Investigation on the 2016 outbreak of the onion armyworm, spodoptera exigua (Hubner) (Lepidoptera: Noctuidae), in onion growing areas in Nueva Ecija
Issue Date
10-2017
Abstract
The extent of infestation of armyworm on onion and possible cause of its outbreak in 2016 in Nueva Ecija were determined through site visits, interview and dialogue with farmers, and review of pertinent literature. Notes on its biology are also provided. The species involved in the outbreak was identified as Spodoptera exigua (Hubner). Fourteen municipalities covering 5,330 hectares and involving 4,089 farmers were affected. An estimated total loss of PHP 1,609,997,316.00 was incurred from February to April 2016. S. exigua, a host: Capsicum annuum L., Cucurbita maxima Duchesne, Momordica charantia L., Vigna unguiculata (L.) Walp., Zea mays L., Achyranthes aspera L., Amaranthus viridis L., Centrocema pubescens Benth., Commelina benghalensis L., Eleusine indica (L.) Gaertn, Synedrella nodiflora (L.) Gaertn., Rottboellia conchinchinensis (Lour.) Clayton, and Tagetes sp., Developmental period of onion armyworm reared on fruits of stringbeans ranged from 16-25 days. Outbreak is suspected to have resulted from mass long distance migration from countries northeast of the Philippines, which could have been triggered by El Niño.
Source or Periodical Title
The Philippine Entomologist
ISSN
0048-3753
Volume
31
Issue
2
Page
151-152
Document Type
Article
College
College of Agriculture and Food Science (CAFS)
Frequency
semi-annually
Language
English
Recommended Citation
Navasero, Mario V.; Navasero, Marcela M.; Cayabyab, Bonifacio; Ebuenga, Melvin D.; Candano, Randolph N.; Burgonio, Gideon Aries S.; Bautista, Nelson M.; Aquino, Evergilio M. Jr.; and Gaspar, Grandeur G., "Investigation on the 2016 outbreak of the onion armyworm, spodoptera exigua (Hubner) (Lepidoptera: Noctuidae), in onion growing areas in Nueva Ecija" (2017). Journal Article. 4066.
https://www.ukdr.uplb.edu.ph/journal-articles/4066
En – AGROVOC descriptors
ONIONS; SPODIPTERA EXIGUA; INSECTA; PESTS; PEST OF PLANTS; MIGRATORY PEST; PEST MONITORING; ANIMAL MIGRATION; INFESTATIONS