Sclerotium rolfsii which is a causal agent of soil-borne plant disease causes disease
on a wide variety of plants. The wide host range, prolific growth, and ability to produce
persistent sclerotia contribute to the large economic losses associated with this pathogen.
Studies were conducted to determine the effect of precipitate from the root extracts of
Linostoma pauciflorum Griff. for control of S. rolfsii in-vitro. Completely Randomized Design
(CRD) was used in this experiment with four replications including four concentrations of
precipitate; 0, 10,000, 50,000 and 100,000 ppm. These treatments were compared with 1,000
ppm of fungicides (benomyl) using poisoned food technique on PDA medium at 24, 48, 72
and 96 hr. The results show that processed the precipitate at 100,000 ppm had the highest
activity (15.94, 23.00. 26.30 and 34.25%, respectively). Moreover, the number of sclerotia was
decreased significantly for approximately 3.35 times when compared with control. Thus, this
precipitate has the potential to control plant disease caused by S. rolfsii.