Abstract
Abstract Integrated weed management for conservation tillage systems is needed so producers can minimize the environmental impacts of crop production while maintaining effective weed control and profitability. Reduced levels of herbicides and rotary hoeing were evaluated in combination with interrow cultivation for weed control in corn ( Zea mays L.) planted into chisel‐plowed or untilled seedbeds. Atrazine [6‐chloro‐ N ‐ethyl‐ N' ‐(1‐methylethyl)‐1,3,5‐triazine‐2,4‐diamine] at 1.1 kg a.i. ha −1 or cyanazine{2‐[[4‐chloro‐6‐(ethylamino)‐l,3,5‐triazin‐2‐yl]amino]‐2‐methylpropanenitrile} at 1.7 kg a.i. ha −1 applied within 2 d after corn planting greatly reduced weed growth compared with no herbicide use. These reduced herbicide treatments often controlled weeds as well as a standard full‐rate treatment (atrazine at 1.6 kg ha −1 plus 2.0 kg a.i. ha −1 metolachlor [2‐chloro‐ N ‐(2‐ethyl‐6‐methylphenyl)‐ N ‐(2‐methoxy‐l‐methylethyl) acetamide]) prior to cultivation in both tillage systems. In the chisel‐plow experiment, rotary hoeing was not as effective as atrazine or cyanazine in reducing early‐season weed growth. In most cases, one or two interrow cultivations following atrazine or cyanazine increased weed control and corn grain yield to levels similar to the full‐rate treatment in both the chisel‐plow and no‐tillage systems. Integrating interrow cultivation with reduced levels of herbicide maintained weed control and corn yield compared with the full‐rate treatment and is an effective weed management option for corn planted in conservation tillage systems.
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Claims 6
Claim · model-written summary
Atrazine at 1.1 kg a.i. ha −1 greatly reduced weed growth versus no herbicide.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- Atrazinee0
- Interactor
- weede0weed
- Outcome
- weed growthe0
- Direction
- reducede0
- Comparator
- no herbicide usee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Atrazine [6‐chloro‐ N ‐ethyl‐ N' ‐(1‐methylethyl)‐1,3,5‐triazine‐2,4‐diamine] at 1.1 kg a.i. ha −1 or cyanazine{2‐[[4‐chloro‐6‐(ethylamino)‐l,3,5‐triazin‐2‐yl]amino]‐2‐methylpropanenitrile} at 1.7 kg a.i. ha −1 applied within 2 d after corn planting greatly reduced weed growth compared with no herbicide use”
Claim · model-written summary
Cyanazine at 1.7 kg a.i. ha −1 greatly reduced weed growth versus no herbicide.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- cyanazinee0
- Interactor
- weede0weed
- Outcome
- weed growthe0
- Direction
- reducede0
- Comparator
- no herbicide usee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cyanazine{2‐[[4‐chloro‐6‐(ethylamino)‐l,3,5‐triazin‐2‐yl]amino]‐2‐methylpropanenitrile} at 1.7 kg a.i. ha −1 applied within 2 d after corn planting greatly reduced weed growth compared with no herbicide use”
Claim · model-written summary
Reduced herbicide treatments often controlled weeds as well as the standard full-rate treatment before cultivation.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- reduced herbicide treatmentse0
- Interactor
- weedse0weed
- Outcome
- controlled weedse0
- Direction
- as well ase0
- Comparator
- standard full‐rate treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These reduced herbicide treatments often controlled weeds as well as a standard full‐rate treatment (atrazine at 1.6 kg ha −1 plus 2.0 kg a.i. ha −1 metolachlor”
t0“Corn”
Claim · model-written summary
Rotary hoeing was less effective than atrazine or cyanazine at reducing early-season weed growth in the chisel-plow experiment.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- rotary hoeinge0
- Interactor
- weede0weed
- Outcome
- early‐season weed growthe0
- Direction
- not as effectivee0
- Comparator
- atrazine or cyanazinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the chisel‐plow experiment, rotary hoeing was not as effective as atrazine or cyanazine in reducing early‐season weed growth”
t0“Corn”
Claim · model-written summary
One or two interrow cultivations after atrazine or cyanazine increased weed control to a level similar to the full-rate treatment.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- one or two interrow cultivations following atrazine or cyanazinee0
- Interactor
- weede0weed
- Outcome
- weed controle0
- Direction
- increasede0
- Comparator
- full‐rate treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In most cases, one or two interrow cultivations following atrazine or cyanazine increased weed control and corn grain yield to levels similar to the full‐rate treatment in both the chisel‐plow and no‐tillage systems”
Claim · model-written summary
One or two interrow cultivations after atrazine or cyanazine increased corn grain yield to a level similar to the full-rate treatment.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- one or two interrow cultivations following atrazine or cyanazinee0
- Outcome
- corn grain yielde0
- Direction
- increasede0
- Comparator
- full‐rate treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In most cases, one or two interrow cultivations following atrazine or cyanazine increased weed control and corn grain yield to levels similar to the full‐rate treatment in both the chisel‐plow and no‐tillage systems”
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