Allelopathic intercrops and its mulch as an integrated weed management strategy for rainfed Bt-transgenic cotton hybrids

Blaise, D.; Manikandan, A.; Verma, Poonam; Nalayini, P.; Chakraborty, Manab; Kranthi, K. R.

doi:10.1016/j.cropro.2020.105214

Cited by 19 publications

(11 citation statements)

References 33 publications

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“…Several studies have indicated that intercropping sorghum with crops provides better weed control and higher yields than their monocrops [104][105][106]. Allelopathy is also associated with other field crops such as corn [107,108], oats (Avena sativa L.), pearl millet (Pennisetum glaucum L.), sesame (Sesamum indicum L.) [109], sunflower [104], and soybean [110]. All of the crops mentioned above showed weed suppression when intercropped with other cereals/legumes/oilseeds.…”

Section: Intercroppingmentioning

confidence: 99%

Crop Diversification for Improved Weed Management: A Review

et al. 2021

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Weeds are among the major constraints to any crop production system, reducing productivity and profitability. Herbicides are among the most effective methods to control weeds, and reliance on herbicides for weed control has increased significantly with the advent of herbicide-resistant crops. Unfortunately, over-reliance on herbicides leads to environmental-health issues and herbicide-resistant weeds, causing human health and ecological concerns. Crop diversification can help manage weeds sustainably in major crop production systems. It acts as an organizing principle under which technological innovations and ecological insights can be combined to manage weeds sustainably. Diversified cropping can be defined as the conscious inclusion of functional biodiversity at temporal and/or spatial levels to improve the productivity and stability of ecosystem services. Crop diversification helps to reduce weed density by negatively impacting weed seed germination and weed growth. Additionally, diversified farming systems are more resilient to climate change than monoculture systems and provide better crop yield. However, there are a few challenges to adopting a diversified cropping system, ranging from technology innovations, government policies, farm-level decisions, climate change, and market conditions. In this review, we discuss how crop diversification supports sustainable weed management, the challenges associated with it, and the future of weed management with respect to the diversification concept.

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Section: Intercroppingmentioning

confidence: 99%

Crop Diversification for Improved Weed Management: A Review

et al. 2021

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“…Research involving other cover crop species has also been published in recent years. Blaise et al [87], evaluating twelve different intercrops over 5 years in cotton and found an average reduction of 43-71% of weed emergence and a 91-96% reduction of weed biomass compared to the control. Among intercrops, sun hemp (Crotalaria juncea L.) on one hand, showed the highest phytotoxicity with a significant suppression of purple nutsedge (Cyperus rotundus L.) and smooth joyweed (Alternanthera paronychioides A.…”

Section: Intercroppingmentioning

confidence: 99%

Crop Allelopathy for Sustainable Weed Management in Agroecosystems: Knowing the Present with a View to the Future

2021

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In the face of yield losses caused by weeds, especially in low-input agricultural systems, and environmental pollution due to the excessive use of synthetic herbicides, sustainable weed management has become mandatory. To address these issues, allelopathy, i.e., the biochemical phenomenon of chemical interactions between plants through the release of secondary metabolites into the environment, is gaining popularity. Although many important crops are known for their allelopathic potential, farmers are still reluctant to use such knowledge practically. It is therefore important to assist advisors and farmers in assessing whether allelopathy can be effectively implemented into an eco-friendly weed management strategy. Here, we aim to give a comprehensive and updated review on the herbicidal potential of allelopathy. The major findings are the following: (1) Crops from different botanical families show allelopathic properties and can be cultivated alone or in combination with other non-allelopathic crops. (2) Many allelopathic tools can be adopted (crop rotation, intercropping, cover cropping as living or dead mulches, green manuring, use of allelochemical-based bioherbicides). (3) These methods are highly flexible and feature increased efficiency when combined into an integrated weed management strategy. (4) Recent advances in the chemistry of allelopathy are facilitating the use of allelochemicals for bioherbicide production. (5) Several biotechnologies, such as stress induction and genetic engineering techniques, can enhance the allelopathic potential of crops or introduce allelopathic traits de novo. This review shows how important the role of allelopathy for sustainable weed management is and, at the same time, indicates the need for field experiments, mainly under an integrated approach. Finally, we recommend the combination of transgenic allelopathy with the aforementioned allelopathic tools to increase the weed-suppressive efficacy of allelopathy.

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“…Several studies have indicated that intercropping sorghum with crops provides better weed control and higher yields than their monocrops [89][90][91]. Allelopathy is also associated with other field crops such as corn [92,93], oats (Avena sativa), pearl millet (Pennisetum glaucum L), sesame (Sesamum indicum) [94], sunflower [89], and soybean [95]. All of the above-mentioned crops showed weed suppression when intercropped with other cereals/legumes/oilseeds.…”

Section: Intercroppingmentioning

confidence: 99%

Crop Diversification for Improved Weed Management: A Review

Sharma¹,

Shrestha²,

Kunwar³

et al. 2021

Preprint

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Weeds are among the major constraints to any crop production system, reducing productivity and profitability. Herbicides are among the most effective methods to control weeds, and reliance on herbicides for weed control has increased significantly with the advent of herbicide-resistant crops. Unfortunately, over-reliance on herbicides leads to environmental-health issues and herbicide-resistant weeds, causing human-health and ecological concerns. Crop diversification can help manage weeds sustainably in major crop production systems. It acts as an organizing principle under which technological innovations and ecological insights can be combined to manage weeds sustainably. Diversified cropping can be defined as the conscious inclusion of functional biodiversity at temporal and/or spatial levels to improve the productivity and stability of ecosystem services. Crop diversification helps to reduce weed density by negatively impacting weed seed germination and weed growth. Additionally, diversified farming systems are more resilient to climate change than monoculture systems and provide better crop yield. However, there are a few challenges to adopting a diversified cropping system, which ranges from technology innovations, government policies, farm-level decisions, climate change, and market conditions. In this review, we discuss how crop diversification supports sustainable weed management, the challenges associated with it, and the future of weed management with respect to the diversification concept.

show abstract

Allelopathic intercrops and its mulch as an integrated weed management strategy for rainfed Bt-transgenic cotton hybrids

Cited by 19 publications

References 33 publications

Crop Diversification for Improved Weed Management: A Review

Crop Diversification for Improved Weed Management: A Review

Crop Allelopathy for Sustainable Weed Management in Agroecosystems: Knowing the Present with a View to the Future

Crop Diversification for Improved Weed Management: A Review

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