Revista Brasileira De Herbicidas 2001; 2(1-2): 37-42
Productivity and physiological quality of soybean seed originated from plants desiccated by carfentrazone-ethyl
The purpose of the experiment was to evaluate the application of carfentrazone herbicide as desiccant on a soybean crop and its effect on soybean seed yield and physiological quality. A randomized complete block design with 10 treatments and 4 replications was set up. The experimental plot consisted of 8 rows, each 5 m long. The following treatments were applied to plants of the FT-Jatobá cultivar: I) control, without desiccant; 2) carfentrazone (50 g/ha); 3) carfentrazone (70 g/ ha); 4) carfentrazone + MSMA (50 + 480 g/ha); 5) carfentrazone + MSMA (60 + 408 g/ha); 6) carfentrazone + MSMA (70 + 336 g/ha); 7) MSMA (1200 g/ha); 8) amonium gluphosynato (500 g/ha); 9) paraquat (400 g/ha) and 10) diuron / paraquat (250 / 500 g/ha). The desiccants were applied with a carbon dioxide-pressurized backpack sprayer, between R6 and R7 soybean development stages, the seeds having between 32 and 40% humidity. The following characteristics were analyzed: w~ter conten~, standard germination, first count of standard germination, accelerated aging, water content after accelerated ~gl~g.’ electr~c condutivity and seed yield. It was concluded that carfentrazone applied as a desiccant on soybean crops, individually m dos~ges of 50 and 70 glha or with MSMA at dosages of 50 + 480, 60 + 408 and 70 + 336 glha, did not affect the soybean seed yield and their physiological quality. More studies on carfentrazone-ethyl as a desiccant of soybean is necessary.
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