Rice (Oryza sativa), an important staple food crop consumed
widely in Asian countries, is attacked by several pests. The crop is enriched
with a high amount of carbohydrates, protein, and fats. It provides more than
1/5th of the calories consumed by humans worldwide. Among the pests, the Gundhi
bug or ear head bug (Leptocorisa spp.) is one of the major pests of rice.
Leptocorisa spp feeds on rice, leading to losses caused by empty spikelets,
small and misshapen kernels, and pecky kernels with unsavoury black spots.
Botanicals are now gaining importance to manage crop pests and protect the
environment from the toxic effects of pesticides, causing pollution, which is a
global concern. Therefore, the present study was undertaken in three
consecutive kharif seasons from 2017 to 2019 at the Regional Research Station
(Old Alluvial Zone), UBKV, Majhian, Dakshin Dinajpur, West Bengal, to evaluate
bio-efficacy of different botanicals against rice ear head bug (Leptocorisa
spp.). The experimental design was laid out in RBD (Randomised Block Design)
using ten treatments and three replications. All the treatments were superior
to the control. The mean pooled data of three years exhibited that the Neem
Seed Kernel extracts 5%was recorded lowest population (1.80) and highest yield
(27.03 quintal/ha) over control and followed by Neem oil 1% (2.08/hill),
Pongamia seed kernal extract 5% (2.14/hill), Karanja oil 1% (2.30/hill),
Jatropha leaf extract 10% (2.47/hill), Custard apple leaf extract 10%
(2.56/hill), Jatropha leaf extract 5%( 2.92/hill) and Custard apple leaf extract 5%
(3.05/hill). The untreated control plot recorded the highest population of ear
head bug (6.24 /hill) and the lowest grain yield (15.06 q/ha). Considering two
parameter efficacy and yield, Neem Seed Kernel extracts 5% was found most
effective treatment amongst the botanicals.
Author(s) Details
Tapas Kumar Hembram
Regional Research Station (Old Alluvial Zone), Uttar Banga Krishi
Viswavidyalaya, Dakshin Dinajpur, West Bengal-733133, India.
Md. Ali Azgar
Regional Research Station (Old Alluvial Zone), Uttar Banga Krishi
Viswavidyalaya, Dakshin Dinajpur, West Bengal-733133, India.
Rakesh Yonzone
College of Agriculture (Extended Campus), Uttar Banga Krishi
Viswavidyalaya, Dakshin Dinajpur, West Bengal-733133, India.
Dipak Kumar Murmu
Regional Research Station (Old Alluvial Zone), Uttar Banga Krishi
Viswavidyalaya, Dakshin Dinajpur, West Bengal-733133, India.
Please see the book here :- https://doi.org/10.9734/bpi/rpbs/v7/6395
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