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- W1495486531 abstract "A two-year study was conducted to determine levels of parasitism of the American serpentine leafminer, Liriomyza trifolii (Burgess) in onion grown after rice in the provinces of Nueva Ecija, Nueva Viscaya and Pangasinan in Luzon, Philippines in 2003 and 2004. In 2003, larval parasitism in Nueva Ecija ranged from 10.5 to 18.6% compared to 15 to 41% parasitism in Nueva Viscaya. Mean larval parasitism was 13.5% and 26.1% in N. Ecija and N. Viscaya, respectively. Higher levels of larval parasitism in Nueva Viscaya were attributed to fewer insecticide sprays applied to onion fields. Samples taken in 2004 included those collected from Pangasinan province. Onion leaves were collected during the vegetative and bulb maturity stages. Mean larval parasitism during the bulb formation stage was 24%, 26% and 28% in the samples from Nueva Ecija, Nueva Viscaya and Pangasinan, respectively. Slightly lower parasitism was recorded during the bulb maturity stage in all locations. Parasitism levels were lower in Nueva Viscaya and Pangasinan compared to that in Nueva Ecija during later stages of crop growth. Percent damaged leaves was also lower in Nueva Viscaya and Pangasinan. High percentage of parasitism suggests that parasitoids are important mortality factors. Conservation of these naturally occurring beneficial organisms is important as a component management strategy against L. trifolii in onion and other crops. Key words: leafminer, larval parasitism, naturally occurring biocontrol agents" @default.
- W1495486531 created "2016-06-24" @default.
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- W1495486531 date "2014-06-03" @default.
- W1495486531 modified "2023-09-27" @default.
- W1495486531 title "PARASITISM OF LEAFMINER Liriomyza trifolii (Burgess) (Diptera: Agromyzidae) LARVAE ON ONION GROWN AFTER RICE IN CENTRAL LUZON PHILIPPINES" @default.
- W1495486531 hasPublicationYear "2014" @default.
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