Abstract:Red sprangletop (Leptochloa chinensis L.) is a problematic weed of aerobic rice (Oryza sativa L.) that greatly reduces in yield. The laboratory studies were undertaken to confirm allelopathicity of its plant leachates and soil-decomposition plant residues towards emergence and seedling growth of rice. In first experiment, aqueous extracts from various plant parts of red sprangletop (stem, root, leaves, flower and entire plant) at their 5% (w/v) concentration were applied to germinating rice seeds. In second ex… Show more
“…Therefore, it is worth investigating the allelopathic characteristic of L. chinensis to understand its invasiveness into upland and lowland conditions (Chin, 2001;Rao et al, 2007). Aqueous extracts of L. chinensis was reported to suppress the growth of rice seedlings (Hayyat et al, 2021). However, L. chinensis infests in not only paddy field but other crop fields Kataoka, 1981, 1982;Matsuo et al, 1987).…”
Leptochloa chinensis (L.) Nees, is known as a noxious weed species in upland and lowland crop cultivation, and has naturalized in many countries as an invasive plant species. In this study, the allelopathic characteristic of L. chinensis was evaluated to understand its invasiveness. An aqueous methanol extract of the above-grand parts of L. chinensis suppressed the growth of weed species; Echinochloa crus-galli (L.) Beauv., Vulpia myuros (L.) C. C. Gmel. and Lolium multiflorum Lam., and crop plants; cress (Lepidum sativum L.), lettuce (Lactuca sativa L.) and alfalfa (Medicago sativa L.). Significant reductions in the growth were observed as the extract concentration was increased. The effectiveness of the extract varied with the test plant species. The present research suggests that L. chinensis may have allelopathic characteristic and the characteristic of L. chinensis may contribute its invasiveness.
“…Therefore, it is worth investigating the allelopathic characteristic of L. chinensis to understand its invasiveness into upland and lowland conditions (Chin, 2001;Rao et al, 2007). Aqueous extracts of L. chinensis was reported to suppress the growth of rice seedlings (Hayyat et al, 2021). However, L. chinensis infests in not only paddy field but other crop fields Kataoka, 1981, 1982;Matsuo et al, 1987).…”
Leptochloa chinensis (L.) Nees, is known as a noxious weed species in upland and lowland crop cultivation, and has naturalized in many countries as an invasive plant species. In this study, the allelopathic characteristic of L. chinensis was evaluated to understand its invasiveness. An aqueous methanol extract of the above-grand parts of L. chinensis suppressed the growth of weed species; Echinochloa crus-galli (L.) Beauv., Vulpia myuros (L.) C. C. Gmel. and Lolium multiflorum Lam., and crop plants; cress (Lepidum sativum L.), lettuce (Lactuca sativa L.) and alfalfa (Medicago sativa L.). Significant reductions in the growth were observed as the extract concentration was increased. The effectiveness of the extract varied with the test plant species. The present research suggests that L. chinensis may have allelopathic characteristic and the characteristic of L. chinensis may contribute its invasiveness.
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