Screening for Sarawak Paddy Landraces with Resistance to Yellow Rice Stem Borer, Scirpophaga incertulas (Walker) (Lepidoptera: Crambidae)
The yellow rice stem borer, Scirpophaga incertulas (Walker) is a prevalent pest in paddy fields worldwide. In Sarawak, a survey on pest of paddy carried out from 2009 to 2011 covering 166 paddy fields revealed that rice stem borers caused 11.4% of total paddy damage. In order to reduce the damage...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | en |
| Published: |
Universiti Putra Malaysia Press
2020
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/33518/1/Screening%20for%20Sarawak%20Paddy%20Landraces%20with%20Resistance.pdf http://ir.unimas.my/id/eprint/33518/ http://www.pertanika.upm.edu.my/ |
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| Summary: | The yellow rice stem borer, Scirpophaga incertulas (Walker) is a prevalent pest in paddy
fields worldwide. In Sarawak, a survey on pest of paddy carried out from 2009 to 2011
covering 166 paddy fields revealed that rice stem borers caused 11.4% of total paddy
damage. In order to reduce the damage, identifying resistance paddy variety is crucial.
The objective of this study was to screen Sarawak paddy landraces with resistance to
S. incertulas.Twelve Sarawak paddy
landraces were selected randomly for this
study. Antixenosis resistance screening
was performed in aquariums (60 x 28 x
33 cm). Three replications of one-monthold
seedlings were randomly arranged in
aquarium and exposed to adult S. incertulas.
The number and position of egg mass
on each plant were recorded. Egg mass
abnormalities were also observed. For
antibiosis, rice culms of two-month old
seedlings from each landrace were infestedwith larvae. The length of surviving larvae
from five rice culms was measured. The
experiment revealed variations in landraceof preference for ovipositing. Among the
twelve Sarawak paddy landraces, Kanowit
was more preferred by S. incertulas for
ovipositing in comparison to other paddy
landraces suggesting susceptibility towards
the pest. Abaxial leaf surface was the
preferred oviposition site. There was no
clear antibiosis response of the paddy
landraces towards S. incertulas larvae in
this study.
Keywords: Antibiosis, antixenosis, rice insect pest |
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