Population dynamics of the leafminer, Liriomyza trifolii (Burgess)(Diptera:Agromyziidae), in onion (Allium cepa L.) fields planted after rice
Issue Date
10-2003
Abstract
A 2-year study was conducted on the population dynamics of Liriomyza trifolii (Burgess) in weekly-sprayed and unsprayed onion fields in Bongabon, Nueva Ecija, Philippines. Nueva Ecija province is known for large area cultivation of onion during the drier months of December to May. Changes in population density of L. trifolii larvae and adult flies, adult mines, damaged leaves, and natural enemies were recorded over a crop period. There were little differences noted in the above parameters studied between sprayed and unsprayed plots except for a significant reduction in larval parasitism and number of predators recorded on the weekly-sprayed plots. Peak population densities of larvae and damaged leaves were recorded when the crop neared maturity, so it was doubtful if losses would still be incurred at this time when bulbs were almost ready for harvest. Results of this 2-year study showed that spraying by farmers with the most commonly used insecticides (chlorpyrifos + BMPC) was not effective against L. trifolii but detrimental to its naturally occurring parasitoids and predators.
Source or Periodical Title
Philippine Entomologist
ISSN
0048-3753
Volume
17
Issue
2
Page
191-192
Document Type
Article
Frequency
semi-annually
Language
English
Recommended Citation
Arida, G . S.; Punzal, B. S.; Ravina, C. C.; Tiongco, E. R.; and Rajotte, E. G., "Population dynamics of the leafminer, Liriomyza trifolii (Burgess)(Diptera:Agromyziidae), in onion (Allium cepa L.) fields planted after rice" (2003). Journal Article. 5748.
https://www.ukdr.uplb.edu.ph/journal-articles/5748
En – AGROVOC descriptors
ALLIUM CEPA; LIRIOMYZA TRIFOLII; PLANT PESTS; CHLORPRRIFOS; NATURAL ENEMIES; PREDATORS