4.6 Article

A push-pull strategy to control the western flower thrips, Frankliniella occidentalis, using alarm and aggregation pheromones

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PLOS ONE
卷 18, 期 2, 页码 -

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PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0279646

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Since its first report in 1993 in Korea, the western flower thrips, Frankliniella occidentalis, has been causing significant damage to crops, especially in greenhouses. To address this issue, a non-chemical technique using pheromones was developed to control the thrips infestation in greenhouse-grown hot peppers. Field experiments showed that behavioral control using alarm and aggregation pheromones effectively reduced the thrips population in flowers and monitoring traps. This push-pull strategy has the potential to be an efficient method for managing F. occidentalis in field conditions.
Since the first report in 1993 in Korea, the western flower thrips, Frankliniella occidentalis, has been found in various crops throughout the country. Although more than 20 different chemical insecticides are registered to control this insect pest, its outbreaks seriously damage crop yields, especially in greenhouses. This study developed a non-chemical technique to control F. occidentalis infesting hot peppers cultivated in greenhouses. The method was based on behavioral control using an alarm pheromone (Push) to prevent the entry of the thrips into greenhouses and an aggregation pheromone (Pull) for mass trapping inside the greenhouses. The greenhouse fences were treated with a wax formulation of the alarm pheromone and a yellow CAN trap covered with sticky material containing the aggregation pheromone was constructed and deployed inside the greenhouses. Field assay demonstrated the efficacy of the push-pull tactics by reducing thrips density in flowers of the hot peppers as well as in the monitoring traps. Especially, the enhanced mass trapping to the CAN trap compared to the conventional yellow sticky trap led to significant reduction in the thrips population. This novel push-pull technique would be applicable to effectively control F. occidentalis in field conditions.

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