Invasive Species Compendium

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Abstract

Dispersal of adults of American Serpentine Leafminer, Liriomyza trifolii (Burgess) (Diptera: Agromyzidae) in fields.

Abstract

The dispersal of L. trifolii adults in fields in Japan was studied using yellow sticky traps placed horizontally and vertically near an eggplant [aubergine] greenhouse severely infested by L. trifolii. The number of adults captured by the traps placed vertically 0.5-5.5 m above the ground decreased with increased trap height. The number of adults captured by traps at 5.5 m above the ground formed between 0.0 and 0.2% of the total number of adults captured by all vertical traps. The number of adults captured by traps placed horizontally from east to west decreased with distance from the greenhouse. The number of adults captured by traps 48 m east of the greenhouse formed between 1.4 and 1.9% of the total number of adults captured by all horizontal traps placed east of the greenhouse. The sex ratio of captured adults was male-biased. The number of females was 9.4 to 31.7% of captured adults for vertical traps, and 9.1 to 29.9% for horizontal traps. The female ratio tended to decrease with the number of captured adults. There was a significant correlation between sex ratio and the number of captured adults.