Biochar Decreases Atrazine and Pendimethalin Preemergence Herbicidal Activity

Soni, Neeta; León, Ramón G.; Erickson, John E.; Ferrell, Jason A.; Silveira, Maria L.

doi:10.1614/wt-d-14-00142.1

Cited by 19 publications

(14 citation statements)

References 29 publications

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“…Pendimethalin is a soil-applied dinitroaniline herbicide used for the control of some broadleaf and grass weeds by inhibiting mitosis. A study from the USA suggested that the use of biochar as a soil amendment could decrease pendimethalin efficacy by adsorbing a significant amount of the herbicide [35]. In another study similar to our study, pendimethalin application (1 and 2 kg ai/ha) in the presence of rice residue cover resulted in lower control of Cyperus iria L. than in the absence of residue 15 .…”

Section: Gr Gs 0 T/ha 3 T/ha 6 T/ha 0 T/ha 3 T/ha 6 T/hasupporting

confidence: 78%

Glyphosate Resistance in Sonchus oleraceus and Alternative Herbicide Options for Its Control in Southeast Australia

Chauhan

Jha

2020

Sustainability

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Sonchus oleraceus is becoming a hard-to-control weed in Australian cropping systems, especially in glyphosate-tolerant cotton and during summer fallows. Several biotypes of this weed have developed resistance to glyphosate as a result of common management practices under conservation agriculture systems in the country. A series of pot experiments were conducted to evaluate the effect of temperature on glyphosate efficacy and performance of several post-emergence and pre-emergence herbicides on a glyphosate-resistant (GR) and a glyphosate-susceptible (GS) biotype of S. oleraceus. At low temperatures (19–24 °C), no plants of the GS biotype survived glyphosate application at 570 g/ha; however, in the high-temperature regime (28–30 °C), 83% of the plants survived this rate of glyphosate. Similarly, for the GR biotype, up to 58% of the plants survived at 2280 g/ha of glyphosate when applied during the high-temperature regime and no plants survived this rate during the low-temperature regime. A number of post-emergence herbicides were found to be effective for S. oleraceus control. However, herbicide application delayed to the six-leaf stage compared with the four-leaf stage reduced control, especially for bromoxynil and saflufenacil herbicides. Glufosinate and paraquat were the most effective herbicides for S. oleraceus control, resulting in no seedling survival for both biotypes. Isoxaflutole, pendimethalin or s-metolachlor efficacy was not reduced by the presence of crop residue, suggesting that these herbicides could be used to control S. oleraceus in conservation agriculture systems. The results of this study suggest that growers will need to reduce over-reliance on glyphosate for weed control in summer fallows and use alternative post-emergence herbicides.

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Section: Gr Gs 0 T/ha 3 T/ha 6 T/ha 0 T/ha 3 T/ha 6 T/hasupporting

confidence: 78%

Glyphosate Resistance in Sonchus oleraceus and Alternative Herbicide Options for Its Control in Southeast Australia

Chauhan

Jha

2020

Sustainability

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“…[13,30,49] Other studies have shown higher sorption of neutral herbicides (treflan and pendimethalin). [32,51] Acidic herbicides, like 2,4-D, are less sorbed to soil when compared with slightly positively charged herbicides like atrazine, but sorption also is influenced by soil organic matter content and pH. [52] Kearns et al [53] reported that 2,4-D sorption to biochar (feedstocks of bamboo, pine, or corn cobs) depended on initial biochar production temperature, with greater sorption to biochars produced at higher temperatures or undergoing longer pyrolysis times.…”

Section: Discussionmentioning

confidence: 99%

“…Our germination assay results also are similar to previous studies that reported reduced herbicide uptake or weed efficacy when soils were amended with biochar. [31,32,51] For example, Nag et al [32] reported that straw biochar applied at 0.5 or 1% decreased bioavailability of atrazine and trifluralin in calcarosol and ferrosol soils types. Soni et al [51] reported a 75% reduction in weed control in the field studies with atrazine applied preemergence to soils amended with 0.5 kg m ¡2 biochar.…”

Section: Discussionmentioning

confidence: 99%

Maize, switchgrass, and ponderosa pine biochar added to soil increased herbicide sorption and decreased herbicide efficacy

