Estimating the Reduction in Cover Crop Vitality Followed by Pelargonic Acid Application Using Drone Imagery

Ganji, Eliyeh; Grenzdörffer, Görres; Andert, Sabine

doi:10.3390/agronomy13020354

Cited by 3 publications

(5 citation statements)

References 50 publications

(78 reference statements)

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“…Due to its rapid effect, PA efficacy was higher compared with other treatments at the beginning and until 7 th day after application, but then declined over time due to the occurrence of regrowth. The findings of previous research on both annual and perennial species have demonstrated that PA reaches its maximum efficacy within several hours of application and remains effective for up to one week, although the plant regrowth subsequently reduces its efficacy (Muñoz et al, 2020;Travlos et al, 2020;Ganji et al, 2022;Muñoz et al, 2022;Pannacci et al, 2022;Ganji et al, 2023;Loddo et al, 2023).…”

Section: Discussionmentioning

confidence: 97%

The effect of two-year application of pelargonic acid on the growth of Cirsium arvense (L.) Scop. and Sonchus arvensis L

Ganji,

Andert

2024

Front. Agron.

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Synthetic herbicides are used for perennial weed management, but owing to environmental and health concerns they face increasing regulatory restrictions. Consequently, there is growing interest in ecologically friendly alternatives including bio-herbicides based on natural compounds such as the active ingredient pelargonic acid (PA). PA acts as a broad-spectrum non-selective contact herbicide. However, when used as a contact herbicide, regrowth of the aboveground parts of plants still presents a challenge. The aim of this study was to investigate the control effect of a two-year application of PA on perennial weeds. The study was conducted between spring 2020 and autumn 2021 as a semi-field experiment. The factors were two levels of weed species (Cirsium arvense and Sonchus arvensis), three levels of herbicide treatment (untreated control, PA, and glyphosate), and three levels of initial ramet size (5, 10, and 15 cm). The results showed that a two-year application of PA increased its efficacy on C. arvense and S. arvensis when combined with the smaller initial ramet size (5 cm), but did not prevent regrowth in either species. PA efficacy was greater on C. arvense than on S. arvensis. The plant coverage decreased by 24 % when the initial ramet size was 5 cm for C. arvense, while for S. arvensis with the same initial ramet size it was reduced by just 4 %. For PA-treated C. arvense with an initial ramet size of 5 cm, aboveground biomass and belowground biomass were reduced by 43 % and 22 % respectively. In S. arvensis, the reductions in aboveground and belowground biomass for an initial ramet sizes of 5 cm were 13 % and 12 % respectively. In general, PA efficacy was not as high as glyphosate efficacy for both species. In conclusion, the results revealed that after PA application the regrowth of shoots from the creeping roots in C. arvensis and S. arvensis decreased when the initial ramet size was 5 cm. This reduction suggests that PA efficacy on these plants increases when it is applied repeatedly on the same patches with smaller initial root fragments.

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Section: Discussionmentioning

confidence: 97%

The effect of two-year application of pelargonic acid on the growth of Cirsium arvense (L.) Scop. and Sonchus arvensis L

Ganji,

Andert

2024

Front. Agron.

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“…Another option is using herbicides like pelargonic acid for cover crop desiccation. Ganji et al, 2023 found it reasonably effective within a week, but further research is needed to ensure its suitability for on-farm use and to refine technical application details. Gaba et al (2018) showed that the effect of crop competition on the weed assemblage was much stronger than the effect of nitrogen fertiliser and even weed control.…”

Section: Termination Of Cover Cropsmentioning

confidence: 99%

Section: Options For Reducing Glyphosate Use In Europementioning

confidence: 99%

“…In the case of a total ban of glyphosate, and where mechanical weed control is not possible or desirable, it will be necessary to use other broad‐spectrum herbicides. Pelargonic acid may also be used, though it is generally recognised to have lower efficacy and higher costs than glyphosate (Ganji et al, 2023).…”

Section: Options For Reducing Glyphosate Use In Europementioning

confidence: 99%

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Current and future glyphosate use in European agriculture

