EVALUATION OF ORGANICS AND INDIGENOUS PRODUCTS FOR THE MANAGEMENT OF Helicouerpa armigera (Bubner) IN CHILLI
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Date
2004
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BANGALORE
Abstract
"A field trail was carried out using chilli var. Byadagi Dyavanoor during kharif
season of 2002-03 at Main Agricultural Research Station, University of Agricultural
Sciences, Dharwad to evaluate the organic amendments and indigenous products for the
management of H. armigera.
Studies on the effect of organic amendments on H. armigera revealed that among
the different organic amendments, soil application of neem cake @ 1 t/ha was very
effective in recording lowest eggs (0.69), larval population (0.62) and lowest fruit damage
(6.5%) being on par with vermicompost @ 2 t/ha. Next best treatments were neem cake
@ 0.5 t/ha + 50 per cent RDF, vermicompost @ 1 t/ha + 50 per cent RDF and RDF,
Neem cake @ 1 t/ha recorded highest green chilli yield of 83.47 q/ha being on par with
RDF (79.00 q/ha) and RPP (89.33 q/ha). These were followed by vermicompost @ 2 t/ha
+ 50 per cent RDF (76.00 q/ha) and neem cake @ 0.5 t/ha + 50% RDF (72.00 q/ha).
Highest B:C ratio of 3.88 was noticed in neem cake @ 1 t/ha from among the organic
amendments evaluated.
Studies on the effect of indigenous sprays on H. armigera in chilli revealed that
from among the indigenous products NSKE 5 per cent recorded lowest mean egg
(1.15/plant), larval population (1.01/plant) and per cent fruit damage in NSKE 5 per cent
(7.57%). This was followed by garlic chilli kerosene extract 3 per cent, NSKE 5 per cent +
cow urine 10 per cent and NSKE 5 per cent + garlic extract 10 per cent. The efficacy of
NSKE 5 per cent (79.32 q/ha), NSKE 5 per cent + cow urine 10% (78.00 q/ha), garlic chilli
kerosene extract 3 per cent (76.23 q/ha), NSKE 5 per cent + garlic extract 3 per cent
(83.67 q/ha) remained same in recording higher yield of green chilli.
All the organic amendments evaluated either alone or their half doses in
combiantion with 50 per cent RDF were safe to coccinellids {Menochiilus sexmaculatus
Fab and Coccinella septumpunctata Thumb.) and Chrysoperal carnea Steph. in chilli
ecosystem. All the indigenous sprays included in the study were safe to coccinellids and
C. carnea except garlic chilli kerosene extract 3 per cent."
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