Efficacy and crop selectivity of saflufenacil alone and with partner herbicides for weed control in maize

The recently developed herbicide saflufenacil was evaluated in six field trials between 2008 and 2011 for weed control in maize (Zea mays) crops Trial sites varied considerably in soil characteristics and weed spectrum No phytotoxicity or visual damage symptoms were observed in any of the six cultivars planted When used alone at 70 or 105 g ai/ha saflufenacil provided effective control of annual broadleaf weeds including atrazine and dicambaresistant fathen (Chenopodium album) but had little activity on grass weeds In combination with acetochlor both rates of saflufenacil provided good control of annual grass and broadleaf weeds in all but one trial In crops with a high weed pressure especially grass weeds a follow up postemergence herbicide would be required to maximise control Combinations of saflufenacil with up to 1200 g ai/ha of dimethenamidp were generally less effective than with acetochlor A strong negative relationship was evident between weed density and maize silage or grain yields

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Evaluating the EPA's Comparative Product Performance Testing Guidelines for Herbicides in Snap Bean (Phaseolus vulgaris)

Weed Technology ◽

10.1017/s0890037x00043712 ◽

1998 ◽

Vol 12 (2) ◽

pp. 215-222

Author(s):

Robin R. Bellinder ◽

Marija Arsenovic ◽

Jonathan J. Kirkwyland ◽

Russell W. Wallace

Keyword(s):

Weed Control ◽

Environmental Protection Agency ◽

Performance Testing ◽

Good Control ◽

Field Trials ◽

Weed Species ◽

Snap Bean ◽

Common Lambsquarters ◽

Redroot Pigweed ◽

Product Comparison

Following suggested guidelines developed by the Environmental Protection Agency (EPA), comparative snap bean herbicide performance field trials were conducted from 1993 to 1995 in New York. Data were obtained on crop injury, weed control, and weed biomass, and crop yield, quality, and losses during harvest. Trifluralin, EPTC, and pendimethalin applied preplant incorporated (PPI) and applications of metolachlor applied preemergence (PRE) provided less than adequate control of redroot pigweed, common lambsquarters, and hairy galinsoga. Cultivation improved weed control with PPI and PRE applications. Metolachlor + fomesafen PRE provided good control of hairy galinsoga, adequate redroot pigweed control, and marginal control of common lambsquarters. Fomesafen applied postemergence (POST), combinations of metolachlor applied PRE with fomesafen or bentazon applied POST, and fomesafen + bentazon applied POST adequately controlled the three weed species without cultivation. Herbicide treatments had little measurable impact on snap bean quality or losses during harvest. Information from product comparison trials may be useful in developing recommendations for growers but may prove less than adequate in providing data necessary for a thorough evaluation of the relative benefits of individual herbicides as intended by EPA guidelines. Difficulties were encountered in following the guidelines, and costs of conducting the product comparison trials for a single crop in one growing region exceeded $90,000 over 3 yr.

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INFLUENCE OF HERBICIDES ON WEED MANAGEMENT IN TRUE POTATO

Acta Agronomica Hungarica ◽

10.1556/aagr.49.2001.2.9 ◽

2001 ◽

Vol 49 (2) ◽

pp. 183-187 ◽

Cited By ~ 2

Author(s):

R. Sing ◽

A. K. Verma ◽

J. Pandey

Keyword(s):

Weed Management ◽

Tuber Yield ◽

Chenopodium Album ◽

Good Control ◽

Effective Control ◽

Weed Species ◽

Paddy Straw ◽

Free Treatment ◽

Excellent Control ◽

Hand Weeding

The results obtained showed that there was severe competition between potato and the predominant weed species Coronopus didymus, Chenopodium album, Fumaria parviflora, Melilotus indica and Spergula arvensis. Competition by other weed species was nominal. The maximum reduction in tuber yield due to weed competition was 50.5% in 1997–98 and 63.4% in 1998–99. Weed control treatments lowered the weed density and weed biomass and scaled up tuber yield in both the years, but their effect on weed species differed. Metribuzin killed all the Chenopodium album plants and gave excellent control of Coronopus didymus (94%) and effective control of other weed species. Pendimethalin inhibited the germination of Chenopodium album, gave good control of arvensis and lowered the density of other weed species. Fluchloralin completely inhibited the germination of Fumaria parviflora and gave good control of Chenopodium album and Spergula arvensis, but was least effective against other weed species. The highest yield was recorded in the weed-free treatment, which was significantly superior to all other treatments. Hand weeding + earthing up, isoproturon (1.0 kg/ha), metribuzin and pendimethalin caused an identical increase in tuber yield, which was significantly higher than the increase in the rest of the treatments. Atrazine at 0.25 kg ha –1 resulted in a higher increase than when applied at 0.5 kg ha –1 . Fluchloralin, paraquat and paddy straw mulch boosted up production, but the increase in tuber yield was not significant.

