Allelopathy in Agroecosystems

By Harminder Singh, D. Batish, R. Kohli. 2001

172 citations recorded by the source corpus.

Summary Allelopathy plays an important role in the agroecosys-tems leading to a wide array of interactions between crop-crop, crop-weed and tree-crops. Generally, these interactions are harmful to the receiver plants but provide a selective benefit to the donor. Soil microbes play a key role in determining such interactions as they not only alter the nature of allelopathic interactions but also modify the expression of allelochemicals. Soil sickness problem in the croplands could also be attributed to the allelopathic property or even the autotoxicity. The allelochemicals released largely by the plant residues that are left in the fields after the harvest of crops add to the multifarious problems. If properly managed, these residues could be used for controlling weeds and pests. As is true for any chemical based response, allelopathic interactions are also concentration specific. The promotory functions that are inbuilt need to be worked out and exploited. Now a days allelopathic interactions, in general, and the allelochemicals, in particular, are viewed as an important tool for sustainable weed and pest management, and disease control. In this direction, a number of strategies like use of cover or smother or companion crops for weed management, direct use of allelochemicals as natural pesticides, and even the transfer of allelopathic traits/principles to modern day cultivars are being adopted. The purified allelochemicals and/or their derivatives and even the compounds synthesized on their chemistry can be used as novel agrochemicals for sustainable management in an eco-friendly manner. The present paper aims to discuss all the above mentioned roles and aspects of allelopathy in the agroecosystems.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/2a19f351337fdadab632844620962413f95d99a5

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In Plant Science

1. R. Kohli
2. D. Batish
3. Harminder Singh
4. S. Duke
5. L. Weston
6. P. Bhadoria
7. R. Bogatek
8. A. Gniazdowska

Citations in the corpus

• Phenolic allelochemicals released by Chenopodium murale affect the growth, nodulation and macromolecule content in chickpea and pea (2007, background): “A number of studies have suggested that weeds affect the growth and development of other plants including crops by releasing allelopathic chemicals into the immediate soil environment (Singh et al. 2001), and such interactions are very common in the rhizosphere soil (Bais et al. 2004).”
• Allelopathy in agro-ecosystems: a critical review of wheat allelopathy-concepts and implications (2016, unknown): “Preferential utilization of carbon source in soil affects the soil microbial system and expression of allelopathic phenomenon (Singh et al. 2001).”
• Allelopathic Interactions and Allelochemicals: New Possibilities for Sustainable Weed Management (2003, background): “Likewise, cineole, citronellal, and some other monoterpenes of Eucalyptus sp. possess weed-suppressing properties (Kohli et al., 1998b; Singh et al., 2001, 2002a).”
• Weed and Crop Allelopathy (2003, background): “During the last 30 years, the potential impacts of allelopathy on agriculture have been described and discussed in detail (Putnam, 1986; Putnam and Duke, 1978; Putnam and Weston, 1986; Qasem et al., 2001; Rice, 1984; Singh et al., 2001; Weston, 1996).”
• Alternative weed control using the allelopathic effect of natural benzoxazinoids from rye mulch (2008, background): “Therefore, economic and environmental constraints of crop production systems have stimulated interest in alternative weed management strategies (Anaya, 1999; Mortensen et al., 2000; Singh et al., 2001).”
• Allelopathic effect of ginger on seed germination and seedling growth of soybean and chive (2008, background): “It plays a significant role in agroecosystems, and affects the growth, quality and quantity of the produce (Kohli et al., 1998; Singh et al., 2001).”
• Allelopathy: a natural way towards weed management. (2010, background): “Kohli et al. (1998) and Singh et al. (2001) opined that allelopathy refers to any direct or indirect effect of plants on other plants through the release of chemicals and plays an important role in many agro-ecosystems.”