Incidental finding of root knot symptoms in Lavandula angustifolia Mill: First report from India
Some plants of Lavandula angustifolia Mill. appeared to be weaker than the rest which lead to the exploration of prominent knot and gall like structures in their respective root system that are in turn characteristics for root knot nematode infection. Based upon the prominence of infection present in the roots, these infected plants were categorised into three groups having mild infection, high infection and severe infection. A total of thirty two traits were considered for analysis out of which seventeen traits were morphometric and fifteen traits were chemometric in nature. A reduced percentage concentration in a number of essential oil components were observed in the severely infected plants. This is an alarming finding because the quality of essential oil of lavender is invariably dependent on the presence of adequate component concentration of its essential oil which in the present study was reduced due to root knot nematode infection.