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Weed Control in Sunflower (Helianthus annuus L.) with Soil-applied Herbicides Affected by a Prolonged and Limited rainfall

Poljoprivreda ◽

10.18047/poljo.27.2.1 ◽

2021 ◽

Vol 27 (2) ◽

pp. 3-14

Author(s):

Zvonko Pacanoski ◽

◽

Arben Mehmeti ◽

Keyword(s):

Weed Control ◽

Chenopodium Album ◽

Field Trials ◽

Early Spring ◽

Amaranthus Retroflexus ◽

Soil Conditions ◽

Weed Species ◽

Polygonum Aviculare ◽

Growing Seasons ◽

Solanum Nigrum L

The field trials were carried out in the Bitola and Titov Veles regions during two sunflower growing seasons (2018 and 2019) to estimate a weed control in sunflower with the soil‒applied herbicides, influenced by a prolonged and limited rainfall. Polygonum aviculare L., Solanum nigrum L., Chenopodium album L., Amaranthus retroflexus L., Portulaca oleracea L., and Echinochloa crus-galli (L.) P. Beauv. were the most dominant weeds in both regions. The efficacy of PRE-em herbicides varied among the weed species, treatments, periods of efficacy estimation, regions, and years. The overall performances of the PRE-em herbicides were correlated with weather and soil conditions. The inconsistent weather patterns between the two years of the study likely influenced the weed control. All weeds in 2018 in the Bitola region were poorly controlled (<77% and <62%, 28 and 56 days after application, respectively) due to a higher amount of rainfall (57 mm) during the 10 days of the 1st decade after herbicide application. The herbicide efficacy has only produced a marginal control of weeds in 2019 in the Titov Veles region as well (<68% and <59%, 28 and 56 days after application, respectively), due to the drought conditions observed in this region in early spring and in mid-spring. A PREem application followed by a heavy rainfall resulted in a sunflower injury in the Bitola region in 2018, ranging from 9 to 28% across the PRE-em treatments seven days after emergence. The injuries by oxyfluorfen and dimethenamid-P were more serious (24 and 28%, respectively). The sunflower achene yields for each treatment in both regions generally reflected an overall weed control and crop injury.

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Weed control in intercroping systems with dry bean and cycloxydim-tolerant maize

Acta herbologica ◽

10.5937/actaherb2001025m ◽

2020 ◽

Vol 29 (1) ◽

pp. 25-33

Author(s):

Goran Malidža ◽

Mirjana Vasić ◽

Miloš Rajković ◽

Goran Bekavac

Keyword(s):

Weed Control ◽

Chenopodium Album ◽

Datura Stramonium ◽

Production Method ◽

Field Trials ◽

Limiting Factors ◽

Vegetable Crops ◽

Dry Bean ◽

Special Contribution ◽

Novi Sad

Due to the narrow range of available herbicides, weeds are one of the limiting factors for intercropping of dry bean and maize. Various benefits of this production method have been confirmed by the results of many authors. The aim of this study was to investigate the possibility of using a cycloxydim-tolerant maize hybrid to expand the ability of weed control in intercroping systems with bean. Three-year field trials were conducted from 2015 to 2017, at the Institute of Field and Vegetable Crops in the vicinity of Novi Sad. Cycloxydim-tolerant maize and dry bean were sown mechanically in alternating strips, with one strip consisting of 4 rows of maize and the other strip containing 6 rows of bean. Combinations of herbicides based on dimethenamid-P, linuron, bentazone and cycloxydim were studied. The effect of herbicides on the number of weeds, fresh weed mass and grain yield of bean and maize was evaluated. No phytotoxicity of the herbicides was observed on the crops, indicating the safety of their use in this production system. The most common weeds were Chenopodium album, Datura stramonium and Sorghum halepense developed from rhizomes. Herbicides had a significant effect in reducing the abundance and fresh mass of the above-ground weed parts. A special contribution of the results obtained is the unique ability to control S. halepense using the cycloxydim-based product. Owing to the above-mentioned possibility, a significant reduction in the number and mass of S. halepense shoots developed from rhizomes was achieved (100% in 2015 and 2016, and >90% in 2017). The results of our trials confirm the contribution of the extension of the choice of herbicides with cycloxydim in this system of intercropping with dry bean and cycloxydim-tolerant maize.

