The objectives of this research were to verify if high Mo rates sprayed on foliage are toxic to common bean and to determine seed Mo content in response to these rates. One experiment was carried out in Coimbra, MG, in soil with pH of 5.2, where it was tested the rates of 0, 90, 1000, 2000, 3000, and 4000g ha-1 of Mo. The rate of 90 was applied at V4 phase of common bean. The rate of 1000 was applied in three ways: all at V4 phase; 1/2 at V4 and 1/2 at R5; and ¼ at V4, ¼ at R5, ¼ at R6, ¼ at R7. The rates of 2000, 3000, and 4000 were divided in four equal portions and sprayed at V4, R5, R6, and R7 phases. Mo rates had no effect on seed yield, seed mass and seed germination, indicating that Mo rates as high as 4000g ha-1 is not toxic to common bean. Mo content in seed increased from 0.007 to 6.961µg with increasing doses of Mo rates.
Phaseolus vulgaris; Mo concentration; seed germination
