• Korean journal of applied entomology
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• v.37 no.1
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• pp.73-80
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• 1998

The natural enemies of Black pine bast scale (Matsucoccus thunbergianae) were surveyed total 24species, 7families, 4orders in predatory insects and 29species 1 lfamilies in a predatory spiders. In insect, Coleoptera IOspecies, Hymenoptera 7species, Hemiptera 6species, Dermaptera 1 species were investigated. Among them high frequency and population density were Chilocorus rubidus, Harmonia axyridis of Coleoptera, Brachyponera chinensis, Vesp~ilac rabro flavofasciata of Hymonoptea, Sphedanolestes impressicollis, Velinos nodipes of Hemiptera. Anatis halonis, Anisostictu kobensis of Coleoptea and Cydnocoris russatus of Hemiptea were newly investigated. In spiders, Araneidae gspecies, Thomisidae Sspecies, Lycosidae 3species, Salticidae 3species, Pisauridae 2species, Theridiidae 2species, Tetragnathidae 2species, Oxyopidae lspecies, Gnaphosidae I species, Clubionidae I species, Atypidae 1 species were investigated. Which high frequency and concentrating predatory species were Argiope bruennichii, Araneus ventricosus, Neoscona melloteei, Neoscona scylloides of Araneidae, Lycosa suzurii, Pirata sp. of Lycosidae, Marpissu elongata of Salticidae, Dolomedes stellatus of Pisauridae, Oxyopes sertatus of Oxyopidae. Neosconu scylloides, Cvclosa laticauda of Araneidae, Synema globosum, Xysticus ephippiatus, Misumenops tricu~pidat~o~f .T~h, omisidae, Marpissa elongata, Dendryphantes atratus of Salitidae, Perenethis .fascigera of Pisauridae, Tetragnatha pinicola of Tetragnathidae, Zelotes asiaticus of Gnaphosidae.

• Korean journal of applied entomology
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• v.58 no.4
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• pp.313-317
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• 2019

Stink bugs (Hemiptera: Pentatomidae) are economically important pests of fruit trees in Korea. The aim of the present study was to survey the relative abundance of stink bugs on four stone fruits, maesil (Prunus mume Sieb. et Zucc), cherry (Prunus avium L.), plum (Prunus salicina Lindl), and peach (Prunus persica (L.) Batsch), from 2017 to 2019 in the field. Four stink bug species were observed, including Carbula putoni (Jakovlev), Dolycoris baccarum (L.), Halyomorpha halys (Stål), Plautia stali Scott. H. halys was the most abundant (65%), followed by P. stali (26%), C. putoni (7%), and D. baccarum (2%). H. halys was the dominant species in maesil, cherry, and peach fruits, whereas P. stali was the dominant species in plum fruits. Most (81%) of the stink bugs observed were adults, with nymphs accounting for only 19% of the observed specimens. More stink bugs were observed during the late season than during the early season. These finding suggest that control strategies should be developed for the management of H. halys and P. stali at harvest in stone fruit tree orchards in Korea.

• Proceedings of the Korean Society of Crop Science Conference
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• 2000.11a
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• pp.195-197
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• 2000

• Korean journal of applied entomology
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• v.25 no.2 s.67
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• pp.107-112
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• 1986

Species of pathogens and insects associated with grain discoloration in the Philippines were indentified. Leptocorisa oratorios was the most dominant insect species causing discoloration. Pathogenicity tests of fungal organisms isolated from discolored grains showed that Drechslera oryzae, Curvularia lunata, Trichoconiella padwickii, Sarocladium oryzae, Alternaria tenuis, and Fusarium solani were the common pathogens responsible for 'dirty panicle' disease of rice. Discoloration incidence was higher on treatment when both pests were present than when they occurred singly. The discoloration severity was attributed to the pathogens whereas rice bug caused a high decrease in grain weight and unfilled grains. Rice bug feeding on grains enhances the infection caused by the pathogen. Due to this, the quantity and quality of grains produced were affected, resulting in yield reduction.

• Korean journal of applied entomology
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• v.52 no.4
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• pp.437-448
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• 2013

Hemipteran bugs, which were previously considered as secondary pests, have currently become important pests of numerous crops. Among them, Riptortus pedestris (Fabricius) is a major species that occurs in Korea, Japan, China, and South Asian countries. Riptortus pedestris infests leguminous crops like soybean, vetches, and red clover; fruit trees like persimmon and yuju; and grains like barley, foxtail millet, broomcorn, and sorghum. Riptortus pedestris causes the greatest damage to soybean, as it is the most suitable host for the bug. Feeding damage during pod formation significantly reduces the yield of soybean. Currently, 17 insecticides, including diazinon and etofenprox, are registered for the control of hemipteran bugs in Korea, and growers apply insecticides two to three times on a regular basis. Aggregation pheromone traps are widely used as a monitoring tool and partial control measure. The aggregation pheromone of R. pedestris attracts conspecific adults and nymphs and is used for food exploitation rather than sexual attraction. In addition, the pheromone serves as a kairomone for egg parasitoids such as Gryon japonicum (Ashmead) and Ooencyrtus nezarae Ishii. As a new method of pest management, nonviable host eggs were included in the pheromone trap to catch R. pedestris and propagate parasitoids. As a part of cultural practices, resistant soybean varieties with specific color and size of pod and control of flowering time through the alteration of planting date can be used. For the effective management of R. pedestris in the near future, development of cultural practices that can support natural control factors and the use of multiple control tactics are needed.

