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1 December 2011 Refrigerated Eggs of Riptortus pedestris (Hemiptera: Alydidae) Added to Aggregation Pheromone Traps Increase Field Parasitism in Soybean
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Abstract

Riptortus pedestris (F.) (Hemiptera: Alydidae) is a key pest of soybean [Glycine max (L.) Merr.] in Korea and Japan. Aggregation pheromone traps have been used to attract R. pedestris. An aggregation pheromone, produced by males of R. pedestris, also attracts the egg parasitoid, Ooencyrtus nezarae Ishii (Hymenoptera: Encyrtidae). As a new method of pest management, we propose the use of nonviable host eggs in the pheromone trap together to both trap R. pedestris and propagate parasitoids on host eggs attached to the trap. ≈Ten-thousand nonviable refrigerated host eggs were placed outside pheromone traps in three soybean fields (0.167–0.284 ha.). During the sampling period from 7 August to 8 October in 2008, statistical significance of treatment was not found in any life stage of R. pedestris population. However, significantly higher parasitism of both natural (78–91%) and refrigerated eggs (36–59%) occurred in the treatment sites, compared with control sites where parasitism was 0–62% and 16-34% on natural and refrigerated eggs, respectively. The proportion of bean pods with stink bug feeding damage was significantly reduced by 47% in the treatment sites. This study is the first trial of an integrated pest management (IPM) strategy using both nonviable host eggs and trap that simultaneously targets both the pest and its natural enemy.

© 2011 Entomological Society of America
Md. Abdul Alim and Un Taek Lim "Refrigerated Eggs of Riptortus pedestris (Hemiptera: Alydidae) Added to Aggregation Pheromone Traps Increase Field Parasitism in Soybean," Journal of Economic Entomology 104(6), 1833-1839, (1 December 2011). https://doi.org/10.1603/EC11143
Received: 5 May 2011; Accepted: 1 August 2011; Published: 1 December 2011
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