Bio Management of root-knot nematode, meloidogyne incognita (Kofoid and White, 1919) chitwood, 1949 in tuberose (Polianthes tuberosa L.)
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Date
2021
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Department of Nematology, OUAT, Bhubaneswar
Abstract
A pot culture experiment was conducted in the net house of Department of Nematology,
College of Agriculture, OUAT, Bhubaneswar during 2020-2021 to study the efficacy of the
fungal antagonists (Purpuriocelium lilacinum and Trichoderma viride) and organic
amendment (Neem oil cake) in alone and their combinations for the management of root knot
nematode, Meloidogyne incognita in tuberose (cv. Prajwal). Apart from this treatments a
standard chemical check (carbofuran 3G @1kg a.i /ha) and an untreated inoculated check were
maintained for comparison. The experiment was designed in Complete Randomized Design
(CRD) with seven treatments i.e. T1 - Neem cake @ 1 t/ha, T2 - Trichoderma viride @ 2.5
kg/ha, T3 -of Purpureocillium lilacinum 2.5 kg/ha, T4 -Neem cake@ 1 t/ha + Trichoderma
viride @2.5 kg/ ha, T5 -Neem cake@ 1 t/ha + Purpureocillium lilacinum@2.5 kg/ ha, T6 -
Carbofuran 3G @ 1 kg a.i /ha, T7 - Untreated inoculated check, which were replicated thrice.
The result indicated that all the treatments in the experiment not only reduced the nematode
growth but also enhanced the plant growth significantly over untreated inoculated check. The
combined application of oil cake and bioagent gave better results than their single applications.
Among all the treatments, T5 (Soil application of Neem cake @1t/ha followed by soil
application of Purpureocillium lilacinum @ 2.5 kg/ ha) recorded the maximum increase in
plant height (50.90%), fresh shoot weight (88.52%), dry shoot weight (99.62%), root length
(94.56%), fresh root weight (95.44%) dry root weight (99.80%) with maximum reduction in
number of galls/plant (88.27%), number of egg masses/plant (91.30%) and nematode
population per 200cc of soil (75.20%) over the untreated inoculated check along with lowest
gall index (3.0) followed by T4 (soil application of Neem cake@1t/ha with soil application of
Trichoderma viride@ 2.5kg/ha.
Description
TH - 6590