Introduction

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Crop Pre-Harvest Interval Application Stage
Canola 3 Apply when 60 – 75% of seeds have changed colour.
Chickpea †† 2 Desi – Apply when most seeds turned yellow/brown
Kabuli – Apply when most seeds turned white/tan
Field Pea 3 A majority of the pods are brown (70 – 80%)
Red lentil varieties only 3 Lower most pods (15%) are brown and rattle when shaken
Dry bean 2 Stems are green to brown, pods are mature (yellow to brown),
Soybean 3
and 80 – 90% of leaves have dropped
Sunflower 7 The backs of flower heads and bracts are turning yellow, and
seed moisture is 20 – 30%.
††
Heat LQ only
Apply Heat WG at 28.4 g per acre or Heat LQ at 59 mL per acre with 0.4 L per acre Merge Adjuvant when the product is not
used as part of a tank mix.
Heat (WG or LQ) may be tank mixed with glyphosate on field pea, lentil, dry beans and soybeans for additional pre-harvest
weed control. When tank mixing with glyphosate, it is recommended to apply Heat WG at 20.4 g per acre or Heat LQ at
42.8 mL per acre. DO NOT tank mix with glyphosate when the harvested grain is to be used for seed.
Weed Control
Weeds, Rates and Staging:
Apply up to the 8 leaf stage unless otherwise indicated to control the weeds controlled by glyphosate plus rapid
burndown of:
º Canada fleabane
º Cleavers
(4 whorl-stage)**
º Dandelion***
º Kochia (up to 15 cm)
º Lamb’s-quarters
º Flixweed
º Narrow-leaved hawk’sbeard
(up to 8 cm)
º Pigweed (redroot)**
º Ragweed (common)
º Round-leaved mallow
º Stinkweed**
º Volunteer canola**
º Wild buckwheat **
º Wild mustard**
* All varieties
** Applications at the 28.4 g per acre rate of Heat WG or 59 mL per acre rate of Heat LQ will also provide suppression
of the emergence of these weeds following application.
*** Top growth burndown of perennial plants, control of spring germinating plants
Application Information:
• Water volume:
º Preseed, pre-emergent, fallow or post-harvest by ground only: 20 to 40 L per acre.
º Harvest aid/Desiccation:
º Ground: 81 L per acre stand alone or 40 L per acre when tank mixed with glyphosate
º Aerial: 20 L per acre.
• Higher volumes are required for dense weed stands. Weed control improves with the amount of coverage.
• Nozzles and Pressure: Use a combination of nozzles and pressure designed to deliver thorough, even coverage with
ASABE medium classification droplets. Low drift nozzles may require higher pressures for proper performance. Higher
pressures may be required to penetrate dense plant stands.
How it Works:
Refer to Table 9 on page 48.
Effects of Growing Conditions:
Rainfall shortly after application can result in slight injury to the crop. See the ‘Restrictions’ section below for more details.
Warm, moist growing conditions promote active weed growth. Weeds hardened off by environmental stress such as cold
weather, drought or excessive heat may not be adequately controlled.