Evaluation of Imazaquin for Weed Control in Flue-Cured Tobacco (Nicotiana tabacum)

Weed Science ◽  
1987 ◽  
Vol 35 (6) ◽  
pp. 824-829 ◽  
Author(s):  
Frank R. Walls ◽  
A. Douglas Worsham ◽  
William K. Collins ◽  
Frederick T. Corbin ◽  
J. R. Bradley
Keyword(s):  
Nicotiana Tabacum ◽  
Weed Control ◽  
Chenopodium Album ◽  
Amaranthus Retroflexus ◽  
Ambrosia Artemisiifolia ◽  
Common Ragweed ◽  
Prickly Sida ◽  
Over The Top ◽  
Methods Of Application ◽  
Large Crabgrass

Imazaquin {2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-quinolinecarboxylic acid} was evaluated in the field for weed control in flue-cured tobacco (Nicotiana tabacumL.) during 1983 and 1984. The 75 DG formulation of imazaquin was used at 0.28 and 0.42 kg ai/ha. Methods of application were: preplant incorporated, over the top immediately after transplanting, postbed incorporated, and early postemergence. Imazaquin controlled 90%, or better, of common lambsquarters (Chenopodium albumL. # CHEAL), common ragweed (Ambrosia artemisiifoliaL. # AMBEL), redroot pigweed (Amaranthus retroflexusL. # AMARE), spiny amaranth (Amaranthus spinosusL. # AMASP), ivyleaf morningglory [Ipomoea hederacea(L.) Jacq. # IPOHE], sicklepod (Cassia obtusifoliaL. # CASOB), and prickly sida (Sida spinosaL. # SIDSP) with all application methods except early postemergence. It controlled 80 to 89% of large crabgrass (Digitaria sanguinalisL. # DIGSA) by the soil-applied methods. Postemergence applications of imazaquin controlled common ragweed, pigweed spp., ivyleaf morningglory, prickly sida, and sicklepod. Imazaquin was less effective postemergence on lambsquarters and large crabgrass. Tobacco tolerated use of imazaquin by all methods of application except preplant incorporation.

Controlling Broadleaf Weeds in Soybeans by Bentazon in Minnesota

Weed Science ◽  
1974 ◽  
Vol 22 (2) ◽  
pp. 136-142 ◽  
Author(s):  
Robert N. Andersen ◽  
William E. Lueschen ◽  
Dennis D. Warnes ◽  
Wallace W. Nelson
Keyword(s):  
Weed Control ◽  
Chenopodium Album ◽  
Field Studies ◽  
Ambrosia Artemisiifolia ◽  
Common Lambsquarters ◽  
Low Area ◽  
Wild Mustard ◽  
Polygonum Pensylvanicum ◽  
Brassica Kaber ◽  
Over The Top

In field studies, bentazon [3-isopropyl-1H-2,1,3-benzothiadiazin-(4)3H-one 2,2-dioxide] was applied as postemergence sprays over the top of weeds and soybeans[Glycine max(L.) Merr.]. Bentazon at 0.84 to 1.68 kg/ha applied as an early postemergence treatment controlled wild mustard[Brassica kaber(DC.) L.C. Wheeler var.pinnatifida(Stokes) L.C. Wheeler], common ragweed (Ambrosia artemisiifoliaL.), velvetleaf (Abutilon theophrastiMedic.), Pennsylvania smartweed, (Polygonum pensylvanicumL.), common cocklebur (Xanthium pensylvanicumWallr.), and wild common sunflower (Helianthus annuusL.). Pigweeds (Amaranthussp.) were controlled by applications in the three true-leaf stage but became more resistant at later stages. Control of common lambsquarters (Chenopodium albumL.) was erratic. The optimum time for controlling weeds with bentazon was around the first trifoliolate stage of soybeans. Rainfall within several hours after treatment reduced weed control. Eight yield studies, two of which included eight cultivars, were conducted on weed-free soybeans. In none were yields reduced significantly by bentazon at 3.36 kg/ha (the highest rate studied). Eight yield studies were conducted on soybeans infested with common cocklebur or velvetleaf. Weed control was generally excellent with 0.84 kg/ha of bentazon. Where infestations were sufficient to reduce yields, bentazon treatments increased the yields to levels generally comparable with those of the handweeded checks. One exception was an application of bentazon to soybeans growing in a low area that was periodically flooded by heavy rains. In that experiment the benefit of controlling common cocklebur was offset by bentazon injury to the soybeans, and yields from the treated plots were about the same as those of the weedy check.

