Monitoring Rice Stem Borer, Chilo Polychrysus (Lepidoptera: Crambidae) And Insecticidal Activity Of Selected Insecticides
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Date
2021-09
Authors
Nur Atiqah Binti Mohd Khari
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia.
Abstract
Monitoring of rice stem borer insecticidal activity has been initiated by
studying the abundance and infestation level of rice stem borer in MADA area,
constructing the life table of Chilo polychrysus and determining the insecticdal
efficacy of selected commercial insecticides towards C. polychrysus in the
glasshouse. The study revealed that Region 3 (Hutan Kampung, Tajar and Pendang)
was the most highly infested by rice stem borer followed by Region 4, Region 2 and
Region 1. Among the three districts evaluated in Region 3, Pendang suffered the
highest rice stem borer infestation at specific location, Pendang B with 20.53% of
infestation. Season one (November to February) recorded the greatest infestation
during the vegetative stage of the rice plant with 30.83% of dead heart. The rice stem
borer was observed to infest at optimum level with lower value of RHmax (80.0%),
higher Tdiff (32.8oC) and lower amount of rainfall (0.6mm). Three species were
found at all four regions in MADA and that were Chilo polychrysus (black-headed
stem borer), Sesamia inferens (pink stem borer) and Scripophaga incertulas (yellow
stem borer). Chilo polychrysus (black-headed stem borer) was once a predominant
species of rice stem borer in Malaysia and have became dominant in this study at
Region 1.
Description
Keywords
Monitoring Rice Stem Borer , Chilo Polychrysus (Lepidoptera: Crambidae) , Insecticidal Activity Of Selected Insecticides