Population dynamics of aphid vectors and effect on Abaca mosaic epidemics

Issue Date

10-2009

Abstract

Trapped aphids in abaca plantations in Baybay, Leyte were: Aphis gossypii Glover, Aphis spiraecola Patch, Ceratovacuna lanigera Zehntner, Greenidea formosana (Maki), Pentaionia nigronervosa Coquerel, and Toxoptera odinae (van der Goot). Both alates and apterae of P. nigronervosa were found infesting abaca plants in the sites. Abaca mosaic incidence was not correlated with the total number of aphids and number of alate aphids per plant but highly correlated with the number of trapped aphids in the area. Abaca mosaic disease incidence continued to increase progressively as the number of trapped aphids increased. Temperature and relative humidity showed a profound effect on the number of alate aphids per plant and number of trapped aphids, respectively. Temperature appeared to enhance multiplication and wing bud formation of aphids while wind velocity favored aphid take-off and enhanced movements of alate aphids in the abaca plantations. These effects significantly influenced the level of abaca mosaic incidence.

Source or Periodical Title

Philippine Entomologist

ISSN

0048-3753

Volume

23

Issue

2

Page

115-130

Document Type

Article

Frequency

semi-annually

Physical Description

graphs ; tables; illustrations

Language

English

En – AGROVOC descriptors

APHIDOIDEA; ABACA; PLANT DISEASES; EPIDEMICS; POPULATION DYNAMICS

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