Vol. 12, Issue 2 (2023)

Author(s):
Veera Suresh, D Anitha Kumari, R Preetham Goud, AVN Lavanya, V Krishnaveni and T Mamatha

Abstract:
Anthracnose caused by Colletotrichum gloeosporioides is a major threat to greater yam cultivation in India. The yield loss due to this disease is around 50 to 90%. The present study was undertaken to evaluate different treatments for the management of Anthracnose disease. A field experiment was conducted during 2017-18 and 2018-19 under All India Co-ordinated Research Project on Tuber Crops at Vegetable Research Station, Sri Konda Laxman Telangana State Horticultural University, Rajendranagar, Hyderabad, Telangana, India. The trail was laid out with four treatments and five replications in ramdomised block design with Sree Karthika variety of greater yam. The treatments included: T1: Soil application of Trichoderma asperellum + Tuber treatment with Trichoderma asperellum + foliar spray of carbendazim @ 0.05% (1g carbendazim/ litre) thrice at 15 days interval after initiation of the symptom, T2: Soil application of Trichoderma asperellum + Tuber treatment with Trichoderma asperellum + foliar spray of carbendazim @ 0.05% (1g Bavistin/ litre) thrice at 15 days interval after initiation of the symptom and further four sprays at monthly interval, T3: foliar spray of carbendazim @ 0.05% (1g carbendazim / litre) thrice at 15 days interval after initiation of the symptom and further 4 sprays at monthly interval and T4: Control. Among the treatments tested minimum disease intensity (6.36 percent) and maximum yield (15.27 t/ha) was recorded in T₂ treatment followed by T₁ treatment (10.5 percent and 15.17 t/ha), T3 (16.0 percent and 12.55 t/ha) and highest disease incidence (35.55 percent) and lowest yield (8.15 t/ha) was recorded in T₄ ­control treatment. The study indicated that anthracnose disease of greater yam could be effectively managed by soil application with Trichoderma asperellum + Tuber treatment with Trichoderma asperellum + foliar spray of carbendazim @ 0.05% (1g carbendazim / litre) three times at 15 days interval after initiation of the symptom and further four sprays at monthly interval in Telangana region.