Allelopathy effects of red spragle (Leptochloa chinensis (L.) Nees.) on some crops and weeds | แอลลีโลพาธีของหญ้าดอกขาวต่อพืชปลูกและวัชพืชบางชนิด
2009
Sanit Sawatdikarn(Phranakhon Si Ayutthaya Rajabhat University, Phranakhon Si Ayutthaya (Thailand). Faculty of Science and Technology) E-mail:[email protected]
Stems of red spragle (Leptochloa chinensis (L.) Nees.) were extracted by ethyl acetate and used at 0, 25, 50 and 75 mg/ml. The red spragle extracts were tested on inhibitory of seed germination and growth in two groups of seeds. The first group was: cucumber (Cucumis sativus L.), watermelon (Citrullus lanatus (Thunb) Matsum and Nakai and pumpkin (Cucurbita pepo L.). and weeds: alyceclover (Alysicarpus vaginalis (L.) DC, wild spider (Cleome viscose L.) and pigweed (Portulaca oleracea L.). Results showed that crude extracts at 75 mg/ml showed the highest inhibitory of seed germination of cucumber, watermelon and pumpkin with 71.61, 32.83 and 76.43 percent, respectively. For inhibitory of seed germination of weeds : alyceclover, wild spider and pigweed, a concentration of crude extracts at 75 mg/ml had the highest with 42.85, 70.12 and 85.69 percent, respectively. For inhibited shoot length, root length and seedling dry weight, the resulted showed that seedling growth gave the highest inhibition at 75 mg/ml in two groups of seeds. A high concentration resulted in the increasing on inhibitory of seed germination and growth in two groups of seeds.
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