Utility of Clomazone for Annual Grass and Broadleaf Weed Control in Peanut (Arachis hypogaea)

1994 ◽  
Vol 8 (1) ◽  
pp. 23-27 ◽  
Author(s):  
David L. Jordan ◽  
John W. Wilcut ◽  
Leslie D. Fortner
Keyword(s):  
Weed Control ◽  
Arachis Hypogaea ◽  
Field Experiments ◽  
Systems Approach ◽  
Annual Grass ◽  
Weed Species ◽  
Common Ragweed ◽  
Prickly Sida ◽  
Better Than ◽  
Large Crabgrass

Field experiments conducted in 1988 and 1989 evaluated clomazone alone and in a systems approach for weed control in peanut. Clomazone PPI at 0.8 kg ai/ha controlled common ragweed, prickly sida, spurred anoda, and tropic croton better than ethalfluralin and/or metolachlor applied PPI. POST application of acifluorfen plus bentazon was not needed to control these weeds when clomazone was used. Acifluorfen plus bentazon improved control of these weeds when clomazone was not used and generally were necessary to obtain peanut yields regardless of the soil-applied herbicides. Alachlor PRE did not improve clomazone control of any weed species evaluated. Fall panicum and large crabgrass control was similar with clomazone or clomazone plus ethalfluralin.

Utility of Maintained Weed Infestations Under Field Conditions

Weed Science ◽  
1970 ◽  
Vol 18 (2) ◽  
pp. 206-214 ◽  
Author(s):  
R. P. Upchurch ◽  
F. L. Selman ◽  
H. L. Webster
Keyword(s):  
Chenopodium Album ◽  
Amaranthus Retroflexus ◽  
Ambrosia Artemisiifolia ◽  
Field Conditions ◽  
Moderate Degree ◽  
Weed Species ◽  
Common Ragweed ◽  
Common Lambsquarters ◽  
Dimethyl Urea ◽  
Polygonum Pensylvanicum

Relatively pure stands of eight weed species were maintained under field conditions on a Goldsboro loamy sand at Lewiston, North Carolina, for all or part of a 6-year period. Herbicides evaluated as preemergence surface treatments for these species were 2-sec-butyl-4,6-dinitrophenol (dinoseb), isopropyl m-chlorocarbanilate (chloropropham), 3-(3,4-dichlorophenyl)-1,1-dimethyl-urea (diuron), 2-chloro-4,6-bis(ethylamino)-s-triazine (simazine), and 3-amino-2,5-dichlorobenzoic acid (amiben). S-ethyl dipropylthiocarbamate (EPTC) and a,a,a-trifluro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin) were evaluated as preemergence incorporated treatments. The first four herbicides were evaluated in 1961, 1964, and 1966 while the last three were evaluated in 1962, 1963, and 1965. A series of rates was used for each chemical with three replications. With the exception of diuron which failed to control goosegrass (Eleusine indica (L.) Gaertn.), all of the herbicides provided at least a moderate degree of control of goosegrass, smooth crabgrass (Digitaria ischaemum (Schreb.) Muhl.), and redroot pigweed (Amaranthus retroflexus L.) at the respective typical field use rates. In general, trifluralin and amiben gave the best grass control and dinoseb the poorest. None of the herbicides effectively controlled common cocklebur (Xanthium pensylvanicum Wallr.) or ivyleaf morningglory (Ipomoea hederacea (L.) Jacq.). Trifluralin and EPTC did not control Pennsylvania smartweed (Polygonum pensylvanicum L.), common ragweed (Ambrosia artemisiifolia L.), and common lambsquarters (Chenopodium album L.). Chloropropham was ineffective on common ragweed. Simazine, chloropropham, and amiben controlled Pennsylvania smartweed while diuron, simazine, dinoseb, and amiben were especially effective on common lambsquarters. Distinctive patterns of nematode infestations were observed as a function of weed species.

