Necrotic leaf spot of Curcuma longa (turmeric) limits the chief physio-biochemical activity for maintaining the plant health and productivity. In the present study, polyhouse and open field trials were conducted to estimate the pathogenicity of C. gloeosporioides on turmeric and to evaluate the foliar efficiency of propiconazole @ RD and copper oxychloride, extracts of A. indica, A. sativum and O. sanctum @ 40%, and culture filtrates of T. viride, T. harzianum and T. virens @ 4x106 cfu/ml in inducing physio-biochemical tolerance of pathogen inoculated and non-inoculated plants. In both the trials, these three agents yielded the highest efficiency to enhance the physio-biochemical traits. The induced physio-biochemical tolerance in treated turmeric plants showed variation in the elevation of plant health and immunity in response to pathogen aggressiveness or disease severity. However, phytophenol content was quite higher in infected plants than non-infected plants due to initiation of defense reaction in response of pathogenic elicitors. Thus, the present study demonstrated the novelty of physio-biochemical tolerance induction on turmeric plants by using fungicides, biocontrol agents and phytoextracts. HighlightsO_LIFoliar treatments improve desirable plant physio-biochemical traits against pathogen. C_LIO_LIPhysio-biochemical variation induces the innate plant defense system. C_LIO_LIHigh phytophenol accumulation counteracts the pathogenic stress. C_LIO_LITurmeric plants health and yield enhance by the reduction of disease intensity. C_LI

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Potential of fungicides, botanicals and biocontrol agents to induce physio-biochemical tolerance on Curcuma longa impaired by Colletotrichum gloeosporioides

Ashwagandha or Asgandh (Withania somnifera Dunal.) popularly known as „Indian Ginseng‟ belongs to the family Solanaceae chromosome no. 48. It is found in wild state in the Mediterranean region of North Africa. In India it is mainly cultivated in Mandsaur district of Madhya Pradesh, adjoining villages of Kota district of Rajasthan, Punjab and Karnataka. It is also found wild in forest grazing grounds in Mandasur and forest land in Bastar district of Chattisgarh, all over the foot hills of Punjab, Himachal Pradesh and western Uttar Pradesh (Nigam and Kandhalkar, 1995).

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Pankaj Chaudhary

Papers

Effect of Different Types of Organic Source of Nutrition on Growth, Yield and Quality of Ashwagandha Roots (Withania somnifera Dunal.)