• Korean journal of applied entomology
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• v.32 no.4
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• pp.414-419
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• 1993

Species and seasonal occurrences of Sencinae, Melolonthinae and Rutelinae chafers captured b by blacklight traps were investigated from 1989 to 1991 in Suwon and Chonju. Numbers of s species captured in Suwon and Chonju were 6 and 6 for Sericinae, 8 and 7 for Melolothinae, 7 a and 8 for Rutelinae, 21 and 21 in total, respectively. Species with more captures from both districts in each subfamily were Maladera orientalis of Sericinae, Holotrichia morosa and H. diomphalia of Melolonthinae, and Anomala corpulenta, and A. rufocuprea of Rutelinae. Adults of t the above five species were captured 1O~20 days earlier in Chonju than in Suwon. H. d diomphalia adults occurred mamly In odd years in Chonju, which is the same pattern as in S Suwon.

• Korean journal of applied entomology
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• v.31 no.4
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• pp.486-491
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• 1992

The aboveground activities of the larger black chafer (Holotrichia morosa Waterhouse) and the Korean black chafer (H. diomphalia Bates) adults were investigated in the field and laboratory from 1991 through 1992. In a field cage, H. morosa adults emerged from the ground between 7 : 40-9 : 00 p.m. and H. diomphalia adults emerged between 7 : 30-10 : 00 p.m. After emergence, both females and males flied actively for less than one minute in H. morosa, while males flied inactively and females did not fly at all in H. diomphalia. Once emerged, adults of the two species mated or fed on plant leaves and seemed to stay aboveground till dawn. H. mOTOsa adults were attracted to a blacklight trap mainly between 8 : 10-10 : 00 p.m. in the field. H. morosa males and females emerged from soil every other day in a glass cistern.

• Korean journal of applied entomology
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• v.61 no.4
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• pp.601-604
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• 2022

The tribe Rhyparini is one of the well-known termitophilous tribes in Aphodiinae. The genus Rhyparus has the largest number of species in the tribe Rhyparini, and only one species, Rhyparus azumai Nakane, 1956 was recorded in Korea. In this study, we report Rhyparus helophoroides Fairmaire, 1893 from Korea for the first time. Diagnosis, photographs of diagnostic characters, key to the Korean Rhyparus, and brief ecological information of the species are provided.

• The Korean Journal of Soil Zoology
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• v.6 no.1_2
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• pp.37-44
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• 2001

Scarabaeids and white grubs were investigated at Halla arboretum and nursery in Jeju province in 1999 and 2001. Scarabaeid pests were surveyed from 14 tree species of 12 families at Halla arboretum in Jeju in March, 1999 and from 55 species of 27 families in March and September, 2001 and from Taxus cuspidata at nursery in Seoguipo in March, 1999 and 18 tree species of 9 families at the same nursery in March and September, 2001. Six species of white grubs and scarabaeids were collected from Halla arboretum. At Halla arboretum, Holotrichia niponensis was collected from 28 tree species of 21 families, H. diomphalia from 27 tree species of 20 families, and an unidentified white grub from 27 tree species of 19 families. Maladera orientalis was collected from 4 tree species of 4 families and Aphodius sp. and Adoretus tenuimaculatus from Punica granatum and Carpinus sieboldiana. At Halla nursery in Seoguipo, H. niponensis were collected from 9 tree species of 6 families and H. diomphalia from 10 tree species of 6 families. White grub of Minela testaceopes was collected from Ternsstraemia japonica. H. niponensis, H. diomphalia and an unidentified white grub were dominant species out of collected white grubs and scarabaeids and these were collected from Cinamomum camphrora. H. niponensis was the most serious pest on T. cuspidata.

• Korean journal of applied entomology
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• v.29 no.4
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• pp.222-229
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• 1990

The flight activities of Holotrichia morosa Watershouse and H. diomphaia Bates adults were monitored by blacklight traps for six years from 1984 to 1989. The flight activity of H. morosa adults was most prominent from late June to early August with a peak flight in mid July, and that of H. diomphalia adults mainly occurred from early May to late June of odd years with the peak flight dates varying year by year. The flight activities of the two species during the fight period became vigorous after moderate to heavy rainfalls. The overwintered adults of H. diomphalia seemed to begin flying when the daily mean temperature rose above $15^{\circ}C$. The ratios of the females to the total adults collected by the blacklight traps were 53.3% for H. morosa and 0% for H. diomphalia, although the female sex ratio of the latter species was 57.4% in the field.

