Management of pigweed (<i>Amaranthus</i>spp.) in grain sorghum with integrated strategies

Hay, Marshall M.; Dille, J. Anita; Peterson, Dallas E.

doi:10.1017/wet.2019.64

Cited by 3 publications

(1 citation statement)

References 54 publications

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“…Additionally, waterhemp under 99% shade had mortalities of 97% and 84%, respectively, in May and June. Hay et al (2019) reported that appropriate herbicide strategies resulted in 97% control of Amaranthus species in Kansas grain sorghum [Sorghum bicolor (L.) Moench] across six site-years, while a winter wheat cover crop provided only a 50 percentage point reduction in pigweed density and biomass at three out of six site-years. Similar results were found in this study, as one of the two sites with established cover crops had reductions of 45 percentage points when a cereal rye cover crop was utilized compared to the control treatment.…”

Section: Cover Crop and Weed Biomass Prior To Cover Crop Terminationmentioning

confidence: 99%

Utilizing cover crops for weed suppression within buffer areas of 2,4-D-resistant soybean

et al. 2021

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Cover crops can be utilized to suppress weeds via direct competition for sunlight, water, and soil nutrients. Research was conducted to determine if cover crops can be used in label mandated buffer areas in 2,4-D-resistant soybean cropping systems. Delaying termination of cover crops containing cereal rye to at, or after, soybean planting resulted in a 25 to over 200 percentage point increase in cover crop biomass compared to a control treatment. Cover crops generally improved horseweed control when 2,4-D was not used. Cover crops reduced grass densities up to 54% at four of six site-years when termination was delayed to after soybean planting. Cover crops did not reduce giant ragweed densities. Cover crops reduced waterhemp densities by up to 45%. Cover crops terminated at, or after planting were beneficial within buffer areas for control of grassess and waterhemp, but not giant ragweed. Yield reductions of 14 to 41% occurred when cover crop termination was delayed to after soybean planting at three of six site-years. Terminating the cover crops at planting time provided suppression of grasses and waterhemp within buffer areas and had similar yield to the highest yielding treatment in five out of six site-years.

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Section: Cover Crop and Weed Biomass Prior To Cover Crop Terminationmentioning

confidence: 99%

Utilizing cover crops for weed suppression within buffer areas of 2,4-D-resistant soybean

et al. 2021

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Phenological growth stages of Amaranthus palmeri according to the extended BBCH scale

Yuan,

Yin,

Nie

et al. 2024

Annals of Applied Biology

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Amaranthus palmeri S. Watson is a problematic weed that has been encountered almost all over the world because of its stronger adaptability, which causes huge economic losses and local plant diversity decline. As an invasive plant, A. palmeri has been found throughout China. We thus make a code system to describe the phenological growth process of A. palmeri according to the extended BBCH scale to better understand the phenological growth of this weed in China. The growth process of A. palmeri was divided into vegetative growth phases and reproductive growth phases. The vegetative growth phases are composed of seed germination (0), leaf development (1), formation of side shoots (2) and main stem elongation (3). Likewise, the reproductive growth phases include inflorescence emergence (5), blooming (6), fruit development (7), seed maturity (8) and senescence (9). Based on the extended BBCH scale, the first digit stands for the primary growth stages, and the third digit represents the secondary growth stages. In particular, the second digit defines the growth progress: the number 0, means the vegetative growth phases, and the number 1 stands for the reproductive growth phases. Owing to the fact that its seed can germinate multiple times within a year, a general illustration of the phenological development stages of A. palmeri germinating in different months was provided here to describe the growth dynamic characteristic at different times. These data are of great significance to develop effective strategies for weed control and management of A. palmeri.

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Study of Mechanical-Chemical Synergistic Weeding on Characterization of Weed–Soil Complex and Weed Control Efficacy

Huimin

Xue

et al. 2022

Sustainability

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Mechanical-chemical synergy has been proven efficient in weed control. However, characterizing the state of the weed–soil complex after mechanical weeding and revealing its effects on subsequent herbicide application is still challenging, which restricts the implementation of this technology. This paper first presents a method to characterize the state of the weed–soil complex from the perspectives of the fragmentation and composite characteristics. The regrowth of the weed–soil complex and the effects of complemented herbicide-reduced spraying on weed control efficacy and crop yield were then investigated. The results showed that the typical diameters of the weed–soil complexes were 10.67 cm and 2.82 cm after inter-row hoe shovel and intra-row finger weeding, respectively. There were mainly two and four weed–soil complex states after inter-row and intra-row weeding, respectively. The regrowth rate corresponding to the weed–soil complex state with the largest component proportion after inter-row and intra-row weeding was 76.91% and 18.37%, respectively. The additional chemical herbicide sprayed on the weed–soil complex significantly improved the fresh weight control efficacy of 95.12% for the preposed inter-row mechanical weeding and 138.07% for the preposed intra-row mechanical weeding in the maize silking stage. The maize yield of inter-row mechanical–75% chemical application treatment was 9.27% higher than that of chemical treatment. Mechanical weeding creates a suitable weed–soil complex state for subsequent chemical application and improves the synergistic weeding effect.

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Management of pigweed (Amaranthusspp.) in grain sorghum with integrated strategies

Cited by 3 publications

References 54 publications

Utilizing cover crops for weed suppression within buffer areas of 2,4-D-resistant soybean

Utilizing cover crops for weed suppression within buffer areas of 2,4-D-resistant soybean

Phenological growth stages of Amaranthus palmeri according to the extended BBCH scale

Study of Mechanical-Chemical Synergistic Weeding on Characterization of Weed–Soil Complex and Weed Control Efficacy

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