Neve,

Matzrafi,

Ulber

et al. 2024

Weed Research

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There has been a longstanding and contentious debate about the future of glyphosate use in the European Union (EU). In November 2023, the European Commission approved the renewal of the use registration for glyphosate for a further 10 years. Nevertheless, the EU Farm to Fork strategy calls for a 50% reduction in pesticide use by 2030. In November 2022, the European Weed Research Society organised a 2 day workshop to identify critical glyphosate uses in current EU cropping systems and to review the availability of glyphosate alternatives. Workshop participants identified four current, critical uses in EU cropping systems; control and management of perennial weeds, weed control in conservation agriculture, vegetation management in tree and vine crops and herbicide resistance management. There are few herbicide alternatives that provide effective, economic, broad‐spectrum control of weeds, particularly perennial weeds. Mechanical weed control, and in particular, soil cultivation is the most obvious glyphosate alternative. However, this is not possible in conservation agriculture systems and, in general, increased soil cultivation has negative impacts for soil health. Emerging technologies for precision weed control can enable more targeted use of glyphosate, greatly reducing use rates. These technologies also facilitate the use and development of alternative targeted physical weed control (e.g. tillage, lasers, electricity), reducing the energy and environmental costs of these approaches. In tree crops, the use of organic and inorganic mulches can reduce the need for glyphosate use. In general, reduced use of glyphosate will require an even greater focus on integrated weed management to reduce weed establishment in agroecosystems, increase weed management diversity and limit the use of alternative resistance‐prone herbicides.

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“…These versatile machines, known for their stability, vertical takeoff and landing capabilities, and relatively simple mechanical structure, have become increasingly indispensable in scenarios where human intervention is either too risky or impractical. Notable for their deployment in diverse environments-ranging from the precision-required tasks in agriculture [2][3][4][5][6] to the hazardous zones of natural disasters-Quadrotors stand at the forefront of technological innovation.…”

Section: Introductionmentioning

confidence: 99%

Critically Leveraging Theory for Optimal Control of Quadrotor Unmanned Aircraft Systems

Pham,

Han

2024

Applied Sciences

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In the dynamic realm of Unmanned Aerial Vehicles (UAVs), and, more specifically, Quadrotor drones, this study heralds a ground-breaking integrated optimal control methodology that synergizes a distributed framework, predictive control, H-infinity control techniques, and the incorporation of a Kalman filter for enhanced noise reduction. This cutting-edge strategy is ingeniously formulated to bolster the precision of Quadrotor trajectory tracking and provide a robust countermeasure to disturbances. Our comprehensive engineering of the optimal control system places a premium on the accuracy of orbital navigation while steadfastly ensuring UAV stability and diminishing error margins. The integration of the Kalman filter is pivotal in refining the noise filtration process, thereby significantly enhancing the UAV’s performance under uncertain conditions. A meticulous examination has disclosed that, within miniature Quadrotors, intrinsic forces are trivial when set against the formidable influence of control signals, thus allowing for a streamlined system dynamic by judiciously minimizing non-holonomic behaviors without degrading system performance. The proposed control schema, accentuated by the Kalman filter’s presence, excels in dynamic efficiency and is ingeniously crafted to rectify any in-flight model discrepancies. Through exhaustive Matlab/Simulink simulations, our findings validate the exceptional efficiency and dependability of the advanced controller. This study advances Quadrotor UAV technology by leaps and bounds, signaling a pivotal evolution for applications that demand high-precision orbital tracking and enhanced noise mitigation through sophisticated nonlinear control mechanisms.

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Estimating the Reduction in Cover Crop Vitality Followed by Pelargonic Acid Application Using Drone Imagery

Cited by 3 publications

References 50 publications

The effect of two-year application of pelargonic acid on the growth of Cirsium arvense (L.) Scop. and Sonchus arvensis L

The effect of two-year application of pelargonic acid on the growth of Cirsium arvense (L.) Scop. and Sonchus arvensis L

Current and future glyphosate use in European agriculture

Critically Leveraging Theory for Optimal Control of Quadrotor Unmanned Aircraft Systems

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