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Replace of the EPOST glyphosate with pre herbicides and application of different LPOST glyphosate rates for weed control in established vineyard

Acta agriculturae Slovenica ◽

10.14720/aas.2020.116.2.1910 ◽

2020 ◽

Vol 116 (2) ◽

pp. 299

Author(s):

Zvonko PACANOSKI ◽

Krum BOŠKOV ◽

Arben Beni MEHMETI

Keyword(s):

Weed Control ◽

Cynodon Dactylon ◽

Lolium Multiflorum ◽

Chenopodium Album ◽

Field Trials ◽

Early Summer ◽

Xanthium Strumarium ◽

Summer Period ◽

Herbicide Treatments ◽

Annual Weeds

Two-year field trials were conducted at two winegrowing districts (Kavadarci and Skopje in 2016 and 2017) to evaluate wheather oxyfluorfen, pendimethalin and flazasulfuron can replace early post-emergence (EPOST) application of glyphosate in established vineyard until its application in early summer period. The weed vegetation in vineyards in both years was consisted mainly of Chenopodium album L., Setaria viridis (L). Beauv., Papaver rhoeas L., Xanthium strumarium L., Lolium multiflorum Lam., Sorghum halepense (L.) Pers. and Cynodon dactylon (L.) Pers. Pendimethalin, oxyfluorfen and flazasulfuron efficiently reduced predominant annual weeds and S. halepense seedlings in 2017, but not in 2016. PRE herbicides, regardless year, had no significant effect on C. dactylon. Opposite, the efficacy of EPOST applied glyphosate was significantly lower in 2017 compared to 2016. LPOST glyphosate applied at 2.0 l ha-1 provided at least 94 % control of dominant annual broadleaf and grass weeds. LPOST application of glyphosate at 2.0 l ha-1 and glyphosate at 2.0 and 4.0 l ha-1 resulted in unsatisfactory weed control of predominant perennial S. halepense, and C. dactylon, respectively. LPOST glyphosate applied at 4.0 l ha-1 provided control of S. halepense by 84 % or more. LPOST glyphosate applied at 8.0 l ha-1 reduced the amount of S. halepense and C. dactylon at least 97 %. Grapevine yield of both varieties was not lower in all herbicide treatments in 2016 compared with 2017. However, yield in the PRE herbicide treatments fb 2.0 and 4.0 l ha-1 glyphosate was collectively 15-19 % and 17-19 % lower compare to PRE herbicide treatments fb 8.0 l ha-1 glyphosate and standard two applications of glyphosate, respectively for both years and districts. No impacts to grapevine growth were observed from PRE herbicide treatments at either district

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Efficacy of Several Herbicides on Yellow Archangel (Lamiastrum galeobdolon)

Invasive Plant Science and Management ◽

10.1614/ipsm-d-13-00067.1 ◽

2014 ◽

Vol 7 (2) ◽

pp. 269-277

Author(s):

Timothy W. Miller ◽

Alison D. Halpern ◽

Frances Lucero ◽

Sasha H. Shaw

Keyword(s):

Pacific Northwest ◽

Good Control ◽

Relative Sensitivity ◽

Field Trials ◽

Effective Control ◽

Clove Oil ◽

Greenhouse Trial ◽

The Pacific ◽

Lamiastrum Galeobdolon ◽

Forest Floor Vegetation

AbstractYellow archangel is a twining perennial species that produces a dense evergreen canopy and may negatively affect forest floor vegetation. Because it is spreading rapidly in the Pacific Northwest (PNW), greenhouse and field trials were conducted on yellow archangel to determine its relative sensitivity to several herbicides. Products that slowed or prevented yellow archangel regrowth at 9 mo after treatment (MAT) in one or both iterations of the greenhouse trial were aminopyralid, diclobenil, glufosinate, imazapyr, isoxaben, metsulfuron, sulfometuron, triclopyr amine, and triclopyr ester + 2,4-D ester. In the field trial at 10 MAT, triclopyr and imazapyr were controlling 81 and 78% of treated yellow archangel, respectively, similar to aminopyralid, glyphosate, and metsulfuron (61 to 65%). Two applications of 20% acetic acid or 20% clove oil were controlling 53% at the same timing. At 13 MAT, only imazapyr and glyphosate were still providing good control of yellow archangel (81 and 80%, respectively), while all other products were controlling the weed at 53% or less. By 7 or 8 MAT after a second application, only imazapyr and glyphosate provided effective control of yellow archangel (86 to 94%).

