Descriptions of immature stages of Mythimna venalba (Moore) (Lepidoptera: Noctuidae)
An outbreak of the cutworm Mythimna venalba (Moore) had caused a huge loss to rice farmers in 2011 in Peninsular Malaysia. This is due to the late identification of the larvae, which appears to be one of the rice pests. This study presents the morphological descriptions of immature stages of M. v...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Pusat Sistematik Serangga, Universiti Kebangsaan Malaysia
2021
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| Online Access: | http://journalarticle.ukm.my/18992/ http://journalarticle.ukm.my/18992/1/46078-173404-1-PB.pdf |
| Summary: | An outbreak of the cutworm Mythimna venalba (Moore) had caused a huge loss to rice farmers
in 2011 in Peninsular Malaysia. This is due to the late identification of the larvae, which appears
to be one of the rice pests. This study presents the morphological descriptions of immature
stages of M. venalba including the larval chaetotaxy in detail. The larvae of M. venalba were
collected from several rice fields in Peninsular Malaysia, and they were reared and maintained
in the laboratory to establish a colony. Ten specimens of egg, larva, pupa and adult from the
colony were selected and observed for morphological descriptions and larval chaetotaxy. The
external morphology of the eggs, larvae, pupae, and adults was described and illustrated.
Important taxonomic structures of the larvae were discussed. The absence of G2 seta in the
cranial chaetotaxy and the L1 seta situated just slightly anterior to SD1 on the A9 segment of
the abdominal chaetotaxy are good characters to distinguish M. venalba from other Mythimna
species. |
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