Parasitoid abundance, incidence of larval parasitism, and effect of trap color on the attraction of the onion leafminer, Liriomyza trifolii (Burgess)

Issue Date

10-2004

Abstract

Damaged onion leaves bearing larvae of L. trifolii were collected from Nueva Ecija and N. Viscaya provinces during the 2003 onion season. Level of parasitism in Nueva Ecija ranged from 10.5 to 18.6%, compared to 15 to 41% for larvae collected from Nueva Viscaya. Mean larval parasitism was 13.5% and 26.1% in Nueva Ecija and Nueva Viscaya, respectively. This could be attributed to the higher frequency of insecticide application in Nueva Ecija than in Nueva Viscaya. In earlier studies, it was found that insecticides are detrimental to natural enemies of L. trifolii. Different colors of sticky board traps were evaluated to determine which was the most attractive to adult L. trifolii in the field. Yellow sticky board traps caught significantly more adult flies than the blue, purple or white colored traps. The combination of natural biological control agents like larval parasitoids and use of yellow sticky board traps against L. trifolii could be an important component of a management strategy against this insect on onion and other vegetable crops.

Source or Periodical Title

Philippine Entomologist

ISSN

0048-3753

Volume

18

Issue

2

Page

173

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

LIRIOMYZA TRIFOLII; STICKY TRAPS; TRAPS; INSECTICIDES; BIOLOGICAL CONTROL AGENTS; PARASITISM

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