April 2021 - 27

All herbicides labeled for weed control
during the growing season can be used for
this PRE hilling-herbicide combination.
Drag-off before potato emergence +
hilling and herbicide application POST
after potato emergence. Some growers
use a harrow or other implements to
drag-off before potato emergence. The
harrow levels the field and can take out
emerged weeds. Hilling takes place after
potato emergence followed by herbicide
application and, where appropriate,
sprinkler/rain incorporation.
The
advantage to
this
post
emergence tillage-herbicide application
combination is that the POST herbicide
application could allow weed control
further into the season than when
the herbicides are applied PRE. The
disadvantage is that weeds might
emerge before potato emergence and
be too large to be effectively controlled
by hilling after potato emergence.
Hilling takes place after
potato emergence
followed by herbicide
application and, where
appropriate, sprinkler/
rain incorporation.
In that case, a foliar active herbicide
must be included in the tank mix,
however, weeds may also be too large
for those herbicides to work effectively.
Application of a foliar active herbicide
before potato emergence when weeds
are less than 2 inches might be necessary.
Choice of herbicides is limited to those
safe to emerged potatoes. Remember
that Matrix and metribuzin are the only
potato herbicides with foliar activity on
emerged broadleaf weeds that can be
applied after potato emergence.
PRE hilling and a planned POST
herbicide application. If weeds have
already emerged, a foliar-active herbicide
must be included in the tank mixture
and as mentioned, emerged weeds must
be less than 2 inches tall at the time of
the POST herbicide application.
POST " rescue " herbicide applications
might be needed in any of these
combination scenarios.
Here's to a happy and weed-free 2021.
More information can be found at
pnwhandbooks.org/weed/agronomic/
potato.
Remember: Always read and follow
labels!
- Pamela J.S. Hutchinson is an
associate professor, Extension specialist
and potato cropping systems weed scientist
at the University of Idaho in Aberdeen.
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Spudman * April 2021
27
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April 2021

Table of Contents for the Digital Edition of April 2021

April 2021 - 1
April 2021 - 2
April 2021 - 3
April 2021 - 4
April 2021 - 5
April 2021 - 6
April 2021 - 7
April 2021 - 8
April 2021 - 9
April 2021 - 10
April 2021 - 11
April 2021 - 12
April 2021 - 13
April 2021 - 14
April 2021 - 15
April 2021 - 16
April 2021 - 17
April 2021 - 18
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April 2021 - 21
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April 2021 - 23
April 2021 - 24
April 2021 - 25
April 2021 - 26
April 2021 - 27
April 2021 - 28
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April 2021 - 30
April 2021 - 31
April 2021 - 32
April 2021 - 33
April 2021 - 34
April 2021 - 35
April 2021 - 36
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https://www.nxtbook.com/greatamericanmediaservices/SPUD/february-2024
https://www.nxtbook.com/greatamericanmediaservices/SPUD/spudman-january-2024
https://www.nxtbook.com/greatamericanmediaservices/SPUD/spudman-november-december-2023
https://www.nxtbook.com/greatamericanmediaservices/SPUD/spudman-september-october-2023
https://www.nxtbook.com/greatamericanmediaservices/SPUD/spudman-july-august-2023
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https://www.nxtbook.com/greatamericanmediaservices/SPUD/spudman-april-2023
https://www.nxtbook.com/greatamericanmediaservices/SPUD/spudman-march-2023
https://www.nxtbook.com/greatamericanmediaservices/SPUD/spudman-february-2023
https://www.nxtbook.com/greatamericanmediaservices/SPUD/spudman-january-2023
https://www.nxtbook.com/greatamericanmediaservices/SPUD/spudman-november-december-2022
https://www.nxtbook.com/greatamericanmediaservices/SPUD/spudman-september-october-2022
https://www.nxtbook.com/greatamericanmediaservices/SPUD/spudman-july-august-2022
https://www.nxtbook.com/greatamericanmediaservices/SPUD/may-june-2022
https://www.nxtbook.com/greatamericanmediaservices/SPUD/april-2022
https://www.nxtbook.com/greatamericanmediaservices/SPUD/march-2022
https://www.nxtbook.com/greatamericanmediaservices/SPUD/february-2022
https://www.nxtbook.com/greatamericanmediaservices/SPUD/january-2022
https://www.nxtbook.com/greatamericanmediaservices/SPUD/november-december-2021
https://www.nxtbook.com/greatamericanmediaservices/SPUD/september-october-2021
https://www.nxtbook.com/greatamericanmediaservices/SPUD/july-august-2021
https://www.nxtbook.com/greatamericanmediaservices/SPUD/may-june-2021
https://www.nxtbook.com/greatamericanmediaservices/SPUD/april-2021
https://www.nxtbook.com/greatamericanmediaservices/SPUD/march-2021
https://www.nxtbook.com/greatamericanmediaservices/SPUD/february-2021
https://www.nxtbook.com/greatamericanmediaservices/SPUD/january-2021
https://www.nxtbook.com/greatamericanmediaservices/SPUD/november-december-2020
https://www.nxtbook.com/greatamericanmediaservices/SPUD/september-october-2020
https://www.nxtbook.com/greatamericanmediaservices/SPUD/july-august-2020
https://www.nxtbook.com/greatamericanmediaservices/SPUD/may-june-2020
https://www.nxtbook.com/greatamericanmediaservices/SPUD/april-2020
https://www.nxtbook.com/greatamericanmediaservices/SPUD/march-2020
https://www.nxtbook.com/greatamericanmediaservices/SPUD/february-2020
https://www.nxtbook.com/greatamericanmediaservices/SPUD/january-2020
https://www.nxtbook.com/greatamericanmediaservices/SPUD/november-december-2019
https://www.nxtbook.com/greatamericanmediaservices/SPUD/september-october-2019
https://www.nxtbook.com/greatamericanmediaservices/SPUD/july-august-2019
https://www.nxtbook.com/greatamericanmediaservices/SPUD/may-june-2019
https://www.nxtbook.com/greatamericanmediaservices/SPUD/april-2019
https://www.nxtbook.com/greatamericanmediaservices/SPUD/march-2019
https://www.nxtbook.com/greatamericanmediaservices/SPUD/february-2019
https://www.nxtbook.com/greatamericanmediaservices/SPUD/basf-2019
https://www.nxtbook.com/greatamericanmediaservices/SPUD/january-2019
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