Page 56: Chapter 4-Notes on Herbicides

HALOSULFURON

Trade Name: Permit, Sandea.

Chemical Family: Sulfonylurea.

Crop and/or Non-Crop Registrations: Permit- Dry Beans, Field corn (including seed), Sweet Corn, Popcorn, Grain Sorghum. Sandea - includes apples, highbush blueberries, cucumbers, melons, tomatoes, asparagus, snapbeans, squash and other crops, refer to label for crop listing.

Sensitive Weeds: Canada fleabane, Chickweed (common), Cocklebur, Common groundsel, Corn spurry, Creeping yellowcress, Flower-of-an-hour, Fringed (Northern) willowherb, Hairy galinsoga, Horsetail, Jimsonweed, Lamb's-quarters, Plantain, broadleaf, Prickly lettuce, Ragweed (common and giant), Redroot pigweed, Round-leaved mallow, Shepherd's-purse, Smartweed (Lady's-thumb, Pennsylvania), Smooth pigweed, Spiny amaranth, Stinking chamomile, Velvetleaf, Wild mustard, Wild radish and Yellow nutsedge. For certain weeds, activity may be greater as a pre or post emergent treatment. Will not control Group 2 resistant weed populations. Refer to label for application timing and use rate for specific weed control recommendations.

Basis of Selectivity: Metabolized by tolerant species.

Application Methods: Soil applications (Preplant incorporated and preemergent) and postemergent foliar application timings. Refer to label for specific crop staging recommendations.

Residual Activity: Generally will provide 4-6 weeks of control. Length of residual control is dependent on soil and moisture factors, application rate and timing. Refer to label for rotation crop guidelines.

Unique Characteristics: Heavy infestations of nutsedge may require sequential applications. An earlier treatment may be required to prevent nutsedge from competing with the crop. Refer to label for other weeds suppressed. Refer to label for specific crop directions for pre-emergent rates. Refer to label for rotation crop guidelines.

HEXAZINONE

Trade Names: PRONONE, VELPAR.

Chemical Family: Triazine.

Crop and/or Non-Crop Registrations: Christmas trees, coniferous reforestation, non-cropland.

Sensitive Weeds: Most herbaceous broadleaf weeds and grasses including raspberry, bluejoint grass, goldenrod and brome grass; spot applications control aspen, ash, maple, cherry and birch.

Uptake and Translocation: Absorbed through roots and foliage; translocation is primarily upwards through xylem.

Basis of Selectivity: Tolerant species metabolize hexazinone faster than sensitive species. For conifers, at least part of the selectivity is due to the tree roots being deeper than hexazinone leaches into the soil.

Application Methods: For broadcast applications, apply preemergence or as a postemergence foliar spray during active plant growth. For spot applications, use an exact-delivery hand gun applicator to apply undiluted VELPAR as close as possible to the root collar of plants to be controlled; keep spots at least 1 m away from desirable conifers. Apply PRONONE with an approved granular applicator.

Residual Activity: Half-life of 2 months on a Flanagan silt loam in Illinois. Half-life of 2½ months on a silty clay in Northern Ontario.

Unique Characteristics: Rainfall is needed to activate hexazinone in the soil. Do not use on sandy, gravelly or rocky soils, or on frozen ground. Do not apply on steep slopes. Do not apply to areas where the roots of desirable trees may extend. Liquid formulation is flammable. A bioassay may be used to determine soil residue levels when sensitive crops are to be planted in soil treated with hexazinone.

IMAZAPYR

Trade Name: ARSENAL.

Chemical Family: Imidazolinone.

Crop and/or Non-Crop Registrations: Non-crop/non-graze areas such as boreal forests, industrial sites, railroad ballast, spot treatments for rail and highway rights-of-way and pipeline rights-of-way stations including well sites, battery stations and compressor or valve stations.

Sensitive Weeds: Annual and perennial grass and broadleaf weeds such as: annual - black medick, rough cinquefoil, common groundsel, hemp-nettle, kochia, lamb's-quarters, mustard spp., pigweed spp., pineappleweed, ragweed spp., Russian thistle, stinkweed, annual sow-thistle, wild buckwheat, annual bluegrass, foxtail spp., witchgrass; biennial/perennial - bladder campion, bull thistle, burdock, Canada thistle, sulfur cinquefoil, clover spp., dandelion, dog-strangling vine, field bindweed, goat's beard, goldenrod, leafy spurge, milkweed, mouse-eared chickweed, mullein spp., ox-eye daisy, plantain spp., poison-ivy, sheep sorrel, toadflax, tufted vetch, wild carrot, wild grape, wild strawberry, brome grass, Canada bluegrass, fescue spp., quackgrass, yellow nutsedge; seedling woody species - maple, poplar, raspberry and wild rose.

