Crowfootgrass (Dactyloctenium aegyptium) germination and response to herbicides in the Philippines
Crowfootgrass, a C4species, is one of the principal weeds of dry-seeded rice in Asia. Weed management decisions for this species can be derived from knowledge of its seed germination biology. Experiments were conducted in the laboratory and screenhouse to determine the effects of light, alternating...
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
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Cambridge University Press
2011
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| Acceso en línea: | https://hdl.handle.net/10568/165130 |
| _version_ | 1855525550241611776 |
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| author | Chauhan, Bhagirath Singh |
| author_browse | Chauhan, Bhagirath Singh |
| author_facet | Chauhan, Bhagirath Singh |
| author_sort | Chauhan, Bhagirath Singh |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Crowfootgrass, a C4species, is one of the principal weeds of dry-seeded rice in Asia. Weed management decisions for this species can be derived from knowledge of its seed germination biology. Experiments were conducted in the laboratory and screenhouse to determine the effects of light, alternating day/night temperatures, water stress, seed burial depth, and rice residue on seed germination and seedling emergence of crowfootgrass and to evaluate the response of this weed to commonly available selective POST herbicides in the Philippines. Light stimulated seed germination, but it was not an absolute requirement for germination. Germination in the light/dark regime was greater at alternating day/night temperatures of 25/15 C (92%) than at 30/20 (70%) or 35/25 C (44%). The osmotic potential required for 50% inhibition of maximum germination was −0.23 MPa, although some seeds germinated at −0.6 MPa. Seedling emergence was greatest for the seeds placed on the soil surface (64%), and emergence declined with increased burial depth in soil. No seedlings emerged from a burial depth of 6 cm or greater. Seedling emergence of crowfootgrass was reduced by the addition of rice residue to the soil surface at rates equivalent to 4 to 6 Mg ha−1. Fenoxaprop-p-ethyl + ethoxysulfuron at 45 g ai ha−1provided excellent control of crowfootgrass when applied at the four- (99%) and six-leaf (86%) stage. The information gained from this study could contribute to developing components of integrated weed management strategies for crowfootgrass. Soil inversion by tillage to bury weed seeds below their maximum depth of emergence, use of crop residue as mulch, and early application of an effective POST herbicide could serve as important tools for managing crowfootgrass. |
| format | Journal Article |
| id | CGSpace165130 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2011 |
| publishDateRange | 2011 |
| publishDateSort | 2011 |
| publisher | Cambridge University Press |
| publisherStr | Cambridge University Press |
| record_format | dspace |
| spelling | CGSpace1651302025-02-19T14:25:24Z Crowfootgrass (Dactyloctenium aegyptium) germination and response to herbicides in the Philippines Chauhan, Bhagirath Singh crop residues drought stress emergence germination herbicides inhibition mulches osmosis pesticides seed germination seedlings seeds stress temperature tillage weed control weeds Crowfootgrass, a C4species, is one of the principal weeds of dry-seeded rice in Asia. Weed management decisions for this species can be derived from knowledge of its seed germination biology. Experiments were conducted in the laboratory and screenhouse to determine the effects of light, alternating day/night temperatures, water stress, seed burial depth, and rice residue on seed germination and seedling emergence of crowfootgrass and to evaluate the response of this weed to commonly available selective POST herbicides in the Philippines. Light stimulated seed germination, but it was not an absolute requirement for germination. Germination in the light/dark regime was greater at alternating day/night temperatures of 25/15 C (92%) than at 30/20 (70%) or 35/25 C (44%). The osmotic potential required for 50% inhibition of maximum germination was −0.23 MPa, although some seeds germinated at −0.6 MPa. Seedling emergence was greatest for the seeds placed on the soil surface (64%), and emergence declined with increased burial depth in soil. No seedlings emerged from a burial depth of 6 cm or greater. Seedling emergence of crowfootgrass was reduced by the addition of rice residue to the soil surface at rates equivalent to 4 to 6 Mg ha−1. Fenoxaprop-p-ethyl + ethoxysulfuron at 45 g ai ha−1provided excellent control of crowfootgrass when applied at the four- (99%) and six-leaf (86%) stage. The information gained from this study could contribute to developing components of integrated weed management strategies for crowfootgrass. Soil inversion by tillage to bury weed seeds below their maximum depth of emergence, use of crop residue as mulch, and early application of an effective POST herbicide could serve as important tools for managing crowfootgrass. 2011-12 2024-12-19T12:54:44Z 2024-12-19T12:54:44Z Journal Article https://hdl.handle.net/10568/165130 en Cambridge University Press Chauhan, Bhagirath Singh. 2011. Crowfootgrass (Dactyloctenium aegyptium) germination and response to herbicides in the Philippines. Weed sci., Volume 59 no. 4 p. 512-516 |
| spellingShingle | crop residues drought stress emergence germination herbicides inhibition mulches osmosis pesticides seed germination seedlings seeds stress temperature tillage weed control weeds Chauhan, Bhagirath Singh Crowfootgrass (Dactyloctenium aegyptium) germination and response to herbicides in the Philippines |
| title | Crowfootgrass (Dactyloctenium aegyptium) germination and response to herbicides in the Philippines |
| title_full | Crowfootgrass (Dactyloctenium aegyptium) germination and response to herbicides in the Philippines |
| title_fullStr | Crowfootgrass (Dactyloctenium aegyptium) germination and response to herbicides in the Philippines |
| title_full_unstemmed | Crowfootgrass (Dactyloctenium aegyptium) germination and response to herbicides in the Philippines |
| title_short | Crowfootgrass (Dactyloctenium aegyptium) germination and response to herbicides in the Philippines |
| title_sort | crowfootgrass dactyloctenium aegyptium germination and response to herbicides in the philippines |
| topic | crop residues drought stress emergence germination herbicides inhibition mulches osmosis pesticides seed germination seedlings seeds stress temperature tillage weed control weeds |
| url | https://hdl.handle.net/10568/165130 |
| work_keys_str_mv | AT chauhanbhagirathsingh crowfootgrassdactylocteniumaegyptiumgerminationandresponsetoherbicidesinthephilippines |