scholarly journals Evaluation of weed control efficacy of narrow-row spacing, wheat mulch and herbicides in no-till soybean

2003 ◽  
Vol 48 (Supplement) ◽  
pp. 236-237
Author(s):  
S. Nakayama ◽  
H. Hamaguchi
Keyword(s):  
Weed Control ◽  
Row Spacing ◽  
Control Efficacy ◽  
No Till ◽  
Narrow Row

scholarly journals Weed control efficacy of narrow-row sowing and some herbicides in no-till soybean

2001 ◽  
Vol 46 (Supplement) ◽  
pp. 72-73 ◽  
Author(s):  
S. NAKAYAMA ◽  
H. HAMAGUCHI ◽  
Y. SHIBUYA ◽  
S. ONO
Keyword(s):  
Weed Control ◽  
Control Efficacy ◽  
No Till ◽  
Narrow Row

Weed Control with Reduced Rates of Chlorimuron Plus Metribuzin and Imazethapyr in No-Till Narrow-Row Soybean (Glycine max)

1998 ◽  
Vol 12 (1) ◽  
pp. 32-36 ◽  
Author(s):  
William G. Johnson ◽  
Jeffrey S. Dilbeck ◽  
Michael S. Defelice ◽  
J. Andrew Kendig
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Field Studies ◽  
Weed Suppression ◽  
Crop Response ◽  
Soybean Production ◽  
No Till ◽  
Giant Foxtail ◽  
The Difference ◽  
Narrow Row

Field studies were conducted at three locations in 1993 and 1994 to evaluate weed control and crop response to combinations of glyphosate, metolachlor, 0.5 X and 1 X label rates of chlorimuron plus metribuzin applied prior to planting (PP), and 0.5 X and 1 X label rates of imazethapyr applied early postemergence (EPOST) or postemergence (POST) in no-till narrow-row soybean production. Giant foxtail densities were reduced with sequential PP followed by (fb) EPOST or POST treatments. Large crabgrass was reduced equivalently with all herbicide combinations involving chlorimuron plus metribuzin PP fb imazethapyr. Common cocklebur control was variable but was usually greater with treatments that included imazethapyr. Ivyleaf morningglory densities were not reduced with any herbicide combinations. Sequential PP fb EPOST or POST treatments tended to provide slightly better weed suppression than PP-only treatments, but the difference was rarely significant. Soybean yields with treatments utilizing 0.5 X rates were usually equal to 1 X rates.

Weed control with reduced rates of imazaquin and imazethapyr in no-till narrow-row soybean (Glycine max)

Weed Science ◽  
1998 ◽  
Vol 46 (1) ◽  
pp. 105-110 ◽  
Author(s):  
William G. Johnson ◽  
Jeffrey S. Dilbeck ◽  
Michael S. DeFelice ◽  
J. Andrew Kendig
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Field Studies ◽  
Net Income ◽  
Crop Response ◽  
Soybean Production ◽  
No Till ◽  
Giant Foxtail ◽  
Herbicide Treatments ◽  
Narrow Row

Field studies were conducted at three locations in 1993 and 1994 to evaluate weed control and crop response to metolachlor plus combinations of 0.5 × and 1 × label rates of imazaquin applied preplant and imazethapyr applied early postemergence or postemergence in no-till narrow-row soybean production. Giant foxtail, common ragweed, common cocklebur, and large crabgrass population reductions were greater with sequential preplant metolachlor plus imazaquin followed by early postemergence or postemergence imazethapyr than with preplant metolachlor plus imazaquin or early postemergence/postemergence imazethapyr alone. Ivyleaf morningglory was not effectively controlled by any herbicide program. Pennsylvania smartweed populations were reduced with all herbicide treatments. Soybean yields with treatments utilizing 0.5 × rates were usually equal to 1 × rates if imazethapyr was applied early postemergence or postemergence. Net income with reduced herbicide rates was equal to full-label rates and provided no greater risk to net income.

scholarly journals A Low-cost Robot with Autonomous Recharge and Navigation for Weed Control in Fields with Narrow Row Spacing