Response of Annual Weed Species to Glufosinate and Glyphosate

1999 ◽  
Vol 13 (3) ◽  
pp. 542-547 ◽  
Author(s):  
Brent E. Tharp ◽  
Oliver Schabenberger ◽  
James J. Kells
Keyword(s):  
Weed Management ◽  
Chenopodium Album ◽  
Ambrosia Artemisiifolia ◽  
Weed Species ◽  
Common Ragweed ◽  
Common Lambsquarters ◽  
Setaria Faberi ◽  
Giant Foxtail ◽  
Annual Weeds ◽  
Large Crabgrass

The recent introduction of glufosinate-resistant and glyphosate-resistant crops provides growers with new options for weed management. Information is needed to compare the effectiveness of glufosinate and glyphosate on annual weeds. Greenhouse trials were conducted to determine the response of barnyardgrass (Echinochloa crus-galli), common lambsquarters (Chenopodium album), common ragweed (Ambrosia artemisiifolia), fall panicum (Panicum dichotomiflorum), giant foxtail (Setaria faberi), large crabgrass (Digitaria sanguinalis), and velvetleaf (Abutilon theophrasti) to glufosinate and glyphosate. The response of velvetleaf and common lambsquarters was investigated at multiple stages of growth. Glufosinate and glyphosate were applied to each weed species at logarithmically incremented rates. The glufosinate and glyphosate rates that provided a 50% reduction in aboveground weed biomass, commonly referred to as GR50values, were compared using nonlinear regression techniques. Barnyardgrass, common ragweed, fall panicum, giant foxtail, and large crabgrass responded similarly to glufosinate and glyphosate. Common lambsquarters 4 to 8 cm in height was more sensitive to glufosinate than glyphosate. In contrast, 15- to 20-cm tall-velvetleaf was more sensitive to glyphosate than glufosinate.

scholarly journals Weed control in bean and green bean crops

Biljni lekar ◽  
2021 ◽  
Vol 49 (6) ◽  
pp. 804-814
Author(s):  
Aleksandra Savić ◽  
Sanja Đurović ◽  
Srđan Stevanović ◽  
Milan Ugrinović
Keyword(s):  
Weed Control ◽  
Chenopodium Album ◽  
Datura Stramonium ◽  
Amaranthus Retroflexus ◽  
Ambrosia Artemisiifolia ◽  
Xanthium Strumarium ◽  
Green Beans ◽  
Important Place ◽  
Growing Conditions ◽  
High Yields

Phaseolus vulgaris (beans; green beans) as a food of high nutritional value occupies an important place in the human diet. In addition to all the basic growing conditions, one of the key requirements for achieving high yields is successful weed control. Weeds such as Amaranthus retroflexus, Chenopodium album, Datura stramonium, Abutilon theophrasti, Xanthium strumarium, Cirsium arvense, Ambrosia artemisiifolia, Sorghum halepense and others appear as the most dominant species in our agroecological conditions. The application of the concept of integrated weed control implies the application of all available measures (crop rotation, proper and timely tillage, application of herbicides, etc.). Although there is a wider range of registered herbicides for weed control in beans and green beans in the world, preparations based on active substances: clethodim, quizalofop-P-tefuril, imazamox and bentazone have been registered in Serbia.

Biologically Effective Dose and Selectivity of SAN 1269H (BAS 662H) for Weed Control in Corn (Zea mays)

1999 ◽  
Vol 13 (2) ◽  
pp. 283-289 ◽  
Author(s):  
Peter H. Sikkema ◽  
Stevan Z. Knezevic ◽  
Allan S. Hamill ◽  
François J. Tardif ◽  
Kevin Chandler ◽  
...  
Keyword(s):  
Effective Dose ◽  
Weed Control ◽  
Field Experiments ◽  
Leaf Growth ◽  
Amaranthus Retroflexus ◽  
Ambrosia Artemisiifolia ◽  
Biologically Effective Dose ◽  
Common Ragweed ◽  
Common Lambsquarters ◽  
Wild Buckwheat