Uptake and Translocation: Absorbed by both roots and foliage of sensitive vegetation. Translocated in both the xylem and phloem.

Basis of Selectivity: None.

Application Methods: Postemergence on actively growing weeds. Control of non-emerged sensitive species will also be provided in the year of application. Apply in 100-550 L of water/ha with high-volume, high-pressure handguns and vehicle-mounted directed-spray equipment or conventional boom-mounted, manifold-mounted or off-centred nozzles. Low-volume, hand-held backpacks, knapsacks or other pump-up-type sprayers may also be used for direct applications to foliage. Add a non-ionic surfactant at 1 L/400 L of spray solution for spray volumes greater than 550 L/ha. A foam-reducing agent may be necessary.

Residual Activity: Season-long control of sensitive species.

Unique Characteristics: Do not contaminate ponds, lakes, streams, wetlands or sloughs and do not apply within 15 m of a wetland area or body of water. Do not mix or store in unlined steel (except stainless steel) containers or spray tanks. For ground application only. Do not use where roots from desirable vegetation may extend into the treated area (maintain a distance from desirable trees equal to at least twice the distance from the trunk to the dripline). To be used by licensed applicators only

Page 133: TABLE 9-1. Conventional Corn (Field, Seed and Sweet) Herbicide Weed Control Ratings (cont'd)

Print version reads
ULTIM + bromoxynil6
x
x
9
0
7/8
9
9R
9R
7
9
9
9
8
7
-
9
9
8
9
8
9
-
9
7
0
0
0
9
7
7
G
ULTIM + bromoxynil6
x
x
0
0
7/8
9
9R
9R
7
9
9
9
8
7
9
9
9
9
9
9
9
-
9
7
5
2
5
9
7
2
G

Correct print copy to read as shown below

ULTIM
x
x
9
0
7/8
9
9R
9R
7
9
9
9
8
7
-
9
9
8
9
8
9
-
9
7
0
0
0
9
7
7
G
ULTIM + AATREX
x
x
0
0
7/8
9
9R
9R
7
9
9
9
8
7
9
9
9
9
9
9
9
-
9
7
5
2
5
9
7
2
G

Page 222: TABLE 11-5. Soybean Herbicide Weed Control Ratings in Glyphosate Tolerant Soybeans (cont'd). Disregard this table cell inserted on this page.

Postemergence Grass and Broadleaf Herbicides for "Roundup Ready" (glyphosate tolerant) varieties only

Page 226: TABLE 11-8. Herbicide Treatment Rates for Glyphosate Tolerant ("Roundup Ready") Soybean

Correct print copy to read as shown below.

Active Ingredient
(rate)

Trade Name
(Concentrate)

Product Rate

Precautions:
For more information, see Chapter 4, Herbicides Used in Ontario, page 27 and Chapter 5, Notes on Adjuvants, page 81.

glyphosate
(0.9 kg/ha)

+ saflufenacil (25 g/ha)

 

ERAGON (70%)
+ glyphosate (360 g/L)*
+ MERGE
36 g/ha (14.4 g/acre)
+ 2.5-5 L/ha (1-2 L/acre)
+ 0.5% v/v
  • Apply PP ONLY, from 21 days prior to planting up to the day of planting.
  • Do not use rates higher than 36 g/ha (14.4 g/acre) or crop injury may result.

* Numerous products exist, refer to Table 11-7. Glyphosate Products Rates, Manufacturer, Rainfast and Salt Type Labeled for Use on Glyphosate Tolerant "Roundup Ready" Soybean, page 225 for a complete list of registered products.

ERAGON LQ (342 g/L)
+ glyphosate (360 g/L)*
+ MERGE
73 mL/ha (29.5 mL/acre)
+ 2.5-5 L/ha (1-2 L/acre)
+ 0.5% v/v

Page 353: TABLE 15-2. Herbicide Treatment Rates for Tree Fruit, Tree Nuts and Grapes (cont'd), correction

Correct print copy to read as shown below.

Active Ingredient
(rate)

Trade Name
(Concentrate)

Product Rate

Precautions:
For more information, see Chapter 4, Herbicides Used in Ontario, page 27 and Chapter 5, Notes on Adjuvants, page 81.