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Control of Fusarium head blight of winter wheat by artificial and natural infection using new fungicides

Acta Agrobotanica ◽

10.5586/aa.2006.070 ◽

2012 ◽

Vol 59 (2) ◽

pp. 151-162

Author(s):

Olga Treikale ◽

Irina Afanasjeva ◽

Jelena Pugacheva

Keyword(s):

Winter Wheat ◽

Climatic Factors ◽

Natural Infection ◽

Good Control ◽

Field Trials ◽

Septoria Tritici ◽

Effective Control ◽

Head Blight ◽

Leaf Infection ◽

Causative Agents

In Latvia, climatic factors are influential in spreading of Fusarium head blight of cereals caused by Fusarium species. The most significant factor affecting the incidence of the disease in winter wheat is hightened temperature at the time of wheat anthesis. Field trials for the control of the disease in winter wheat were done in 2003-2004 using new fungicides applied at various rates by natural infection and artificial inoculation. Three species of causative agents: Fusarium avenaceum var. herbarum, F. gibbosum, F. culmorum were collected from infected seeds of wheat and used for inoculation of experimental plots at the concentration 106 conidia ml-1 (1:1:1) at the stage of full anthesis. Effective control of the disease was obtained through application of new fungicides with different active ingredient: Prosaro 250 EC (tebuconazole 125 G, prothioconazole 125 G L-1), Input 460 EC (spiroxamine 300 G, prothioconazole 160 G L-1). In conditions of artificial infection by severe attack of Fusarium spp. the application of fungicides containing tebuconazole at T3 gave significant influence on yield of winter wheat through plumpness of grains increase. High efficacy of fungicides against leaf infection with Erysiphe graminis and Drechslera tritici-repentis was also in the trial achieved. Application of fungicide containing cyproconazole and trifloxystrobin at T1 in the trial 2004 gave good control of Septoria tritici, E. graminis and D. triticirepentis.

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Effect of soil incorporation and dose on control of field bindweed(Convolvulus arvensis)with the preemergence bioherbicidePhomopsis convolvulus

Weed Science ◽

10.1017/s0043174500089724 ◽

1998 ◽

Vol 46 (6) ◽

pp. 690-697 ◽

Cited By ~ 2

Author(s):

S. Vogelgsang ◽

A. K. Watson ◽

A. DiTommaso

Keyword(s):

Weed Control ◽

Aboveground Biomass ◽

Soil Surface ◽

Field Trials ◽

Field Conditions ◽

Effective Control ◽

Controlled Environment ◽

Convolvulus Arvensis ◽

Growing Seasons ◽

Field Bindweed

The preemergence efficacy of soil surface applications of aPhomopsis convolvulusgranular formulation to control field bindweed seedlings was compared with its efficacy when inoculum granules were incorporated in soil. In addition, the effect of different doses of soil-applied granules was also determined. Under controlled environment conditions, incorporation of the fungal granules resulted in aboveground biomass reductions between 88 and 96%, with no significant differences observed between incorporation depths of 1.5 and 3 cm. Granule applications on the soil surface were less effective, reducing aboveground biomass 40 to 83%. In a parallel field experiment conducted over two growing seasons, however, surface applications of inoculum granules resulted in greater weed control compared with soil incorporation of the granules. In spring and summer trials conducted in 1996, surface applications resulted in a 93 and 100% aboveground biomass reduction, respectively, whereas incorporated granules reduced biomass 62 and 97%. Similar trends were observed in 1997. Different soil-applied doses ofP. convolvulusdid not affect the level of weed control under both controlled environment and field conditions. In 1995 and 1996 field trials, all rates used (30, 20, and 10 g 0.25m−2plot) resulted in substantial (90 to 100%) field bindweed aboveground biomass reductions. Findings in this study indicate that under field conditions, preemergence applications of the bioherbicideP. convolvuluson the soil surface provide effective control of field bindweed.