Field experiments were conducted in 1996 and 1997 at five locations in southwestern Ontario to develop dose-response curves for SAN 1269H (SAN 835H plus dicamba) for weed control and crop tolerance in corn. SAN 1269H controlled wild buckwheat (Polygonum convolvulusL.), common ragweed (Ambrosia artemisiifoliaL.), common lambsquarters (Chenopodium albumL.), pigweeds (Amaranthus retroflexusL. andA. powelliiS. Wats.), barnyardgrass [Echinochloa crus-galli(L.) Beauv.], and yellow foxtail [Setaria glauca(L.) Beauv.]. Biologically effective doses of SAN 1269H (BAS 662H) were 440, 430, 180, and 40 g/ha for yellow foxtail, barnyard grass, wild buckwheat, and common ragweed, respectively. The biologically effective dose (that which provides 90% reduction in weed dry matter) for common lambsquarters was 560 g/ha when SAN 1269H was applied preemergence (PRE) and 110 g/ha when applied postemergence (POST). When applied PRE at a rate of 420 g/ha, pigweed was controlled, whereas only 85 g/ha was required when applied POST. Grain yield increased with dose of SAN 1269H and did not differ with time of application. Temporary crop injury was observed when SAN 1269H was applied at the four- to six-leaf growth stage. Optimum corn yields were achieved with doses of 100 to 250 g/ha.

scholarly journals Grain sorghum productivity depending on herbicide application

2020 ◽  
Vol 202 (11) ◽  
pp. 14-20
Author(s):  
Ol'ga Kurdyukova ◽  
A. Baranovskiy
Keyword(s):  
Weed Control ◽  
Chenopodium Album ◽  
Dry Weight ◽  
Steppe Zone ◽  
Grain Sorghum ◽  
Amaranthus Retroflexus ◽  
Ambrosia Artemisiifolia ◽  
Control Measures ◽  
Growing Period ◽  
Weed Infestation

Abstract. The purpose of the work is to establish the effectiveness of weed in control in crops of grain sorghum with herbicides of soil and leaf action. Scientific novelty. For the first time in sorghum crops for weed control, effective combinations of soil and leaf herbicides have been identified. Methods. Experiments were carried out on the black soils of steppe zone Ukraine. Research methods are generally accepted. The control options were herbicide-free and weed-free. Results. At tillering stage the number of weeds in sorghum crops reached 141 pieces/m2 and their air-dry weight was 218 g/m2. Green amaranth (Amaranthus retroflexus), fat hen (Chenopodium album), field mustard (Sinapis arvensis), ragweed ragweed (Ambrosia artemisiifolia), barnyard grass (Echinochloa crus-galli), bristlegrass (Setaria viridis) were dominant in the crops. The use of foliar-applied herbicides such as Agritox (1 l/ha), Ballerina (0.4 l/ha), Dialen Super (0.7 l/ha) in the stage of three-five leaves and a pre sowing soil-applied herbicide Primextra Gold (3 l/ha) ensured the maximum reduction of weed infestation of grain sorghum crops. The number of weeds with the use of these herbicides decreased by 10.4–19.7 times, and their weight decreased by 4.1–4.8 times in comparison with the options without the use of weed control measures. The conditions for plant growth and development were improved due to the reduction of weed infestation of grain sorghum crops. The growing period of the crop reduced from 125 to 114 days, the height of plants increased by 19–21 cm and their weight increased by 2.7–2.8 times. The sorghum grain yield reached 6.32–6.34 t/ha, which was higher than with the options without the use of weed control measures by 4.01–4.30 t/ha or 3.0–3.1 times. The same results were obtained in production conditions.

Clomazone for Weed Control in Sweet Potatoes (Ipomoea batatas)

1990 ◽  
Vol 4 (3) ◽  
pp. 648-651 ◽  
Author(s):  
Wayne C. Porter
Keyword(s):  
Weed Control ◽  
Ipomoea Batatas ◽  
Sweet Potatoes ◽  
Post Transplant ◽  
Crop Injury ◽  
Prickly Sida ◽  
Methods Of Application ◽  
Large Crabgrass

Clomazone was evaluated preplant incorporated (PPI) or post-transplant (PT) for weed control in sweet potatoes. No crop injury by clomazone was detected. Clomazone controlled (≥90%). broadleaf signalgrass, large crabgrass, barnyardgrass, and prickly sida at all rates and methods of application (MOA). Common cocklebur was controlled (≥93%) by clomazone at 1.1 kg ai ha-1applied PT or at 3.4 kg ai ha-1PPI in 1988 and at all rates and MOA in 1989. Clomazone did not control carpetweed.

