Ave no controle da Tiririca em Inglês (2)

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3. Results: The partial results obtained may be consider as extremely good, considering the following aspects: 3.1 95% of the sedge plants that were in the parcels when the product was applied were completely dead after 20 days. 3.2 That affirmation was understood when, soon after the application many sedge plants that stood up from each treatment were isolated to observe a future sprouting that did not happen, although there were 124 mm of rain in the period of 12 days from the first day of the applications (01/14/1998). 3.3 The 5% of the sedge plants were not eliminate due to the following: a. The depth in which some rhizome were was from 13 to 42 cm, and they had not emerged when the products application was done. b. The density and height of the existent weeds in the area (more than seven different species were cataloged) probably prevented the products to reach some sedge plants that were below them. Apparently, there were no significant differences in relation to the number of dead sedge plants, when the Roundup was compared to the Gliphosphate. Complementary studies must be done to determine other parameters, such as: appropriate quantity of the herbicide to be applied, period of application and economic analysis. The complemental studies, programmed to the second stage of this study, were already started, and they aim mainly to determine the adequate quantity of the herbicide, in economic terms, since it was observed that in the first stage, probably due to the high quantity used (520 ml of herbicide to 20 liters of water), some cultures sowed in the area, 50 days after the application showed a small germination percentage, which varied from 50 to 75% that is considered technically non satisfactory to experimental areas. Ministério da Agricultura e do Abastecimento Empresa Brasileira de Pesquisa Agropecuária EMBRAPA Centro de Pesquisa Agropecuária do Trópico Semi-Árido BR 428, Km 152 Zona Rural, C.P 23 CEP 56300-000 Petrolina – PE Fone: (081) 862-1711 Fax: (081) 862-1744 cpatsa@cpatsa.embrapa.br 2
4. Conclusions: – O potentiator AVE, associated to a systemic herbicide, eliminates the sedge plants since a very uniform pulverization is done, in a way that all the foliar area of the plant is reached. – The use of the AVE potentiator, associated to a systemic herbicide, in the sedge control may reduce the costs of this control, since it reduces considerably the number of applications of the herbicide from four (manufacturer’s recommendations) to at the maximum two. Petrolina, 19th of May 1998. Ministério da Agricultura e do Abastecimento Empresa Brasileira de Pesquisa Agropecuária EMBRAPA Centro de Pesquisa Agropecuária do Trópico Semi-Árido BR 428, Km 152 Zona Rural, C.P 23 CEP 56300-000 Petrolina – PE Fone: (081) 862-1711 Fax: (081) 862-1744 cpatsa@cpatsa.embrapa.br 3
Page 1: PARCIAL REPORT ABOUT THE PERFORMANC
Page 5 and 6: - Second evaluation on June 3rd, 21
Page 7 and 8: TREATED SEDGE RHIZOME WITNESS SEDGE
Page 9 and 10: Ministério da Agricultura e do Aba

Ave no controle da Tiririca em Inglês (2)

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