Effect of furfural on black scurf d

Effect of furfural on black scurf disease of potato plants was evaluated under laboratory and field conditions.
The inhibitory effect of different concentrations of furfural on the linear mycelial growth of Rhizoctonia solani was evaluated in vitro.
Results indicate that complete reduction in linear growth was obtained at furfural concentrations of 5000 and 6000 ppm. Meanwhile, the highest reduction was obtained at 4000 ppm which reduced the linear growth by 77.8 %.
Under field conditions, four concentrations of furfural, i.e. 4000, 5000 and 6000 ppm, in addition to fungicide Basamid (at rate 50 g/m2 of cultivation soil) were applied to study their effect on black scurf disease incidence of potato plants.
Results indicate that the highest significant reduction was obtained with furfural treatments at concentrations of 5000, 6000 ppm and fungicide Basamid which reduced the disease incidence by 86.0, 88.9 and 87.5 %, respectively.
Meanwhile, furfural at 4000 ppm showed moderate effect.
As for tuber yield the highest increase was obtained with furfural at concentrations of 5000, 6000 ppm and fungicide Basamid which increased the potato yield by 50.0, 55.0 and 50.0 % respectively.