Abstract
Leaf blight is a major disease in citronella plantation, particularly in North-east India. Studies indicated that there was a tremendous change in the quality and quantity of oil extracted from the leaf blight-infected crops. The major oil constituents were depleted in diseased leaf as compared to the healthy one. The recovery of oil was decreased along with the quantity of citronellal, citronellol, citronellyl acetate, geranyl acetate and limonene in the diseased leaf oil. Amongst the major constituents, decrease percentage was highest in citronellol (54.21%). However, geraniol was found to increase (8.76%) in diseased leaf oil. Biosynthesis of oil was highly distrubed when citronella was infected by leaf blight. The causal organism of the leaf blight disease was identified as Curvularia sps. In-vitro experiment indicated that leaf blight disease can be controlled through application of biological agent Trichoderma viride.
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