• Korean journal of applied entomology
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• v.31 no.4
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• pp.509-515
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• 1992

Phytophagous insects were surveyed from field populations of Compositae weeds in the order Campanulales. Forty five insect species including unidentified ones of 43 genera in 5 orders and 17 families were recorded from 16 species in 12 genera of Compositae weeds. The hemipterans and coleopterans were the most abundant insects representing 13 and 13 species, repectively. Aphids and leaf beetles were important phytophagous insects on Compositae weeds. The potential biological control insects were Uromelan gobonis and Aethes cnicana on Cirsium japonicum var. ussuriensis and Cryptosiphum artemisiae on Artemisia lavandulaefolia. The leaf beetles, Chrysolina aurichalcea, Longitarsus succineus, Basilepta fulvipes, and Hamushia konishii were often collected from A. lavandulaefolia. Aphids and leaf beetles showed host specificities. The roles of hemipterans collected from the flowers of A. lavandulaefolia and Erigeron canadensis were questionable.

• Korean journal of applied entomology
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• v.49 no.2
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• pp.123-127
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• 2010

Attractiveness of different amounts of methyl (E,E,Z)-2,4,6-decatrienoate, the aggregation pheromone of brown-winged stink bug, Plautia stali (Hemiptera: Pentatomidae), was tested using different kinds of dispensers. A lure filled with hexane was used as a control treatment. There were no differences in the attractiveness of the pheromone to P. stali and Halyomorpha halys among dispensers (polyethylene-vial, rubber septum, and polyethylene tube). Traps baited with 7, 20, 40, 50, and 60 mg of pheromone were tested for their attractiveness. For females, the 40 mg trap attracted highest number of P. stali, even though there were no significant differences among pheromone amounts. For males, the 40 and 50 mg traps attracted significantly more bugs than the 7, 20, and 60 mg traps and the control traps. Based on these results, the pheromone dispenser impregnated with 40 mg of pheromone will be practical in monitoring P. stali in the field.

• Korean journal of applied entomology
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• v.41 no.4
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• pp.233-238
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• 2002

The seasonal occurrence trends of the brown-winged green bug, Plautia stali, and the brown malmorated stink bug, Halyomorpha halys, were monitored in sweet persimmon orchards in southern region of Korea using light traps (in 2000 and 2001), and aggregation pheromone traps (methyl (E, E, Z)-2 ,4, 6-decatrienoate)) of P. stali (in 2001). Light trap data showed that H. halys started to occur from the end of June, and reached its peak in early or mid August, while P. stali was mostly attracted to the traps from mid July to late August without any distinct attraction peak. Both species did not occur after September in the persimmon orchards studied. The attraction patterns of both species to aggregation pheromone traps were different from those observed in light traps. Both species were attracted to the pheromone traps from mid May to late August. The peak occurrence of H. halys could not be detected due to low catches. However, the period of peak attraction for P. stali was from late June to late August depending on the geographical locations. The aggregation pheromone traps of P. stali attracted more number of P stali than H. hails, but the light traps showed a reverse pattern. In both species, more females were attracted to the aggregation pheromone traps than males. The difference of attraction patterns between 2 types of traps was discussed in relation to content of soluble tannin in persimmon fruits.

• Korean journal of applied entomology
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• v.48 no.1
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• pp.37-44
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• 2009

This study was carried out to survey the occurrence of stink bugs and pecky rice grain caused by the stink bugs in paddy fields in six districts of Gyeonggi-do. In the levee of the paddy fields, 30 species of the stink bugs were collected, and the dominant species were Paromius exiguus in Hwaseong and Siheung, and Stenotus rubrovittatus in Pyeongtaek, Icheon and Paju. In the paddy fields, 23 species were collected, and the dominant species were Paromius exiguus in Siheung, and Stenotus rubrovittatus in Pyeongtaek, Icheon and Paju. P. exiguus overwintered and proliferated mainly in the west coastal region, where its host plants, Imperata cylindrica and Calamagrostis epigeois, were abundant, and then moved to paddy fields later in the season, resulting in the peak density in September in paddy area. Stenotus rubrovittatus and Cletus punctiger were abundant in paddy area in August and September, and Eysarcoris aeneus was abundant in June and July. When the stink bugs were inoculated on the rice, the rate of pecky rice caused by E. aeneus and P. exiguus at milk ripe stage was 10.2% and 4.8%, respectively, and the rate by S. rubrovittatus and P. exiguus at dough ripe stage was 4.3% and 2.7%, respectively. The damage shape of pecky rice was distinctive according to the species. The surface of pecky rice by P. exiguus was very smooth but the surface of pecky rice by E. aeneus was rough and caved. In the pecky rice by S. rubrovittatus, the spot occurred at the topside of the grain.

• Proceedings of the Korean Society of Crop Science Conference
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• 1998.04a
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• pp.183-184
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• 1998