• Korean journal of applied entomology
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• v.27 no.4
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• pp.194-199
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• 1988

The seasonal movements of Holotrichia morosa and H. diomphalia in soil were investigated during the period from 1984 to 1986 in Suwon. Most cf the eggs, active larvae and adults of the two species could be found at the soil depth of I-IDem. The larvae began downward movement in late October and early November in order for overwintering when soil tempe¬rature at 5cm below ground reached about $10^{\circ}C$. The overwintering depths of the larvae were 10-40cm for H. morosa and 30-80cm for H. diomPhalia. After the overwintering, pupation and adult emergence of H. morosa occurred at the overwintered sites, \vhereas H. diomPhalia larvae returned to near soil surface next April, and resumed feeding. H.diomphalia larvae began to move downward again in late June for pupation and adult emergence, and overwintered thereafter as adults at the depth of 1O-40cm.

• Korean journal of applied entomology
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• v.24 no.4 s.65
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• pp.179-182
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• 1986

The white grubs were collected from ginseng field and fallow lands to examine their external morphology and species components. They were divided into 3 subfamilies, i.e., Melolonthinae, Rutellinae, and Sericinae by the shape of anal slit and/or presence of elevated lines in stridulating area of mandible. Eight species were identified by means of comparing the shape of anal slit, setal arrangement of decasternite, and frontoepicranial series of setae. Larvae of Holotrichia diomphalia and H. morosa were observed to damage ginseng root in field.

• Korean journal of applied entomology
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• v.41 no.3
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• pp.183-189
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• 2002

Occurrence of scarabs at sweet persimmon (Diospyros kaki var. Fuyu) orchards was investigated by mercury light traps every one week interval in several areas in Gyeongnam province including, Jinju, Sacheon, Sancheong, and Gimhae, from April to September in 2000 and 2001. In addition, damage of persimmon by scarabs was observed every ten days interval at three orchards in Jinju and at one in Gimhae from late May to late October. Although sixteen species of 12 genera were attracted to the traps, species and number of catches were different according to orchards and years. Holotrichia morosa was most dominant in Jinju, Sacheon, and Sancheong. Total number of scarabs attracted to the traps was highest at the orchard surrounded by chestnut orchards in Sancheong. Fruits of sweet persimmon were not damaged by scarabs at the studied orchards. However, leaves and calyxes were slightly damaged by Adoretus tenuimaculatus. Maximum average numbers of the damaged leaves and calyxes throughout the year by A. tenuimaculatus were 0.33 leaves from 10 new shoots and 0.07 calyxes from 15 fruits. Gametis jucunda and Popillia mutans damaged flowers and calyxes. Maximum average numbers of damaged flowers and calyxes by these 2 species were the same as 0.03 from 15 flowers and 15 calyxes, respectively. These levels of damage suggest that the scarabs are not economically injurious to sweet persimmon fruits in Korea.

• Korean journal of applied entomology
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• v.30 no.4
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• pp.265-270
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• 1991

Oviposition activities of the larger black chafer(HolotTichia mOTosa Waterhouse) and Korean black chafer(H. diomphalia Bates) were examined in the laboratory and field from 1985 to 1990. In H. mOTosa and H. diomphalia, total durations of oviposition were 31.70$\pm$17.33 days and 61.17$\pm$23.15 days, numbers of days of actual oviposition were 9.00$\pm$5.03 days and 22.33 $\pm$11.72 days, total numbers of eggs laid laid per female were 23.43$\pm$16.26 and 65.67$\pm$37.97, and numbers of eggs laid per female per day were 2.60$\pm$2.50 and 2.94$\pm$2.34, under laboratory conditions. Difference of total numbers of eggs per female between both species seemed to be due mainly to numbers of days of actual oviposition. Oviposition period under laboratory conditions was considerably delayed behind that in the field in H. morosa but the two oviposition periods were almost overlapped in H. diomphalia. In the field, rates of gravid females of H. diomphalia were obviously higher than those of H. mOTosa, but numbers of eggs per gravid female were almost same in the two species, H. diomphalia adults did not show marked oviposition and feeding preference among several species of weed plants in the insect net chamber.

• Korean journal of applied entomology
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• v.59 no.1
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• pp.37-40
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• 2020

We recognized Pachyserica yanoi Nomura which belongs to the genus Pachyserica Brenske, 1897 (Coleoptera, Melolonthidae) in Korea for the first time. A key to the genera of Korean Sericini, diagnosis and photographs of this species are provided.