Soil Applied Grass and Broadleaf Herbicides (cont'd)

napropamide
(3.5 kg/ha)
+ simazine (1.0-4.5 kg/ha)
DEVRINOL DF (50 DF)
+ PRINCEP NINE-T (90 WG)
7 kg/ha (2.8 kg/acre)
+ 1.1-5.0 kg/ha (0.44-2 kg/acre)
  • Make ONLY 1 application in the planting year.
  • PRE - Apply in the fall through early spring before weeds emerge.
  • Apply the lower rate to trees established less than 1 year.
  • Do not apply to sandy soils that have organic matter less than 2%.
  • Do not apply on frozen ground or during harvest.
  • Avoid contact with trunk and leaves.
  • Incorporation by rainfall or irrigation is essential within 2 days of application.
DEVRINOL DF-XT (50 DF-XT)
+ PRINCEP NINE-T (90 WG

Page 388: TABLE 15-2. Herbicide Treatment Rates for Tree Fruit, Tree Nuts and Grapes (cont'd), correction to active ingredient indaziflam

Active Ingredient
(rate)
Trade Name
(Concentrate)
Product Rate Precautions:
For more information, see Chapter 4, Herbicides Used in Ontario, page 27 and Chapter 5, Notes on Adjuvants, page 81.
indaziflam (0.075 kg/ha) ALION 200 SC (200 g/L) 0.375 L/ha (0.152 L/acre)
  • Use on chestnut, filbert, hazelnut, heartnut and walnut ONLY.
  • Apply ONLY once per growing season.
  • Apply ONLY to crops that have been established for at least three full growing seasons.
  • Apply to soil before weeds germinate. If weeds have emerged, this product may be tank-mixed with a burn down herbicide (consult label for further instructions).
  • May be applied at any time throughout the growing season when the ground is not frozen or snow covered.
  • Excessive crop or weed debris present on the soil surface at time of application may prevent uniform product distribution in the soil and result in reduced weed control.

 

Page 406: TABLE 16-2. Herbicide Treatment Rates for Nursery and Ornamental Crops (cont'd), correction

Correct print version to read as shown below.

Active Ingredient
(rate)

Trade Name
(Concentrate)

Product Rate

Precautions:
For more information, see Chapter 4, Herbicides Used in Ontario, page 27 and Chapter 5, Notes on Adjuvants, page 81.

citric acid
(19.71 g/L)
or lactic acid
(17.69 g/L)
+ surfactant
KONA
+ surfactant
(XA oil concentrate
or KORNOIL concentrate or ASSIST oil)
Broadcast
25% KONA : 3% surfactant :
72% water
or 25 L : 3 L : 72 L
  • Do not apply to newly seeded grasses as severe injury may result.
  • Application can start in May or later. To provide consistent partial suppression of weeds repeat application every 14 days for at least 5 applications in a season.
  • Chlorosis to turf may be observed following application, but turf normally recovers in 3 weeks.
  • Do not contaminate irrigation or drinking water supplies or aquatic habitats by cleaning of equipment or disposal of wastes.
  • Do not apply by air.
  • Avoid spraying over desirable plants, fruits and vegetables.

Spot
50% Organo-sol KONA : 3% surfactant :
47% water
or 50 L : 3 L : 47 L

Page 418: TABLE 17-2. Herbicide Treatment Rates for Turfgrass (cont'd), correction

Correct print version to read as shown below.

Active Ingredient
(rate)

Trade Name
(Concentrate)

Product Rate

Precautions:
For more information, see Chapter 4, Herbicides Used in Ontario, page 27 and Chapter 5, Notes on Adjuvants, page 81.

citric acid
(19.71 g/L)
or lactic acid
(17.69 g/L)
+ surfactant
KONA
+ surfactant
(XA oil concentrate
or KORNOIL concentrate or ASSIST oil)
Broadcast
25% KONA : 3% surfactant :
72% water
or 25 L : 3 L : 72 L
  • Do not apply to newly seeded grasses as severe injury may result.
  • Application can start in May or later. To provide consistent partial suppression of weeds repeat application every 14 days for at least 5 applications in a season.
  • Chlorosis to turf may be observed following application, but turf normally recovers in 3 weeks.
  • Do not contaminate irrigation or drinking water supplies or aquatic habitats by cleaning of equipment or disposal of wastes.
  • Do not apply by air.
  • Avoid spraying over desirable plants, fruits and vegetables.

Spot
50% KONA : 3% surfactant :
47% water
or 50 L : 3 L : 47 L

 



OMAFRA Publication 75