2021 ◽  
Author(s):  
Yayun Du ◽  
Bhrugu Mallajosyula ◽  
Deming Sun ◽  
Jingyi Chen ◽  
Zihang Zhao ◽  
...  
Keyword(s):  
Weed Control ◽  
Low Cost ◽  
Row Spacing ◽  
Narrow Row

Weed Management Strategies for No-Till Soybean (Glycine max) Grown on Clay Soils

1998 ◽  
Vol 12 (4) ◽  
pp. 660-669 ◽  
Author(s):  
Clarence J. Swanton ◽  
Tony J. Vyn ◽  
Kevin Chandler ◽  
Anil Shrestha
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Cover Crop ◽  
Management Strategies ◽  
The Other ◽  
Clay Soils ◽  
No Till ◽  
Herbicide Treatments ◽  
Pre Treatment ◽  
Narrow Row

Weed management strategies are needed for no-till soybean grown on clay soils. The effect of several weed management strategies on weed biomass, soybean yield, and gross return were evaluated in 1993, 1994, and 1995 on clay soils at two locations in southern Ontario. Soybean seeds were planted in narrow (19 cm) and wide (76 cm) rows with or without a rye cover crop. Herbicide treatments included glyphosate alone, glyphosate followed by imazethapyr + metribuzin applied PRE, and glyphosate followed by acifluorfen + bentazon applied POST. Two additional treatments with interrow cultivation were included in the wide-row soybean plots with glyphosate and glyphosate + PRE treatments. A nontreated check plot without rye was also included. Presence of a cover crop did not affect weed biomass or soybean yield. The glyphosate + broadcast PRE treatment provided the most consistent weed control both in narrow- and wide-row soybean. The weed control in this treatment ranged from 92 to 100%. The other treatments provided variable weed control across years and locations. The narrow- row plots with glyphosate + broadcast PRE treatment provided the most consistent soybean yields that were generally higher than the other treatments and ranged from 2,560 to 3,420 kg/ha. Soybean yields varied across locations and years in other treatments. Similar weed control and soybean yields were obtained with banded PRE herbicide + interrow cultivation and PRE treatments; however, herbicide use was 60% lower in banded PRE herbicide + interrow cultivation treatment. Narrow-row soybean averaged 27% higher gross returns than wide-row soybean for all broadcast herbicide treatments. Narrow-row soybean with PRE herbicide provided the highest gross returns. No-till soybean in narrow rows with preplant glyphosate and broadcast PRE treatment was the most risk-efficient weed management system on clay soils.

Mechanical and cultural weed control in corn and soybeans

1990 ◽  
Vol 5 (3) ◽  
pp. 114-119 ◽  
Author(s):  
Jeffrey L. Gunsolus
Keyword(s):  
Weed Control ◽  
Maximum Yield ◽  
Farm Size ◽  
Yield Potential ◽  
Row Spacing ◽  
Corn Yield ◽  
Management Skills ◽  
Narrow Row ◽  
Nonchemical Weed Control ◽  
Mechanical Weed Control

AbstractMany farmers and consumers are reevaluating chemical weed control because of the environmental risks of herbicides and their influence on farm size and diversity. This paper reviews research of the last 35 years on mechanical and cultural weed control in corn(Zea maysL.)and soybeans(Glycine maxL.).Soybeans can better use the weed control advantages of late planting and narrow row spacing and are less affected by early stand losses from mechanical weed control. In Minnesota, delaying planting to early June allows early germinating weeds to be controlled by preplant tillage but reduces the maximum yield potential of corn by approximately 25 percent and soybeans by approximately 10 percent. Narrow rows allow the crop canopy to close earlier, preventing emerging weeds from developing. However, in a nonchemical weed control system, the row spacing should allow for inter-row cultivation to control weeds that emerge with the crop. Up to a 10 percent reduction in crop stand may be expected in fields that have been rotary hoed. In Minnesota, a 10 percent stand loss results in a 2 percent loss of corn yield potential and no loss of soybean yield potential. Successful mechanical weed control is directly related to the timeliness of the operation. Rotary hoeing is effective on weeds that have germinated but not yet emerged but not on weeds that germinate from deeper than 5 cm, on no-till fields, or on fields with more than 20 to 30 percent crop residue. Inter-row cultivation is most effective on weeds up to 10 to 15 cm tall. Successful nonchemical weed control requires highly refined management skills and is as much an art as a science.

