Ave no controle da Tiririca em Inglês (2)

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FINAL TECHNICAL REPORT ABOUT THE PERFORMANCE OF THE AVE POTENTIATOR AT THE SEMI-ARID, IN THE SEDGE (Cyperus rotundus L.) CONTROL 1. Objective Test the efficiency of the AVE potentiator, associated to two herbicides, in the sedge control at the Semi-Arid region. 2. Material and Methods: The second stage of this work was done at the Experimental Field of Bebedouro as well, which belongs to EMBRAPA Semi-Arid, at the municipal district of Petrolina, PE, at a Clay soil, without any cultivation, and that presented a sedge infestation percentage around 95% (visual evaluation), in which the population had in average 227 plants/m². In this area 12 different species of weeds were cataloged). The experiment outlining was of random blocks, with five treatments of 400 m² and three repetitions of 2.000 m² each, being used as control element, the Roundup herbicide. The quantities of the herbicide applied in each treatment were of: 50; 75; 100; 125 and 150 ml, associated to 60ml of the AVE Potentiator. The evaluations were done by sinecological methods (plants counting), in areas of 1 m², in all treatments and repetitions. The experiment had duration of 150 days (May/September 98), in the period were done four evaluations and two applications through foliar pulverization. The applications were done with costal pulverizer, with the pressure and medium outflow of 2,22 kg/cm 2 e 2,21 l/minute, respectively The evaluations and the pulverizations were done at the following order: – First evaluation on May 12th, before the first application; – First application on May 13th, being the sedge with medium number and height per leaf varying from 8 to 12 and from 16 to 25 cm, respectively; 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 4
– Second evaluation on June 3rd, 21 days after the first application, being determined by treatment and in all repetitions, the percentage of dead plants and survivors; – Third evaluation on July 29 th , 77 days after the first application, with the same objectives of the second, and including the emerged plants as well (new plants); – Second application on July 30 th ; – Fourth evaluation on September 2nd, 34 days after the second application, with similar objectives from the third. 3. Results and Discussion: 1 – The percentage of dead sedge plants, 21 days after the first application, vary from 31% (50ml) to 89% (150ml) respectively. 2 – The medium percentage of survivor plants at the same period vary from 69% (50 ml) to 11% (150 ml), being the main cause of the plants surviving, the non direct contact with the applied products, since they were below other bigger weeds. 3 – The medium percentage of dead sedge plants, after 34 days from the second application, vary from 93% (50 ml) to 99% (150 ml). 4 – The medium percentage of the survivor plants in the same period, has also vary from 7% (50 ml) to 0,98% (150 ml), so that in this second application, the treatment 4 (125 ml Roundup + 60 ml AVE) have presented 100 % of dead plants. 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 5
Page 1 and 2: PARCIAL REPORT ABOUT THE PERFORMANC
Page 3: 4. Conclusions: - O potentiator AVE
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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