Evaluation of Eucalyptus spp. extracts on Alternaria leaf blight of Lycopersicon esculentum Mill

Laboratory and field studies were conducted to evaluate the effect of different leaves extracts of Eucalyptus spp. on causal organism of leaf blight on tomato (Alternaria solani). Among the extracts tested, E. citriodora was highly effective in inhibiting the growth of A. solani as it produced 67.60, 74.95 and 85.98% growth inhibition at 2, 5 and 10% concentrations, respectively. Eucalyptus globulus and E. alba extracts were found effective as growth inhibitions were between 38 to 65 and 39 to 48%. Eucalyptus leptopoda extract was not at all inhibitory even at 10% concentration. Similarly, E. grossa extract was also not very promising as they produced only 38.20% inhibition at 10% concentration. The disease intensity was satisfactorily managed by spraying of E. citriodora extract by 1.90 @ 5% concentration in field condition as compared to the unsparing plot.

کلیدواژه ها:

Alternaria solani ، Eucalyptus spp. ، Tomato ، Plant extract