April 2021 - 25

Seed Pro Inc.
Daniel Corey Farms
Monticello, ME
Reds * Yellows * Whites
Russets * Chips * Specialty
Varieties
Herbicides being sprinkler-incorporated. They had just been applied right after hilling
(reservoir tillage and hilling combined Trade name Dammer Diker).
populations might not be controlled
with tillage only, or perhaps the field
was fall-bedded. Another scenario for
using burndown herbicides could be
excess rainfall preventing timely preplant
tillage. Applying one or more of
these herbicides to actively growing
weeds before spring tillage can provide
that control. These herbicides can also
be used for burndown after planting
but must be applied before
potato
emergence because they can kill already
emerged potatoes and reduce yields.
The PRE. PRE herbicides with soil
activity are shown in the first column
of Table 1. They must be applied before
potato emergence and incorporated into
the soil by sprinkler irrigation or rainfall.
For some, mechanical incorporation is
labeled but usually as a last resort if the
first two are not an option. Three of these
herbicides - Chateau, Linex/Lorox and
sulfentrazone - also have foliar activity
and can control some emerged weeds.
However, although safe to potatoes that
have not yet emerged, these herbicides
can kill emerged potatoes.
Herbicides with soil activity only, but
safe to emerged potatoes are shown in
the second column of Table 1 and can
be applied PRE or POST. One of the
advantages for using these soil activeonly
herbicides
POST is
to extend
control of weeds which have not yet
emerged further into the season.
Matrix and metribuzin are versatile
in that they have both soil and foliar
activity and can be applied PRE and/or
POST (Table 1, third column). Follow
the labels for recommended adjuvants
at the POST timing.
Size of emerged weeds. In general,
Matrix and metribuzin applied to
emerged weeds can provide good,
season-long control. Poor control can
occur, however, if the weeds are greater
than 2 inches tall at application time.
The POST.
Grass
control-only
herbicides labeled for use in potatoes
are Post and Select (Table 1, fourth
column). Size of grasses at application
time is also critical but depending upon
species, might not necessarily need to be
less than 2 inches to be effective. Read
the label for more specific information.
Tank-mix, and/or if labeled, sequentially
(PRE+POST
apply
herbicides
only
apply
or
POST+POST) for weed control in
potatoes. Do not
one
herbicide or apply herbicides with only
one site of action (SOA) in the growing
season, even in the rare instance of a
field with only one weed species. Also
referred to as target site or mechanism
of action, SOA is the specific protein or
biochemical site in a plant to which the
AC Chaleur
Adirondack Red
All Blue
Andover
Atlantic
B2727-2
Belmonda
Bora Valley
Brodie (NY140)
Caribou Russet
Dark Red Norland
Elba
Envol
French Fingerling
Genesse
German Butterball
Harley Blackwell
Huron Chipper
Innovator
Katahdin
Kennebec
Kueka Gold
Lamoka
Lehigh
Natascha
Norwis (Crystal Strain)
Ontario
Peter Wilcox
Pike
Prada
Purple Majesty
Reba
Red LaSoda
Red Maria
Red Pontiac
Red Thumb Fingerling
Russet Burbank (ID Strain)
Salem
Satina
Sebec
Shepody
Snowden
Strawberry Paw
Superior
Toscana
Waneta
Yukon Gem
Yukon Gold
Tissue Culture Facility
Mini-tubers
Early Generation Seed
Office: 207-538-4405
Daniel Corey
207-532-0096
daniel@seedproinc.com
Sara Corey Parker - Sales
207-538-6430
sara@seedproinc.com
seedproinc.com
Spudman * April 2021
25
http://www.seedproinc.com
April 2021

Table of Contents for the Digital Edition of April 2021