Clay

Krack

Bruggeman

et al. 2016

Journal of Environmental Science and Health, Part B

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Biochar, a by-product of pyrolysis made from a wide array of plant biomass when producing biofuels, is a proposed soil amendment to improve soil health. This study measured herbicide sorption and efficacy when soils were treated with low (1% w/w) or high (10% w/w) amounts of biochar manufactured from different feedstocks [maize (Zea mays) stover, switchgrass (Panicum vigatum), and ponderosa pine (Pinus ponderosa)], and treated with different post-processing techniques. Twenty-four hour batch equilibration measured sorption of (14)C-labelled atrazine or 2,4-D to two soil types with and without biochar amendments. Herbicide efficacy was measured with and without biochar using speed of seed germination tests of sensitive species. Biochar amended soils sorbed more herbicide than untreated soils, with major differences due to biochar application rate but minor differences due to biochar type or post-process handling technique. Biochar presence increased the speed of seed germination compared with herbicide alone addition. These data indicate that biochar addition to soil can increase herbicide sorption and reduce efficacy. Evaluation for site-specific biochar applications may be warranted to obtain maximal benefits without compromising other agronomic practices.

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“…This suggested that atrazine was irreversible sorbed by biochar and moderately sorbed by tire chips. Biochar amendments to soils reduced weed control by atrazine up to 75% [46], suggesting that biochar is an effective sorbent for atrazine when added to the soil. The low desorption from limestone, and perhaps steel slag, may have been due to the low overall amount of atrazine sorbed by these materials.…”

Section: Desorption Stepmentioning

confidence: 99%

Atrazine Sorption by Biochar, Tire Chips, and Steel Slag as Media for Blind Inlets: A Kinetic and Isotherm Sorption Approach

Gonzalez¹,

Shipitalo²,

Smith³

et al. 2016

JWARP

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Surface inlets are installed in subsurface drainage systems to reduce ponding duration and surface runoff, but can contribute to water quality concerns by allowing water to directly enter buried drains. Blind inlets consist of perforated pipes covered with gravel and are separated from an overlying sand layer by a geotextile membrane and have been shown to be more effective in reducing losses of sediment, nutrients, and pesticides than typical tile line risers. In this study, we investigated whether the effectiveness of blind inlets to sorb pollutants, with emphasis on the herbicide atrazine, could be further improved by amended them with materials other than limestone. The media, shredded tires (tire chips), electric arc steel furnace slag (steel slag), and oak-derived biochar were chosen because they are readily available, inexpensive, and do not present environmental concerns. Kinetic sorption and isotherms were determined to ascertain atrazine sorption by these materials, in addition to testing for potential metal leaching using the Synthetic Precipitation Leaching Procedure (SPLP) and the Toxicity Characteristic Leaching Procedure (TCLP). The kinetic data were fitted using pseudo first-and second-order reaction equations and indicated that atrazine sorption rate was 38 times faster and equilibrium was reached 5 times earlier for biochar than tire chips. The 24-h sorption isotherm data were fitted to the Freundlich sorption equation. The sorption coefficient for biochar was higher than for tire chips, steel slag, and limestone. Per the SPLC and TLCP tests, there was no leaching of heavy metals at levels of environmental concern. Our results suggested that the effectiveness of blind inlets as well as other conservation practices that include filter media such as rain gardens and filter socks could be improved by incorporating more reactive materials than sand and gravel with biochar being a particularly effective alternative.

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Biochar Decreases Atrazine and Pendimethalin Preemergence Herbicidal Activity

Cited by 19 publications

References 29 publications

Glyphosate Resistance in Sonchus oleraceus and Alternative Herbicide Options for Its Control in Southeast Australia

Glyphosate Resistance in Sonchus oleraceus and Alternative Herbicide Options for Its Control in Southeast Australia

Maize, switchgrass, and ponderosa pine biochar added to soil increased herbicide sorption and decreased herbicide efficacy

Atrazine Sorption by Biochar, Tire Chips, and Steel Slag as Media for Blind Inlets: A Kinetic and Isotherm Sorption Approach

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