Interference of Redroot Pigweed (Amaranthus retroflexus) and Robust Foxtail (Setaria viridisvar.robusta-albaor var.robusta-purpurea) in Soybeans (Glycine max)

Orwick, P. L.; Schreiber, M. M.

doi:10.1017/s0043174500046117

Cited by 42 publications

(37 citation statements)

References 22 publications

(9 reference statements)

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“…Natural weed mixture plots were 95% grass species and 5% broadleaf. All weed species had relatively high densities during 1992 with respect to previous research on interference in soybeans(Coble and Ritter 1978;Coble et al 1981;Harrison 1990;Harrison et al 1985;Henry and Bauman 1989;Orwick and Schrieber 1979;Quakenbush and Andersen 1984;Stoller and Woolley 1985) (Table 1) . In 1993, eastern black nightshade, common lambsquarters, smartweed spp., and pigweed spp.…”

mentioning

confidence: 70%

Field evaluation of soybean (Glycine max) genotypes for weed competitiveness

et al. 1997

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In the first of 2 field studies, weed biomass and soybean seed yield were used to evaluate 16 soybean genotypes for competitive ability against 12 weed species at Rosemount, MN, in 1992 and 1993. The yield and ranking of soybean genotypes often varied with the weed species. Grass weed species reduced yields the most, and small-seeded broadleaf weeds reduced yields the least across years. ‘Parker’ was highly competitive, as it suppressed weed biomass and produced high soybean yield. ‘Kato,’ ‘Kasota,’ ‘Dawson,’ and ‘Glenwood’ minimized weed biomass and maintained soybean yield while in competition with grass weeds but yielded poorly relative to other soybean genotypes in weed-free conditions. ‘Lambert’ produced high soybean yield in weed-free conditions, but yield dropped markedly when in competition with grass weeds. ‘Grande,’ ‘Heifeng 25,’ and ‘Norman’ soybeans were poor competitive genotypes in weedy situations and low yielding in weed-free conditions. A 2nd field study conducted at Rosemount and St. Paul, MN, during 1993 evaluated 16 soybean genotypes under 4 levels and durations of weed pressure for weed competitiveness. Parker, ‘Sturdy,’ and M89-794 were most competitive in suppressing weed biomass and producing high yields. Lambert yielded fairly well but allowed high weed biomass. M89-1743, M89-1006, ‘Archer,’ and ‘Ozzie’ yielded poorly and did not sup press weed biomass production. No relationship was found between weed competitiveness and soybean canopy area, height, and volume measured 30–45 d after planting (DAP).

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confidence: 70%

Field evaluation of soybean (Glycine max) genotypes for weed competitiveness

et al. 1997

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“…(18), Venice mallow (Hibiscus trionum L.) (5,6), pigweeds (Amaranthus spp.) (12,14), common ragweed (Ambrosia artemisiifo!ia L.) (4); hemp sesbania (Sesbania exalt at a (Raf.) Cory) (l 0), sicklepod (Cassia obtusifo!ia L.) (17), prickly sida (Sida spinosa L.) (6), Pennsylvania smartweed (Polygonum pensylvanicum L.) (3), and velvetleaf (Abutilon theophrasti Medic) (6,7,13) have each reduced soybean yields.…”

