Report on Two Egg Parasitoid Species of Riptortus clavatus (Thunberg) (Heteroptera: Alydidae) on Soybean

Paik, Chae-Hoon; Lee, Geon-Hwi; Choi, Man-Young; Seo, Hong-Yul; Kim, Doo-Ho; la, S. L. de; Park, Chung-Gyoo

doi:10.5656/ksae.2007.46.2.281

Cited by 22 publications

(11 citation statements)

References 8 publications

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“…Synchronization of field activity and the life cycle of egg parasitoids with that of their hosts has been addressed in several studies (Orr, 1988). Hirose et al (1996) reported that the attack on R. pedestris eggs by O. nezarae was highest among egg parasitoids throughout most of the host oviposition period in two experimental years; however, Paik et al (2007) reported that the parasitism rate on released eggs of R. pedestris by G. japonicum was 96% during early August to mid-October. The discrepancy between the results of Paik et al (2007) and others, including this study, may be the result of various factors, such as regional or climatic differences and sampling methods.…”

Section: Field Occurrence Of Parasitism By R Pedestris Egg Parasitoidsmentioning

confidence: 99%

“…R. pedestris causes significant damage to soybean pods in the reproductive stages (Ha et al, 1998;Son et al, 2000;Jung et al, 2008). The native egg parasitoid guild that attacks R. pedestris in soybeans in Korea includes Ooencyrtus nezarae Ishii (Hymenoptera: Encyrtidae) and Gryon japonicum (Ashmead) (Hymenoptera: Scelionidae) (Huh and Park, 2005;Paik et al, 2007). O. nezarae is a gregarious egg parasitoid of R. pedestris that parasitizes 13 species of hemipteran bugs (Hirose et al, 1996;Zhang et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Seasonal occurrence pattern and within-plant egg distribution of bean bug, Riptortus pedestris (Fabricius) (Hemiptera: Alydidae), and its egg parasitoids in soybean fields

Kim

Lim

2010

Appl. Entomol. Zool.

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A study on the seasonal occurrence and within-plant distribution of Riptortus pedestris (Fabricius) (Hemiptera: Alydidae) and its two egg parasitoids was conducted to evaluate the effectiveness of parasitoids as a biological control agent in soybean fields. We sampled soybean plants during the planting seasons in 2007 and 2008 in Andong, Korea. Adult R. pedestris occurrence and egg deposition began at the R2-R4 stage of soybean. Nymphs started to appear during the R5 stage of soybean. Peak population densities of both eggs and adults were recorded in the R5 stage of soybean, whereas that of nymphs started in the R6 stage. Seasonal total parasitism by Ooencyrtus nezarae Ishii (Hymenoptera: Encyrtidae) was significantly higher than Gryon japonicum (Ashmead) (Hymenoptera: Scelionidae). For the withinplant distribution of R. pedestris eggs, 90% were found on leaves and 70% on the under-leaf surface. Egg parasitism by O. nezarae was higher on the leaf surface than on pods. Results suggest that R. pedestris starts to occur at the R2-R4 stages of field soybeans regardless of seed sowing time, and population density peaks after the R5 stage. Sampling eggs on leaves is an alternative method to measure R. pedestris populations in the field since most eggs are found on leaves. Since O. nezarae was synchronous with the bugs' occurrence, it would be a more efficient biological control agent of R. pedestris than G. japonicum.

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Section: Field Occurrence Of Parasitism By R Pedestris Egg Parasitoidsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seasonal occurrence pattern and within-plant egg distribution of bean bug, Riptortus pedestris (Fabricius) (Hemiptera: Alydidae), and its egg parasitoids in soybean fields

Kim

Lim

2010

Appl. Entomol. Zool.

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“…Among these species, the major egg parasitoids of R. pedestris in Korea are G. japonicum and O. nezarae (Paik et al, 2007;Mainali and Lim, 2012).…”

Section: Introductionmentioning

confidence: 99%

Effects of fenitrothion on Gryon japonicum (Hymenoptera: Platygastridae) parasitizing non-viable, refrigerated eggs of Riptortus pedestris (Hemiptera: Alydidae)

Alim

Lim

2015

Journal of Asia-Pacific Entomology

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“…Field parasitism rate on the eggs of R. clavatus by O. nezarae was found to be 0.59 in Fukuoka, Japan, six times higher than the para-sitism rate by G. japonicum; however, a high parasitism rate by O. nezarae occurred in soybean fields during the first half of a host infestation period only due to the high dispersal ability of females. Furthermore, the field parasitism rate by the two parasitoids has been reported to vary depending on the location and/or host plant, e.g., Noda (1989) and Paik et al (2007) found higher parasitism by G. japonicum than by O. nezarae in other locations in Japan and Korea, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Ooencyrtus nezarae Ishii (Hymenoptera: Encyrtidae) and Gryon japonicum Ashmead (Hymenoptera: Scelionidae) are major parasitoids of R. clavatus in Korea and Japan (Mizutani, 1994;Teraoka and Numata, 2004;Paik et al, 2007). Ooencyrtus nezarae is a gregarious parasitoid attacking 13 heteropteran species (Hirose et al, 1996;Zhang et al, 2005) whereas G. japonicum is a solitary parasitoid of four species of plant bugs, including R. clavatus (Noda, 1993).…”

Section: Introductionmentioning

confidence: 99%

Inoculation of refrigerated non-viable eggs of Riptortus clavatus (Heteroptera: Alydidae) to enhance parasitism by egg parasitoids in soybean field

Lim

Mahmoud

2009

Appl. Entomol. Zool.

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Riptortus clavatus Thunberg (Heteroptera: Alydidae) is an important soybean pest in Korea and Japan. Chemical application is a common control method against R. clavatus although it is not always effective at reducing crop damage. As a biological control, the release of refrigerated stink bug eggs has been suggested because the eggs become non-viable but can still be parasitized by parasitoids. We evaluated the inoculation of refrigerated eggs of R. clavatus as a method to enhance natural parasitism. Overall, 9,000-10,600 refrigerated eggs of R. clavatus were inoculated in soybean fields. A higher seasonal parasitism rate on both natural and released host eggs was found at the treated sites. Gregarious parasitoids, including Ooencyrtus nezarae Ishii (Hymenoptera: Encyrtidae) and solitary Gryon japonicum Ashmead (Hymenoptera: Scelionidae), emerged from natural eggs. On the released eggs, the parasitism rate by gregarious parasitoids was greatly reduced for an unknown reason. The proportion of bean pods with stylet sheaths as an index of crop damage was also significantly reduced; however, neither the seasonal number of unparasitized eggs nor nymphs and adults of R. clavatus was affected by host egg inoculation. This is the first trial to inoculate non-viable host eggs to enhance natural parasitism.

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Report on Two Egg Parasitoid Species of Riptortus clavatus (Thunberg) (Heteroptera: Alydidae) on Soybean

Cited by 22 publications

References 8 publications

Seasonal occurrence pattern and within-plant egg distribution of bean bug, Riptortus pedestris (Fabricius) (Hemiptera: Alydidae), and its egg parasitoids in soybean fields

Seasonal occurrence pattern and within-plant egg distribution of bean bug, Riptortus pedestris (Fabricius) (Hemiptera: Alydidae), and its egg parasitoids in soybean fields

Effects of fenitrothion on Gryon japonicum (Hymenoptera: Platygastridae) parasitizing non-viable, refrigerated eggs of Riptortus pedestris (Hemiptera: Alydidae)

Inoculation of refrigerated non-viable eggs of Riptortus clavatus (Heteroptera: Alydidae) to enhance parasitism by egg parasitoids in soybean field

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