Decreasing Rates of Nonselective Herbicides in Double-Crop No-Till Soybeans (Glycine max)

1991 ◽  
Vol 5 (1) ◽  
pp. 198-201 ◽  
Author(s):  
Carroll M. Moseley ◽  
Edward S. Hagood
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Production Systems ◽  
Weed Species ◽  
Control Efficacy ◽  
Common Ragweed ◽  
Soybean Production ◽  
No Till ◽  
Large Crabgrass

Experiments were conducted in 1988 and 1989 at four sites in Virginia to test weed control efficacy in double-crop, no-till soybean production systems with reduced rates of nonselective herbicides. Chlorimuron plus linuron at 0.04 plus 0.46 kg ha-1gave more than 94% control of five weed species, but only 81 to 86% control of three weed species. Tank mix additions of reduced rates of either glyphosate, HOE-0661 or paraquat to the chlorimuron plus linuron treatment increased large crabgrass and common ragweed control.

Timing of Chlorimuron and Imazaquin Application for Weed Control in No-Till Soybeans (Glycine max)

Weed Science ◽  
1991 ◽  
Vol 39 (2) ◽  
pp. 232-237 ◽  
Author(s):  
J. Boyd Carey ◽  
Michael S. Defelice
Keyword(s):  
Weed Control ◽  
Field Studies ◽  
Row Spacing ◽  
Herbicide Application ◽  
Poor Control ◽  
Application Timing ◽  
Common Lambsquarters ◽  
No Till ◽  
Giant Foxtail ◽  
Herbicide Treatments

Field studies were conducted to evaluate the influence of herbicide application timing on weed control in no-till soybean production. Row spacing generally had no effect on weed control. Herbicide treatments containing chlorimuron plus metribuzin applied as many as 45 days prior to planting in 1988 and 1989 controlled broadleaf weeds throughout the growing season. Imazaquin applied 45 and 30 days prior to planting provided poor control of common cocklebur in 1989. Giant foxtail control was inconsistent with all herbicide treatments. Soybean yields subsequent to early preplant herbicide applications were greater than or equal to those in which applications were made at planting when late-season weed control was adequate. Herbicides applied preemergence did not control high densities of common lambsquarters in 1989.

Weed Control and Economic Returns with Postemergence Herbicides in Narrow-Row Soybeans (Glycine max)

1997 ◽  
Vol 11 (3) ◽  
pp. 453-459 ◽  
Author(s):  
William G. Johnson ◽  
J. Andrew Kendig ◽  
Raymond E. Massey ◽  
Michael S. Defelice ◽  
Chad D. Becker
Keyword(s):  
Weed Control ◽  
Field Studies ◽  
Net Income ◽  
Economic Returns ◽  
Crop Response ◽  
Common Lambsquarters ◽  
No Till ◽  
Giant Foxtail ◽  
Narrow Row ◽  
Postemergence Herbicides

Field studies were conducted at three sites in 1993 and 1994 to evaluate weed control, crop response, and economic returns to 0.5× and 1× postemergence rates of chlorimuron, chlorimuron plus quizalofop, bentazon plus acifluorfen, fluazifop plus fenoxaprop, imazethapyr, and imazethapyr plus clethodim in no-till narrow-row soybean production. Common lambsquarters, ivyleaf morningglory, and common ragweed were controlled equally with 0.5× rates applied early postemergence and 1× rates applied mid-postemergence. Control of giant foxtail, large crabgrass, and common cocklebur was generally greater with 1× rates mid-postemergence than with 0.5× rates early postemergence. Soybean yields were equivalent with 0.5× and 1× rates. Soybean yields and net income were highest with 1× and 0.5× rates of chlorimuron plus quizalofop and imazethapyr plus clethodim, and metolachlor preemergence (PRE) followed by 0.5× bentazon plus acifluorfen.

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