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  6. Controlling Herbicide Resistant Waterhemp in Soybeans: 2020 Trials

Controlling Herbicide Resistant Waterhemp in Soybeans: 2020 Trials

File(s)
2020brown-NYSIPM.pdf (575.64 KB)
Permanent Link(s)
https://hdl.handle.net/1813/103513
Collections
NYS IPM Project Reports
Author
Brown, Bryan
Abstract

Herbicide resistant tall waterhemp (Amaranthus tuberculatus) continues to be one of the most problematic weeds in US field crops. Thus far, it has primarily established in western and central New York. Our second year of trial results generally followed our first-year results. Herbicides in WSSA groups 2, 5, and 9 should not be relied on for waterhemp control. However, programs that included at least two non-chemical tactics or herbicides from groups 4, 14, or 15 were very effective. Seedbank modelling showed that control at 95%, 98%, or 100% would cause waterhemp emergence to increase, maintain, or decrease over time, respectively. Our partial budget analysis showed that profitability generally reflected yields. We also found that cereal rye (Secale cereale) residue can provide up to 87% control of waterhemp, which, if used in conjunction with a moderately effective herbicide program, could provide excellent control.

Sponsorship
New York Farm Viability Institute
Date Issued
2020
Publisher
New York State Integrated Pest Management Program
Keywords
Agricultural IPM
•
Field Crops
•
Soybeans
•
Weeds
•
Waterhemp
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International
Rights URI
http://creativecommons.org/licenses/by-nc-nd/4.0/
Type
report
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