Citation
Dilipkumar Masilamany, . and Chuah Tse Seng, . Allelopathic effects of sunflower leaf extract and selected pre-emergence herbicides on barnyardgrass. pp. 309-318. ISSN 1394-9829
Abstract
Barnyardgrass has been the most frequently reported troublesome weed in rice fields because it is an aggressive invader that is difficult to control and reduces rice yields significantly. A laboratory study was conducted to determine the effects of sunflower leaf extract and pre-emergence herbicides pretilachlor and thiobencarb on shoot emergence and seedling growth of barnyardgrass. The sunflower leaf extract and the pre-emergence herbicides exhibited phytotoxic effects on barnyardgrass at different degrees of potency. It was found that sunflower leaf extract and thiobencarb are root inhibitors and strong shoot inhibitors respectively. Whereas pretilachlor is a strong root and shoot inhibitor. The emergence and seedling growth of barnyardgrass were inhibited by 80 “ 100 with increasing concentration of sunflower leaf extract from 10 “ 15 (w/v). Comparatively rice seedlings were more tolerant to sunflower leaf extract where rice emergence and growth were inhibited by 10 “ 65 at the same concentrations. The present findings suggest the possibility of using sunflower leaf extract as a pre-emergence bio-herbicide for inhibiting seedling growth of barnyardgrass without injuring the rice seedlings.
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Abstract
Barnyardgrass has been the most frequently reported troublesome weed in rice fields because it is an aggressive invader that is difficult to control and reduces rice yields significantly. A laboratory study was conducted to determine the effects of sunflower leaf extract and pre-emergence herbicides pretilachlor and thiobencarb on shoot emergence and seedling growth of barnyardgrass. The sunflower leaf extract and the pre-emergence herbicides exhibited phytotoxic effects on barnyardgrass at different degrees of potency. It was found that sunflower leaf extract and thiobencarb are root inhibitors and strong shoot inhibitors respectively. Whereas pretilachlor is a strong root and shoot inhibitor. The emergence and seedling growth of barnyardgrass were inhibited by 80 “ 100 with increasing concentration of sunflower leaf extract from 10 “ 15 (w/v). Comparatively rice seedlings were more tolerant to sunflower leaf extract where rice emergence and growth were inhibited by 10 “ 65 at the same concentrations. The present findings suggest the possibility of using sunflower leaf extract as a pre-emergence bio-herbicide for inhibiting seedling growth of barnyardgrass without injuring the rice seedlings.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Herbicides |
| AGROVOC Term: | Sunflowers |
| AGROVOC Term: | Allelopathy |
| AGROVOC Term: | Preemergence application |
| AGROVOC Term: | Echinochloa crus galli |
| AGROVOC Term: | Rice |
| AGROVOC Term: | Phytotoxicity |
| AGROVOC Term: | Weeds |
| AGROVOC Term: | Rice fields |
| AGROVOC Term: | Yields |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 06:29 |
| URI: | http://webagris.upm.edu.my/id/eprint/24478 |
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