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First observation of little leaf disease and its impact on the yield and composition of the essential oil of rose‐scented geranium ( Pelargonium sp.)
Author(s) -
Rajeswara Rao B R,
Kaul P N,
Mallavarapu Gopal R,
Ramesh S
Publication year - 2000
Publication title -
flavour and fragrance journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 70
eISSN - 1099-1026
pISSN - 0882-5734
DOI - 10.1002/1099-1026(200005/06)15:3<137::aid-ffj880>3.0.co;2-a
Subject(s) - geranium , geraniol , geraniaceae , citronellol , pelargonium , petiole (insect anatomy) , botany , horticulture , essential oil , biology , shoot , ornamental plant , leaf size , chemistry , hymenoptera , cultivar
Rose‐scented geranium ( Pelargonium sp.) plants infected with little leaf disease, probably caused by mycoplasma, were firstly observed during 1996–1998. The plants exhibited symptoms of reduced leaf/petiole size (little leaf), yellowing and bunching of leaves and cessation of plant growth, resulting in plant mortality. Plant parameters, viz. plant height, plant spread, number of branches, leaf size, leaf weight, etc., were adversely affected by little leaf disease, leading to significant reductions in shoot (49–70%), root (65–84%) and oil (67–91%) yields of diseased plants in comparison to healthy plants. Healthy plants recorded higher concentrations of geraniol, while little leaf disease‐affected plants had higher percentages of isomenthone, citronellol, citronellyl formate, 10‐ epi ‐γ‐eudesmol, citronellyl tiglate and geranyl tiglate. Copyright © 2000 John Wiley & Sons, Ltd.