The Basis for Selectivity of Root-Applied Ethofumesate in Sugarbeet (Beta vulgaris) and Three Weed Species

Weed Science ◽  
1982 ◽  
Vol 30 (2) ◽  
pp. 191-194 ◽  
Author(s):  
David N. Duncan ◽  
William F. Meggitt ◽  
Donald Penner
Keyword(s):  
Beta Vulgaris ◽  
Chenopodium Album ◽  
Leaf Tissue ◽  
Amaranthus Retroflexus ◽  
Ambrosia Artemisiifolia ◽  
Weed Species ◽  
Common Ragweed ◽  
Common Lambsquarters ◽  
Redroot Pigweed ◽  
Nutrient Culture

The absorption, translocation, and metabolism of 14C-ethofumesate [(±)-2-ethoxy-2,3-dihydro-3,3-dimethyl-5-benzofuranyl methanesulfonate] in sugarbeet (Beta vulgaris L.), common ragweed (Ambrosia artemisiifolia L.), redroot pigweed (Amaranthus retroflexus L.), and common lambsquarters (Chenopodium album L.) were studied as possible bases for selectivity of preemergence-applied ethofumesate. The sensitive redroot pigweed and common lambsquarters plants translocated more 14C-ethofumesate from nutrient culture to the leaf tissue than did the tolerant sugarbeet and common ragweed. The radioactivity was more highly concentrated in sugarbeet and common ragweed roots. The rapid metabolism of ethofumesate by sugarbeet and common ragweed, particularly that which accumulated in the leaf tissue, appeared related to tolerance.

Weed Management in Cotton with CGA-362622, Fluometuron, and Pyrithiobac

2004 ◽  
Vol 18 (2) ◽  
pp. 268-276 ◽  
Author(s):  
Ian C. Burke ◽  
John W. Wilcut
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Management Systems ◽  
Cotton Lint ◽  
Common Ragweed ◽  
Common Lambsquarters ◽  
Pitted Morningglory ◽  
Methylarsonic Acid ◽  
Prickly Sida ◽  
Smooth Pigweed

An experiment was conducted at five locations in North Carolina during 2000 and 2001 to evaluate weed control, crop injury, and cotton yield. Weed management systems included different combinations of pyrithiobac preemergence (PRE), fluometuron PRE, CGA-362622 postemergence (POST), pyrithiobac POST, and monosodium salt of methylarsonic acid (MSMA) plus prometryn applied late POST-directed (LAYBY). At Goldsboro in 2000, cotton was injured 74 to 78% by CGA-362622 POST when evaluated 4 to 7 d after treatment (DAT). Injury at Clayton, Goldsboro, and Lewiston in 2001 and Rocky Mount in 2000 was less than 16% 4 to 7 DAT with the same treatment and was not apparent by 62 DAT. CGA-362622 controlled common lambsquarters, common ragweed, Palmer amaranth, sicklepod, smooth pigweed, andIpomoeaspecies including entireleaf, ivyleaf, and pitted morningglory, and the addition of pyrithiobac to the herbicide system, either PRE or POST, increased control ofAmaranthusspecies, jimsonweed, and prickly sida. CGA-362622 did not control jimsonweed or prickly sida. Fluometuron PRE, pyrithiobac PRE, and MSMA plus prometryn LAYBY were beneficial for increasing weed control and cotton lint yields. Prometryn plus MSMA LAYBY increased control of common ragweed, entireleaf morningglory, jimsonweed, pitted morningglory, and smooth pigweed and provided higher cotton yields than similar systems without a LAYBY. The greatest weed control and greatest cotton lint yields required complete weed management systems that included a combination of PRE, POST, and LAYBY treatments.

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