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International Journal of Applied Agricultural & Horticultural Sciences
  • 29 April, 2024
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Language : English
DOI Prefix : 10.37322
P-ISSN : 0974-0775
E-ISSN : 2582-4198
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Vol. 7 (6) : November-December 2016 issue
Green Farming Vol. 7 (6) : 1456-1459 ; November-December, 2016
Management of tomato leaf curl disease under field condition in Tripura
HEMAVATI RANEBENNURa1*, SUBRATA BISWASb2, S.V. NGACHANc3 and PINKI PALa4
aICAR Research Complex for NEH Region, Tripura Centre, Lembucherra - 799 210 (West Tripura)
bICAR- Central Research Institute for Jute and Allied Fibres, Barrackpore - 700 120 (West Bengal)
cICAR Research Complex for NEH Region, Umian - 793 103 (Meghalaya)
Designation :  
1Scientist *(hemaiari@gmail.com), 2Principal Scientist, 3Director, 4SRF
Subject : Vegetable Sciences
Paper No. : P-5005
Total Pages : 4
Received : 29 March 2016
Revised accepted : 21 October 2016
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Citation :

HEMAVATI RANEBENNUR, SUBRATA BISWAS, S.V. NGACHAN and PINKI PAL. 2016. Management of tomato leaf curl disease under field condition in Tripura. Green Farming Vol. 7 (6) : 1456-1459 ; November-December, 2016

ABSTRACT
The leaf curl disease caused by Tomato Leaf Curl Virus affected all 15 tested varieties of tomato during the years 2014-2015 in Tripura. The disease was most severe in BT-1 variety with mean disease 80.9%, while, that was significantly less in the varieties, like, Tura Local, Type-1 and H-24 as well as a hybrid, All-Rounder (Syngenta), with TLCV incidences, 37.5%, 43.3%, 48% and 47.9%, respectively. The disease incidence in 2015 was more than 2014. Similarly, the number of fruits and fruit weight of all tested varieties were less in 2015. The leaf curl disease was not minimized by application of biopesticide namely neem oil, neem leaf extract or neem twig extract. Furthermore, none of the pesticides, like, benfuracarb, carbosulfan, cypermethrin, dimethoate, imidacloprid, malathion and monochrotophos, were much effective to reduce the disease incidence at field conditions in Tripura. However, in case of integrated management practice with the use of seed bed covering by cotton net (mesh ? 0.5mm), applying biopesticide, like, neem (Azadirachta indica) oil (0.3%) at 10 days interval before the appearance of disease in field and spraying chemical pesticide, monocrotophos (0.1%), at 15 days interval soon after appearing of the disease in field was found effective to reduce both incidence and intensity of leaf curl disease and that effect was more promising while host resistance was used in the management practice.
Key words :
Bio-pesticide, Chemical pesticide, Host resistance, Integrated disease management, Leaf curl disease, TLCV, Tomato, Whitefly vector.