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confidence: 99%

Competition of Jimsonweed with Soybean¹

Kirkpatrick¹,

Wax²,

Stoller

1983

Agronomy Journal

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Jimsonweed (Datura stramonium L.) is a broadleaf weed that has become increasingly severe in Midwest soybean (Glycine max (L.) Merr.) fields (9, 14). Knowledge of the competitive effects of this weed with soybean would be helpful in developing production practices to minimize losses. Our objectives were to determine the response of soybean (cv. Wells) stand and seed yield to (a) various jimsonweed densities, (b) different emergence dates of jimsonweed, and (c) various durations of jimsonweed competition and to compare the effectiveness of bentazon [3‐isopropyl‐1H‐2,1,3‐benzothiadiazin‐4(3H)‐one 2,2‐dioxide] in controlling jimsonweed to that of hand weeding. Greater densities of jimsonweed resulted in greater losses in soybean yields. Jimsonweed at a low density of 0.3 plants m−1 of row reduced yield by as much as 8%, while jimsonweed at a higher density of 1.6 plants m−1 of row reduced yield by as much as 24%. Increased delay of jimsonweed emergence following soybean emergence markedly reduced soybean yield losses. Jimsonweed at a density of 1.6 plants m−1 of row emerging 2 and 4 weeks after soybean emergence decreased yields by 7 and 3%, respectively, compared to a 23% reduction in yield when jimsonweed emerged with soybean. As duration of competition increased, yields decreased. At a density of 1.6 plants m−1 of row jimsonweed competing with soybean for 2 and 4 weeks reduced yields up to 7 and 14%, respectively. Jimsonweed competing with soybean for the full season reduced yield up to 41%. Soybean stand was not affected by jimsonweed density, time of emergence, or duration of competition. Bentazon was just as effective as hand removal for terminating jimsonweed competition at all application dates.

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“…Species, density, and time of emergence with respect to the crop determine the relative competitiveness of pigweed species [11][12][13][14]. Interference of pigweed species including common waterhemp (Amaranthus rudis Sauer) [15][16][17], Palmer amaranth [11,17,18], and redroot pigweed (Amaranthus retroflexus L.) [14,17,[19][20][21][22] has been evaluated in soybean. Soybean yield reduction as a result of interference increased from 17% to 68% with an increase in Palmer amaranth density from 0.33 to 10 plants m −1 of row length [11].…”

Section: Introductionmentioning

confidence: 99%

Interference of Selected Palmer Amaranth (Amaranthus palmeri) Biotypes in Soybean (Glycine max)

Chandi

Jordan

York

et al. 2012

International Journal of Agronomy

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Palmer amaranth (Amaranthus palmeriS. Wats.) has become difficult to control in row crops due to selection for biotypes that are no longer controlled by acetolactate synthase inhibiting herbicides and/or glyphosate. Early season interference in soybean [Glycine max(L.) Merr.] for 40 days after emergence by three glyphosate-resistant (GR) and three glyphosate-susceptible (GS) Palmer amaranth biotypes from Georgia and North Carolina was compared in the greenhouse. A field experiment over 2 years compared season-long interference of these biotypes in soybean. The six Palmer amaranth biotypes reduced soybean height similarly in the greenhouse but did not affect soybean height in the field. Reduction in soybean fresh weight and dry weight in the greenhouse; and soybean yield in the field varied by Palmer amaranth biotypes. Soybean yield was reduced 21% by Palmer amaranth at the established field density of 0.37 plant m−2. When Palmer amaranth biotypes were grouped by response to glyphosate, the GS group reduced fresh weight, dry weight, and yield of soybean more than the GR group. The results indicate a possible small competitive disadvantage associated with glyphosate resistance, but observed differences among biotypes might also be associated with characteristics within and among biotypes other than glyphosate resistance.

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Interference of Redroot Pigweed (Amaranthus retroflexus) and Robust Foxtail (Setaria viridisvar.robusta-albaor var.robusta-purpurea) in Soybeans (Glycine max)

Cited by 42 publications

References 22 publications

Field evaluation of soybean (Glycine max) genotypes for weed competitiveness

Field evaluation of soybean (Glycine max) genotypes for weed competitiveness

Competition of Jimsonweed with Soybean¹

Interference of Selected Palmer Amaranth (Amaranthus palmeri) Biotypes in Soybean (Glycine max)

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Interference of Redroot Pigweed (Amaranthus retroflexus) and Robust Foxtail (Setaria viridisvar.robusta-albaor var.robusta-purpurea) in Soybeans (Glycine max)

Cited by 42 publications

References 22 publications

Field evaluation of soybean (Glycine max) genotypes for weed competitiveness

Field evaluation of soybean (Glycine max) genotypes for weed competitiveness

Competition of Jimsonweed with Soybean1

Interference of Selected Palmer Amaranth (Amaranthus palmeri) Biotypes in Soybean (Glycine max)

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Competition of Jimsonweed with Soybean¹