Role of Virus Infection in Seed Tubers, Secondary Spread and Insecticidal Spray on the Yield of Potato in Deccan Plateau
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Role of Virus Infection in Seed Tubers, Secondary Spread and Insecticidal Spray on the Yield of Potato in Deccan Plateau, India Kavita Hegde 1
& C.
M. Kalleshwaraswamy 1 & V. Venkataravanappa 2
Received: 7 September 2019 / Accepted: 24 September 2020/ # European Association for Potato Research 2020
Abstract Potato (Solanum tuberosum L.) is an important food and cash crop of India. An important constraint in potato cultivation in Deccan Plateau of India is nonavailability of quality seed tubers. Many certified cultivars are readily available, but their quality check pertaining to viral infection is neglected. This study was made to determine the infection level of potato viruses in certified seed potatoes of Kufri Jyoti, a popular cultivar of the Deccan Plateau region. The seed tubers were originally collected from selected stores of Hassan and Chikkamagaluru markets, from where the growers procure seeds for cultivation, and tested for PVY and PLRV viruses through DACELISA. The highest prevalence was of PVY (59.1% to 66.9%), whereas 15.2% to 19.8% of PLRV infection was found. As these infected tubers serve as a major source for field incidence of viruses, further studies were made in the field. The influence of PVY infection level in seed tubers on the secondary spread, growth and yield parameters was determined. Virus incidence was lowest (27.1%) in potato plants grown from tubers with 0% PVY infection but increased steadily with 10, 30 and 50%, and the highest incidence (100%) was with 100% infected tubers. The incidence and spread of virus in the field could be explained by both prior infections of seed tubers with PVY and field transmission through aphids. The slowest plant growth and lowest tuber yield were recorded with tubers having 100% infection of PVY. This study strongly emphasized the need to refocus on improving the health status of seed tubers, on farm management of aphids, and spread of virus. Keywords Aphids . Farm management . PLRV . Potato cultivar-Kufri Jyoti . PVY
* Kavita Hegde [email protected]
1
Department of Agricultural Entomology, University of Agricultural and Horticultural Sciences, Shivamogga, Karnataka, India
2
Central Horticultural Experiment Station, Indian Council of Agricultural Research-Indian Institute of Horticultural Research, Chettalli, Kodagu, Karnataka, India
Potato Research
Introduction The Deccan Plateau region of India covers central and peninsular India and is situated between 600 to 1000 masl and covers about 8–9% of potato area and 6–7% of potato production in the country. This region is popular for its processing quality potatoes and comprises states like Gujarat, Madhya Pradesh, Maharashtra, Karnataka, Andhra Pradesh, Telangana and Orissa. In this area, potatoes are grown in two crop seasons, viz. Kharif and Rabi. Deccan Plateau growers are dependent on distant Northern plains for quality seed tubers due to lack of trust in using their on-farm grown potato for seed purpose (Rana et al. 2015). The major problems in those designated seed production are
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