TY  - BOOK
AU  - Kangjam, Binalata
AU  - T.Rajesh
TI  - Management of turmeric leaf spot,colletotrichum capsici (Syd.) butler and bisby under in-vitro condition
U1  - 633.383 
PY  - 2012///
CY  - Umiam
PB  - CPGS, CAU
KW  - Turmeric leaf spot
KW  - Management
KW  - Butler and Bisby
KW  - Under in-vitro condition
N2  - Leaf spot incited by Colletotrichum capsici is one of the most serious foliar diseases of turmeric and becoming a major limiting factor for production and quality of the turmeric in India. The disease has also been found to occur frequently in the turmeric fields of Meghalaya. The experiments were conducted in order to have basic information on disease incidence and yield loss in turmeric varieties (Lakadong, Waiphei, Megha turmeric-1 and Meghalaya local) and in-vitro evaluation of various botanicals, biocontrol agents (BCAs) and fungicides. The field study revealed that Megha turmeric-1 showed the least per cent disease index (POI) (49.19%) with minimum yield loss (21.78%) while Waiphei had the highest POI (75.93%) with maximum yield loss (55.16%). The second least yield loss (26.93%) was observed in Meghalaya local with POI of 51.11 %. Growth pattern and sporulation of the pathogen were also evaluated by using five different culture media under laboratory condition. The highest mycelial growth (82.56 mm) in Oat meal agar medium and the least (4:3.03 mm) in Rose Bengal agar medium were observed. No sporulation was found in Richard's agar medium, whereas maximum sporulation was found in all the other media. Under in-vitro condition, eight plant extracts, five BCAs and seven fungicides were evaluated to find out their efficacy against the pathogen. Out of eight plant extracts used, clove extract of garlic showed the maximum inhibition on mycelial growth of fungus (100%) followed by pigeon berry (98.44%) and ghaneri extracts (94.00%). Dual culture assays carried out with the BCAs showed that Trichoderma harzianum (74.89%) had highest percent inhibition of the fungal growth whereas Pseudomonas putida had least inhibition (56.22%). Among chemicals, complete inhibition of mycelial growth (100%) was observed in Sixer (Carbendazim + Mancozeb), Tilt (Propiconazole) and Avone (Hexaconazole) at all three concentrations (0.1%, 0.2% and 0.3%) whereas least inhibition (64%) was observed in Mancozeb at 0.2%. The best performed genotypes, plant extracts, BCAs and fungicides could be utilized as components of integrated disease management after making thorough field evaluation in future
ER  -