SUSTAINABLE PRACTICES IN RELATION TO GROWTH, ANTICHILCV AND ANTI-WHITEFLY ACTIVITIES IN RESPONSE TO DEFENCE INDUCING BIO-MOLECULES IN CHILLI
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Date
2023-02-15
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University of Agricultural Sciences, Bangalore
Abstract
Chilli is an important vegetable cum spice crop, known as wonder spice. Chilli leaf curl virus (ChiLCV) is a major threat for the production and productivity and it is transmitted by whitefly. In order to manage the whiteflies farmers indiscriminately use of
huge amount of pesticide, resulting in resurgence of the pests, phytotoxicity, human health hazards, destruction of beneficial microorganisms and environmental pollution. Induction of biochemical defence and eco-friendly management through bio-molecules is a new trend. Among different tested sea weed molecules and plant extract in both laboratory and glass house condition, Neem soap (8gm/L) was found effective. In lab condition maximum mean mortality of whiteflies was recorded in agar plate method (60 %) in cotton leaves. While, least preference (10 whiteflies) and fecundity (35 eggs) was observed in glass house
condition which was tested in cotton plants. The LBD12 (1.0ml/L) and LBD-14 (1.0ml/L) bio-molecule treated chilli plants showed least disease severity in both pre-inoculation (38.89 % and 42.22 %) and post-inoculation (22.22 % and 23.44 %) which were
significantly enhanced defence related enzymes such as POX, Catalase, PPO, SOD, PAL and phenol in both pre-inoculation and post-inoculated condition. Eight integrated modules had been developed and evaluated for management of ChiLCV and whitefly activity in three different farmer’s field. Among them module-1 and module-2 exhibited least whitefly activity and recorded least disease incidence and severity compared to other modules. Maximum yield was observed in both the modules (26.87 t/ha and 24.04 t/ha) with the B:C ratio of (6.72:1 and 6.01:1) as compared to other module.