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Chemical weed control in lupins

Australian Journal of Experimental Agriculture ◽

10.1071/ea9760394 ◽

1976 ◽

Vol 16 (80) ◽

pp. 394 ◽

Cited By ~ 3

Author(s):

EG Cuthbertson

Keyword(s):

Grain Yield ◽

Dose Rate ◽

Weed Control ◽

Good Control ◽

Field Trials ◽

Lupinus Angustifolius ◽

Broadleaf Species ◽

Annual Weeds

The response of weeds and narrow-leaved lupins (Lupinus angustifolius) to a number of pre-planting, pre-emergence and post-emergence applied herbicides was evaluated in six field trials between 1970 and 1973. Applied six weeks post-emergence, fluometuron and propazine at 0.75, 1.5 and 3.0 kg, carbetamide at 1.5, 2.0 and 3.0 kg, simazine at 1.5 and 3.0 kg, and chlortoluron at 3.0 kg a.i. ha-1 gave good control of annual weeds present. Only carbetamide 1.5, 2.0 and 3.0 kg, propazine 0.75 and 1.5 kg and simazine 1.5 kg a.i. ha-1 increased grain yield. Decreasing yield with increasing dose rate in the case of fluometuron and propazine in this situation suggested some crop toxicity. Applied pre-planting and incorporated, alachlor 1.0 and 2.0 kg, di-allate 0.84 kg, nitralin 0.6 and 1.2 kg and trifluralin 0.56 kg a.i. ha-1 gave good grass control and, in general, increased yield. They had no effect on the majority of broadleaf species present. Applied pre-emergence, alachlor, propazine and simazine at 1.0 and 2.0 kg, fluometuron at 1.0 to 4.0 kg and pronamide at 0.8 and 1.6 kg a.i. ha-1 in general gave good weed control and increased grain yield. All except alachlor affected both grasses and broadleaf species. The results, however, were seriously affected by rainfall incidence. The results are discussed in terms of the response to incorporation, rainfall incidence and temperature on the activity of specific herbicides.

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Weed Control in Dicamba-Resistant Soybean with Glyphosate/Dicamba Applied at Various Doses and Timings

International Journal of Agronomy ◽

10.1155/2020/8903941 ◽

2020 ◽

Vol 2020 ◽

pp. 1-6

Author(s):

Nader Soltani ◽

Christy Shropshire ◽

Peter H. Sikkema

Keyword(s):

Weed Control ◽

Chenopodium Album ◽

Field Trials ◽

Ambrosia Artemisiifolia ◽

Setaria Viridis ◽

Application Timing ◽

Setaria Faberi ◽

Weed Interference ◽

Giant Foxtail ◽

Green Foxtail

Seven field trials were completed over a three-year period (2016 to 2018) in southwestern Ontario, Canada, to assess weed control in conventional-till dicamba-resistant (DR) soybean with glyphosate/dicamba (2 : 1 ratio) applied postemergence (POST) at 3 doses (900, 1350, and 1800 g·ae·ha−1) and 3 application timings (up to 5, 15, and 25 cm weeds). There was minimal soybean injury (≤2%) from treatments evaluated. Glyphosate/dicamba applied at application timing of up to 5, 15, and 25 cm weeds, controlled Amaranthus spp. (pigweed spp.) 87–96, 94–99, and 99%; Ambrosia artemisiifolia (common ragweed) 93–99, 97–99, and 99–100%; Chenopodium album (lambsquarters) 89–99, 95–100, and 99–100%; Echinochloa crus-galli (barnyardgrass) 81–84, 94–96, and 96–97%; Setaria faberi (giant foxtail) 37–90, 77–98, and 99–100%; and Setaria viridis (green foxtail) 94–96, 99, and 99–100%, respectively. Additionally, glyphosate/dicamba applied POST at 900, 1350, and 1800 g·ae·ha−1 controlled Amaranthus spp. 90–97, 95–98, and 97–99%; A. artemisiifolia 95–98, 97–99, and 99–100%; C. album 92–99, 95–100, and 98–100%; E. crus-galli 84–88, 93-94, and 95-96%; S. faberi 74–95, 75–97, and 79–98%; and S. viridis 98, 98–99, and 98–100%, respectively. Weed interference reduced DR soybean yield as much as 51% compared to the highest yielding treatments. Results indicate that glyphosate/dicamba applied POST at the label doses can provide an adequate control of troublesome weeds in DR soybean. Weed control was generally most consistent when glyphosate/dicamba was applied at the highest registered dose in Ontario (1800 g·ae·ha−1) and when weeds were up to 25 cm tall.

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