Control of pearl millet downy mildew by seed treatment with metalaxyl uri icon

abstract

  • 3 formulations of metalaxyl were tested in various seed treatments for the control of pearl millet downy mildew (Sclerospora graminicola) in 3 field experiments with downy mildew-susceptible pearl millet hybrid NHB-3. Significant reductions in downy mildew were obtained with all fungicide treatments. Best control was obtained when seed was soaked in 0.5% aq. sol. of a liquid formulation (mean infection index of 9.8% compared with 94.8% in the untreated control). The degree of control with the wettable powder formulations was directly related to fungicide dosage and there were no significant effects of application method. Simple dusting of seed at 2 g a.i./kg gave a high level of control (infection index of 12.6% compared with 78.9% in the untreated control). In 2 experiments, grain yields from all the treated plots were significantly greater than from the untreated plots (means of 1.23 and 1.53 t/ha for treated plots compared with 485 and 743 kg, resp. ), and in the 3rd, the treatment with the least downy mildew gave significantly more grain than the untreated control (1.23 t compared with 727 kg/ha)

publication date

  • 1981
  • 1981