In Vitro Studies on the Growth Inhibiting Potential of Some Botanical Extracts Against Macrophomina phaseolina

Abstract

Natural plant extracts are valuable source of numerous fungitoxic compounds that can substitute synthetic fungicides. In current studies, six plant extracts viz., Zingiber officinalis, Eucalyptus camaldulensis, Azadirachta indica, Allium cepa, Cassia fistula and Allium sativum in three dose levels standard dose (S.D), S/2 and S/3 were tested against colony growth of Macrophomina phaseolina under in vitro conditions. Among all the treatments ginger extract at its standard dose was found highly effective followed by eucalyptus and neem. Percentage colony growth inhibition of (50 %), (38 %) and (29 %) was recorded to produce by ginger, eucalyptus and ginger respectively as compared to control treatment where no growth inhibition was recorded. Extract of Allium sativum was found least effective phytochemical where pathogenic fungal growth inhibition was (24.5 %). Concentration comparison of three dose levels showed that (S.D) was highly effective where mean colony growth of M. phaseolina was (3.72 cm) followed by (4 cm) @ S/2 and maximum diameter was (4.36 cm) @ S/3 concentration.