ew sk ip s t h ro u g h f lower ing k n o t weed a n d m a kes t h e i r way to sp r ay veg et a t i ve k n o t weed u p s t r ea m .
UPPER
SNOQUALMIE
RIVER
KNOT WEED
PROJECT
Histor ic par ts of the pro ject area were sur vey/t reated dur ing peak f lower ing .
Lef t : KCNWCP crew member t reats vegetat i ve knotweed on the South Fork Snoqualmie River.
UPPER
SNOQUALMIE
RIVER
KNOT WEED
PROJECT
Toward the end of the summer we had t reated a l l h is tor ic par ts of the pro ject area and needed to move into in i t ia l t reatment areas that s t i l l had f lowers present .
Lef t : Ho l low stem in ject ion can be used whi le po l l inators are act ive on f lowers .
UPPER
SNOQUALMIE
RIVER
KNOT WEED
PROJECT
Once f lower ing was a lmost over, c rews would spray knotweed in the ear ly morning and switch to in ject ion dur ing the heat of the day when pol l inators were most act ive .
Lef t : KCNWCP crew member t reats knotweed f rom the unders ide of the canopy, prevent ing spray f rom get t ing on f lowers .
UPPER
SNOQUALMIE
RIVER
KNOT WEED
PROJECT
Once f lower ing
was complete
we were able to
f in ish the f inal
st retch of the
new pro ject
area before the
f i r s t f rost !
Lef t : KCNWCP
crew member
sprays
knotweed af ter
f lowers have
fa l len of f .
UPPER
SNOQUALMIE
RIVER
KNOT WEED
PROJECT
Af ter a s i te has been in t reatment for at least three years , i t is a potent ia l candidate for nat ive p lant restorat ion.
Lef t : Restorat ion p lant ing s i te at O la l l ie State Park on the South Fork Snoqualmie River. Insta l la t ion by Mounta ins to Sound Greenway Trust in 2011 .
UPPER
SNOQUALMIE
RIVER
KNOT WEED
PROJECT
STRATEGIES FOR AVOIDING
POLLINATOR / HERBICIDE INTERACTION
SUMMARY
Low Toxicity
Herbicides
Choose an herbicide that is most effective at controlling the target noxious weed, while exhibiting the lowest risk and toxicity characteristics
Timing
Schedule foliar application when flowers are not present or pollinators are not actively
foraging. Hollow stem injection may also be used
during flowering periods
Replace Noxious Weeds
with Native Plants
Replace invasive weeds with desirable vegetation that meets the needs of foraging pollinators