CHEMICAL MANAGEMENT OF THE GRAMINEOUS Cynodon dactylon (L.) Pers AND Rottboellia cochinchinensis (Lour) Clayton IN CORN AND ITS EFFECT IN THE OUTPUT UNDER SYSTEM WITHOUT TILLAGE.
The chemical combat of weeds in corn, is a common activity in the mayority of the corn farming areas. However, in many fields persistent and aggresive gramineous predominate such as the hen grass (Cynodon dactylon (L.) Pers) and manisuris (Rottboellia cochinchinensis (Lour) Clayton). In two corn localities of Alanje and Bugaba, province of Chiriqui, Republic of Panama, with the purpose of evaluating the effectivity of the products and/or their mixture over such weeds. The random block design permitted to evaluate nine treatments of which seven were chemical treatments, one manual root out and one witness. The seven chemical treatments had an application of glyfosate intake 1.44 kg i.a./ha, 15 days before planting (DAS) and after applications in pre, post-early and post-late of the herbicides and/or their mixtures. The results point out that in the locality of Guarumal, Alanje, the treatment glyfosate/paraquat in dose of 1.44/0.4 kg i.a./ha applied 15 days before planting and 25 days after planting (DDS) showed the best control over hen grass at 45 and 90 days, with 63.3 and 50.0%, respectively. In the locality of Los Angeles, Siogui, Bugaba, the treatment glyfosate/paraquat in dose of 1.44/0.44 kg i.a./ha applied 15 days before planting and 25 days after planting showed an excellent control (50.0%) over manisuris even 90 days after planting. The marginal return analysis of the treatment glyfosate/paraquat in dose of 1.44/0.4 kg i.a./ha, applied 15 DAS and 25 DDS, in the localities of Guarumal and Los Angeles, Siogui, show a profitability of around B/.48.33 and B/.21.76 after recoved the invested money. The hen grass reduced the production of corn about 84.3% and the manisuris about 74.5%.
| Main Authors: | , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Instituto de Innovación Agropecuaria de Panamá
1995
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| Online Access: | http://www.revistacienciaagropecuaria.ac.pa/index.php/ciencia-agropecuaria/article/view/467 |
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| Summary: | The chemical combat of weeds in corn, is a common activity in the mayority of the corn farming areas. However, in many fields persistent and aggresive gramineous predominate such as the hen grass (Cynodon dactylon (L.) Pers) and manisuris (Rottboellia cochinchinensis (Lour) Clayton). In two corn localities of Alanje and Bugaba, province of Chiriqui, Republic of Panama, with the purpose of evaluating the effectivity of the products and/or their mixture over such weeds. The random block design permitted to evaluate nine treatments of which seven were chemical treatments, one manual root out and one witness. The seven chemical treatments had an application of glyfosate intake 1.44 kg i.a./ha, 15 days before planting (DAS) and after applications in pre, post-early and post-late of the herbicides and/or their mixtures. The results point out that in the locality of Guarumal, Alanje, the treatment glyfosate/paraquat in dose of 1.44/0.4 kg i.a./ha applied 15 days before planting and 25 days after planting (DDS) showed the best control over hen grass at 45 and 90 days, with 63.3 and 50.0%, respectively. In the locality of Los Angeles, Siogui, Bugaba, the treatment glyfosate/paraquat in dose of 1.44/0.44 kg i.a./ha applied 15 days before planting and 25 days after planting showed an excellent control (50.0%) over manisuris even 90 days after planting. The marginal return analysis of the treatment glyfosate/paraquat in dose of 1.44/0.4 kg i.a./ha, applied 15 DAS and 25 DDS, in the localities of Guarumal and Los Angeles, Siogui, show a profitability of around B/.48.33 and B/.21.76 after recoved the invested money. The hen grass reduced the production of corn about 84.3% and the manisuris about 74.5%. |
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