Allelopathic screening of Malaysian noxious weeds and several medicinal plants as potential alleloherbicides

Abstract

Aim: This research was conducted to assess the allelopathic potential of 100 plants species, including noxious weeds and medicinal plants of Malaysia as donor plant on the growth of Lactuca sativa (lettuce) as the recipient plant. This study was also carried out to justify common weeds found in Malaysia to act as a natural herbicide for weed management through allelopathy phenomenon. Methodology: Weed and medicinal plant species commonly found in Malaysia were identified according to their morphological characteristics. Sandwich method was carried out to determine the allelopathic potential of weed species through leaf litter leachate mechanism. On the other hand, dish pack method was conducted to discover the allelopathic potential of weed species through volatilization pathway. Results: 100 weed species and medicinal plants commonly found in Malaysia inhibited the radicle and hypocotyl growth of L. sativa by both sandwich method and dish pack method. Among 100 weed species, Passiflora foetida showed the maximum inhibitory effects on L. sativa growth in both sandwich and dish pack method. The highest amount of P. foetida leaf litter (50 mg), completely inhibited the growth of radicle and hypocotyl of L. sativa. Volatilization of weed and medicinal plants leaf litter inhibited the growth of L. sativa with increasing distances of lettuce seed with the weed and medicinal plants leaf litter. Interpretation: The findings of this study provides a base line for identifying plants with allelopathic properties for controlling weed propagation.

Allelopathic potential of native species on weeds in Morelos, Mexico associated with the cultivation of corn

“…Las dosis media y bajas de residuos y extractos de A. leptopus fueron las menos inhibitorias, demostrando poca capacidad alelopática. Este resultado confirma la poca actividad encontrada entre unas 100 especies de arvenses estudiadas sobre el crecimiento radicular de Lactuca sativa L., donde se reportaron incluso efectos estimulatorios (Ishak et al, 2021). Aunque invade algunos ecosistemas de forma predominante, sus capacidades invasivas están enmarcada a condiciones de alta humedad, árboles o arbustos que proveen sostén, sombra y suelos arcillosos (Nodza et al, 2021).…”

Study of Sambiloto Andrographis paniculate Ness. Extract as an Eco-Friendly Biocontrol on Weed Seed Germination and Growth

“…The term allelopathy is classified as a biochemical interaction that involves both suppression and activation or one of them, via the production of substances from one plant, including microbes (Rai et al, 2021;Harahap & Rahmat, 2015) on another plant (Rashid et al, 2010). Furthermore, the allelopathic action of several plant species was evaluated, and it was discovered that some families suppressed the root growth of lettuce by more than 80% (Ishak et al, 2021;Qasem & Foy, 2001). Metabolites produced by some traditional medicinal herbs may potentially be used as bioherbicides.…”

“…Recently, the idea is to utilize substances derived from plants to address the issues brought on by synthetic herbicides. The use of synthetic herbicides causes many issues, namely the cost of providing expensive herbicides, environmental pollution, decreasing soil organic content, and weeds that develop resistance to specific herbicides (Sarjono & Zaman, 2017;Hendarto, 2017) and human health concerns (Dayan et al, 2009;Ishak et al, 2021;Isda et al, 2013;Singh et al, 2003). In addition, when weeds are not managed, the yield of crops can decrease by 20-80% in general (Radhakrishnan et al, 2018;Syahputra et al, 2011).…”