Journal of Antivirals & Antiretrovirals
Open Access

Suppression of severe mosaic disease in Chayote (Chow-chow) Sechium edule. Sacq. Sw

8^th World Congress on Virology

November 28-30, 2016 San Antonio, USA

B Sangeetha, V G Malathi, D Alice, P Renukadevi and M Suganthy

Tamil Nadu Agricultural University, India

Posters & Accepted Abstracts: J Antivir Antiretrovir

Abstract :

Chayote (Chow-chow; Sechium edule. Sacq. Sw), Family. Cucurbitaceae) fruits are rich in carbohydrates, minerals, vitamins, particularly vitamin A and C. Chayote is cultivated in Kodaikanal, Thandikudi and Sirumalai hills of Dindigul District and Kothagiri of Nilgiris District of Tamil Nadu. The crop is affected by a severe mosaic disease which show symptoms such as characteristic yellow spots, mosaic, puckering, curling and occasional enations on the under surface of the leaf. This disease is caused by Tomato leaf curl New Delhi virus (ToLCNDV) which results in more than 90% yield loss. Since the yield loss was found to be heavy, an attempt has been made to manage the disease by using bioagents and antiviral principles (AVPs). In the management trial, uniformly in all the treatments, the seeds were treated with 0.5 % of Bacillus amyloliquefaciens (Talc based formulation) for 20 minutes followed by foliar sprays of respective components (Bioagents and AVPs) at 60 DAS and at 90 DAS. Among 10 treatments followed in various combinations, the foliar spray of root extract of Mirabilis jalapa (0.25%) recorded maximum yield of 31.25 tons per hectare followed by foliar spray of Bougainvillea spectabilis leaf extract (10%) with 30 tons per hectare and foliar spray of Vitex negundo leaf extract (10%) with 29.5 tons per hectare as against 24.25 tons per hectare in untreated control (total of seven pickings). Percent yield increase in treated plants over control was 28.8%, 23.7% and 20.6% respectively as against control. The percent disease incidence was also found to be reduced in foliar sprays of Mirabilis jalapa, Bougainvillea spectabilis and Vitex negundo as 3.3%, 6.6% and 8.8% respectively as against 83.3% in untreated control.

Biography :

Email: sangeethaagri5@gmail.com