scholarly journals Noxiousness of the african white stem borer, Maliarpha separatella Rag (Pyralidae: Phycitinae) in irrigated paddy fields at lake Alaotra (Madagascar)

1993 ◽  
Vol 14 (5-6) ◽  
pp. 667-673
Author(s):  
G. Bianchi ◽  
B. Rasoloarison ◽  
M. Genini
EUGENIA ◽  
2018 ◽  
Vol 23 (3) ◽  
Author(s):  
J. Manueke ◽  
B. H. Assa ◽  
E. A. Pelealu

ABSTRACT The purpose of this research is to know  the pest species in wetland rice crops at Makalonsow Village of East Tondano Distric in Minahasa Regency. The study used a descriptive obsevational method that is observing directly the pests found in rice paddy fields by means of sweeping with insect net and observing directly on paddy fields plaot and paddy fields clumps. The identified pests were identified and made in accordance with the results of identification for each species of pest.  The results showed that 11 species of pests and 4 spesies of natural enemies found in paddy fields of wetland rice at Makalonsow Village of East Tondano District in Minahasa Regency.  The pests are White Rice Stem Borer (Tryporyza innotata), Rice Cherry Stem Borer (Chilo suppressalis), Purple Rice Stem Borer (Sesamia inferens), White Pest (Nymphula depunctalis), Brown Planthopper (Nephotettix virescens), Green Planthopper (Nilaparvata lugens), Paddy Stink Bug (Leptocorisa acuta), Black Lady Bug (Pareaucosmetus sp.), Rice Weevil   (Sitophilus oryzae), Golden Snail (Pomacea caniculata), Hous and Tre Sparow (Passer spp.), and Rice-field Rat (Ratus argentiventer.). Natural enemies are Worship Grasshopper (Mantis sp.), Dragonflies (Sympetrum flaveolum), Coccinelid Beetle (Coccinella septempunctata), and Spider Hunters (Pardosa sp.).Keywords : plant pest, wetland rice crops,  natural enemies of pest ABSTRAK Tujuan penelitian adalah mengetahui jenis-jenis hama pada tanaman padi sawah di Kelurahan Makalonsow Kecamatan Tondano Timur Kabupaten Minahasa. Penelitian menggunakan metode obsevasional deskriptif yaitu mengamati langsung hama yang ditemukan pada areal tanaman padi sawah dengan cara penyapuan dengan net serangga dan mengamati langsung pada petakan sawah dan rumpun tanaman padi sawah. Hama-hama yang ditemukan diidentifikasi dan dibuat deskripsi sesuai dengan hasil identifikasi untuk setiap jenis hama. Hasil penelitian menunjukkan bahwa ditemukan 11 jenis hama dan 4 jenis musuh alami padahabitat tanaman padi sawah di Kelurahan Makalonsow Kecamatan Tondano Timur Kabupaten Minahasa. Hama-hama tersebut yaitu Penggerek batang padi putih (Tryporyza innotata), Penggerek Batang Padi Bergaris (Chilo suppressalis), Penggerek Batang Padi Ungu (Sesamia inferens), Hama Putih (Nymphula depunctalis), Wereng Coklat (Nephotettix virescens), Wereng Hijau (Nilaparvata lugens), Walang Sangit (Leptocorisa acuta), Kepik Hitam (Pareaucosmetus sp.), Bubuk Beras (Sitophilus oryzae), Keong Emas (Pomacea caniculata), Hama Burung Padi Sawah (Passer spp.), dan Hama Tikus Sawah (Ratus argentiventer).  Musuh alami yaitu  Belalang Sembah (Mantis sp.), Capung (Sympetrum flaveolum), Kumbang Coccinelid (Coccinella septempunctata), dan Laba-Laba Pemburu (Pardosa sp.).Kata kunci : hama tanaman, tanaman padi sawah, musuh alamiah hama


Author(s):  
Alvin Xian Rong Ling ◽  
Freddy Kuok San Yeo ◽  
Nur Najwa Hamsein ◽  
Hieng Ming Ting ◽  
Mogeret Sidi ◽  
...  

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-month-old 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 infested with larvae. The length of surviving larvae from five rice culms was measured. The experiment revealed variations in landrace of 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.


2021 ◽  
Author(s):  
Claire Beverley

Abstract M. separatella is a stem borer of sub-Saharan and Indian Ocean islands and is the only rice stem borer that has widespread distribution in sub-Saharan Africa. Damage by M. separatella includes reduced plant height, total number of grains per panicle, number of filled grains per panicle and grain weight, depending on the plant stage attacked.


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