Chickpeas Dry Beans Faba Beans Lentils Peas Field Management Harvest & Storage
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Harvest Aid Options For Pulses

Herbicide* Herbicide Group Pre-Harvest Interval* Pulse Crops Registered
Aim® EC/Foremost™/ Revenge™ (carfentrazone) 14 3 days Field Peas, Chickpeas, Dry Beans, Faba Beans, Soybeans
CleanStart® (carfentrazone + glyphosate) 9 + 14 3 days Field Peas, Chickpeas, Dry Beans, Faba Beans, Soybeans
diquat (many brands) 22 4-7 days (chickpeas & lentils); 4-10 days (faba beans); When sample tests dry (peas) or when crop is considered ready (dry beans, soybeans) Lentils, Field Peas, Chickpeas, Dry Beans, Faba Beans, Soybeans
glyphosate (many brands) 9 7-14 days Lentils, Field Peas, Chickpeas, Dry Beans, Faba Beans, Soybeans (not for crops grown for seed)
Heat® Brands (saflufenacil) 14 2-3 days* Red Lentils*, Field Peas, Chickpeas, Dry Beans, Faba Beans, Soybeans (*Must be tank mixed with glyphosate when applied to red lentils)
Valtera™ (flumioxazin) 14 5-8 days* Lentils, Field Peas, Chickpeas, Dry Beans, Faba Beans

*This chart is intended as a guide only. Consult product label prior to use for final detailed instructions. Some product and crops may have market access concerns. See prior to use.

Version June 2023

Staging Pre-Harvest Applications of Herbicides

Pesticide products can lead to higher residues in the seed and reduced yields when applied too early. Appropriate application stage is when the crop is at physiological maturity (30% seed moisture or less). Know the proper staging for harvest aid products and ensure the entire area being sprayed is at the recommended stage:

Choosing the Right Product

Select your pre-harvest product based on your intentions for the field. Glyphosate is not a desiccant and is intended for weed control prior to harvest only. Products such as Aim®, diquat, Heat®, and Valtera™ can act as harvest aids or desiccants to dry down the crop to facilitate harvest. If you are intending to use the crop for seed, glyphosate (including CleanStart®) should not be applied pre-harvest.

Additionally, buyers will not accept lentils treated with glufosinate this year. If using a pre-harvest herbicide for weed control, ensure that the weeds are at the correct stage and are actively growing for best product performance. Products that are used pre-harvest may have market access concerns. Ensure that the product you choose is approved for your intended market, and that labelled rates and pre-harvest intervals are followed to protect access to important pulse export markets (see

Pre-Harvest Intervals

The pre-harvest interval is the time that must be left between application of a herbicide and the cutting of the crop (either swathed or straight-cut). The purpose of the pre-harvest interval is to ensure that no more than the allowable residue of the herbicide is present in the harvested material.

Maximum Residue Limits (MRLs) are determined for each product and crop it is applied to based on registered rates and registered staging of the crop. If applied too early to the crop, extra product may be taken up by the crop, leading to higher than allowable residues present in the seed.

Disregarding these pre-harvest intervals and applying to parts of the field that are too green or not yet at the right stage, can result in residues over the MRLs, which can lead to market disruptions.

Tips for Using Glyphosate For Pre-Harvest Weed Control in Pulses

Figure 1. Proper pea staging for pre-harvest herbicide applications.
Source: Bayer
Figure 2. Proper lentil staging for pre-harvest herbicide applications. Note: the green weeds in bottom of the photo.
Figure 3. Proper lentil stage for pre-harvest herbicide applications at 30% moisture or less.
Note: the lower pods should appear brown and seed rattle with 80% of the plant yellow to brown in colour. No immature soft seeds.
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