Stem borer infestation in selected traditional rice cultivars

Jamilah Rosli, . (2008) Stem borer infestation in selected traditional rice cultivars. [Project Paper] (Submitted)

Text lp FSPM 2008 21.pdf Download (5MB)

Abstract

Stem borer are among the major pests of rice. This study was conducted to evaluate the infestation and damage caused by stem borer on four commonly planted traditional local rice cultivar namely Selasih, Bario Banjal, Tulang and Muyun. These traditional local cultivars were evaluated in the field under natural infestation condition in the paddy planting areas in Kuala Tatau, Binlulu. Cultivars showed significant differences in morphology especially in plant height, stem diameter and number of tillers per hill with Selasih at 150.71 cm, 0.98 cm diameter and 16 tillers, Bario Banjal at 142.31 cm. 0.78 cm diameter and 14 tillers, Tulang at 172.98 cm, 0.87 cm diameter and 10 tillers and Muyun at 140 cm, 1.01 cm diameter and 12 tillers respectively. Stem borer species identified at the study area were pink stem borer (Sesamia inferens), black headed stem borer (Chilo polychrysus) and yellow stem borer (Scirpophaga incertulas). Pink stem borer was first to infest the rice plant at 25 days after transplanting (DAT) causing 'dead heart' symptom to the plant while yellow stem borer was dominant at the reproductive stage of the plant causing 'white head' symptom of damage. The dark headed stem borer was present throughout both vegetative and reproductive stage of the plant but in lower numbers. Yellow and pink stem borer were abundantly found in the rice field with density of 0.93 larvae/ m2 and 0.88 larvae/ m2 respectively of rice planted area compared to dark headed stem borer with density of 0. 73 larvae/ m2. Pink and dark headed stem borers preferred Selasih and Tulang cultivars while yellow stem borer preferred Bario Banjal and Muyun cultivars. Damage assessment showed Selasih had the highest damage percentage (12.05%) followed by Muyun (8.78%), Tulang (7.56%) and Bario Banjal (7.02%). Pearson Correlation Coefficients shows positive relationship between damage percentages to plant characteristics such as stem diameter and numbers of tiller per plant. Selasih was the most susceptible cultivar to stem borer attack as a result of its morphological attributes such as broad stems and large number of tillers.

Item Type:	Project Paper
Subjects:	S Agriculture > S Agriculture (General)
Faculty:	Faculty of Agriculture and Food Sciences
Depositing User:	Ms. Hairoon Juhaili
Date Deposited:	11 May 2026 01:11
Last Modified:	11 May 2026 01:11
URI:	http://psaspb.upm.edu.my/id/eprint/2737

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