• Animal Systematics, Evolution and Diversity
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• v.11 no.4
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• pp.485-495
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• 1995

A cladistic analysis is conducted to establish the phylogenetic relationship of the 6 genera in the Errhomenini , and 2 monophyletic groups are represented as the result.

• Korean Journal of Agricultural Science
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• v.46 no.3
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• pp.683-687
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• 2019

The leafhopper genus Batracomorphus Lewis, 1834 belongs to the tribe Batracomorphini (Hemiptera: Auchenorrhyncha: Cicadellidae: Iassinae). B. irroratus Lewis, 1834 was designated as its type species. The genus includes most diverse species in the subfamily Iassinae and contains approximately 350 described species from the world. In Korea, four Batracomorphus species, B. allioni (Turton, 1802), B. punctilliger Anufriev, 1981, B. stigmaticus (Matsumura, 1912), B. viridulus (Melichar, 1902), have been reported in the Korean peninsula. The members of this genus have a similar body size and similar general appearances; thus, it is very difficult to identify clearly without examining the male's genital structures. In this study, Batracomorphus furcatus Li and Wang, 2003 is newly reported from Korea for the first time. This species is previously known to be from China. Herein, the morphological information of B. furcatus Li and Wang is provided with a re-description, photographs of the male dorsal habitus, illustrations of the genitalia structure and distributional records. In addition, a key to the Korean five species of Batracomorphus is presented.

• Korean journal of applied entomology
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• v.35 no.1
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• pp.7-14
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• 1996

A morphometric analysis is used to clarify the interspecific relationship between 4 species of the subgenus Parapagaronia in Pagaronia. The quantitative distinctions are confirmed at 87.5% of correct assignment in male and 96.25% in female.

• Korean journal of applied entomology
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• v.19 no.3 s.44
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• pp.149-152
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• 1980

The paper contains descriptions of three new species: Pagaronia kumsanensis sp.n., P. heuksanensis sp. n., and P. hamatus sp.n. from Korea. Figures of male genitalia and female seventh sternum are given for all species.

• Korean journal of applied entomology
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• v.20 no.3 s.48
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• pp.151-154
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• 1981

The paper contains descriptions of three new species from Korea: Planaphrodes bella spn.1 Xestocephalus cognatus sp. n. and Watanabella graminea sp. n. Figures of external characters and male genitalia are given for all species.

• Korean journal of applied entomology
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• v.54 no.1
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• pp.47-50
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• 2015

Two newly recorded species of the genus Arboridia Zachvatkin (Hemiptera: Auchenorrhyncha: Cicadellidae: Typhlocybinae) from Korea are reported, which are Arboridia lunula Song & Li, 2013 and Arboridia agrillacea (Anufriev, 1969). Photographs of dorsal habitus, illustrations of male genitalia, abdomens and forewings and distributional records are provided. In addition, a key to the Korean Arboridia species is also given.

• Korean journal of applied entomology
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• v.44 no.3 s.140
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• pp.251-255
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• 2005

The occurrence and the host plants of Arboridia kakogawana and A. maculifrons in the province of Chungcheonbuk-Do were observed. They started to infest grapevine in a vineyard in early May and reached peak population two times once in late June and once in mid August in general. In preparation for overwinter, A. kakogawana moved to the nearby forest in search of a tree with bark from early October. A. maculifrons also moved to the weeds on the ridge of vineyard circumferences from the end of September. Population density of the two species were found to be the highest in Okcheon county among the five counties of Chungbuk province. Developmental period of A. kakogawana was shorter than that of A. maculifrons.

• Korean journal of applied entomology
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• v.48 no.2
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• pp.165-170
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• 2009

This study was conducted to investigate specific stages and distribution of overwintering nymphs of green rice leafhopper, Nephotettix cincticeps by measuring head capsule width. The nymphal head capsule width of the 1st instar to the 5th instar was 0.381, 0.502, 0.673, 0.979 and 1.128 mm, respectively. lts coefficient variation was 5.3, 4.0, 3.0, 4.5 and 5.3%, respectively. Growth ratio of each instar was not significantly different among 2nd to 4th instars as 1.31 to 1.34, but for the 5th instar it decreased as 1.28. The logarithm of the nymphal head capsule width was regressed as a function of the stage number of insects, resulting in LogY = 1.4627 + 0.1192X ($r^2= 0.9993$). Also fitness to the Dyar's law for the nymphal head capsule width of each instar was 98% or over and the Dyar's constant (K) was 1.316. The occurrence of N. cincticeps was maximum at the end of January with 195 individuals/0.25 $m^2$. The most abundant instar in the overwintering N. cincticeps population was 4th instar accounting for over 90%. Population of the 5th instar began to increase from mid-March, and adults began to occur in early April.

• Korean journal of applied entomology
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• v.58 no.2
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• pp.143-149
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• 2019

This study was conducted to examine the attractiveness of yellow sticky trap (YST) for insect pests by the angle of inclination of the trap surface. In strawberry farms with high bed system, YSTs were installed to attract insect pests in vertical direction with one surface, horizontal direction with upper and under surface, and angle of $45^{\circ}$ with upper and lower sticky surface. Thrips (Frankliniella occidentalis in dominance) and Sciaridae (Bradysia agrestis in dominance) species were more attracted on upper surface of $45^{\circ}$ angle trap, vertical surface and upper surface of horizontal trap than on lower surface of $45^{\circ}$ angle trap or horizontal trap. Cicadellidae (Empoasca vitis in dominance) species were caught more on vertical surface and upper surface of $45^{\circ}$ angle trap than on other traps. There were no specific trend in capture of aphid (Aphis gossypii in dominance) and white fly (Trialeurodes packardi in dominance) species among traps, probably because of a low density of the pest species.

• Korean Journal of Environment and Ecology
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• v.23 no.5
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• pp.411-417
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• 2009

This research is intended to discover physiological and biochemical defense mechanisms against herbivores of 8 species of the genus Acerby examining the morphological characteristics of the leaf, the structure and number of leaf domatia, herbivores insects and mites feeding on leaves, which were collected from the trees growing in Mt. Chiak, Mt. Cheongtae, Mt. Jungwang, Mt. Bangtae, Mt. Taebaek and Wonju City. This research was conducted from May through July, 2009, and the results are as follows. The domatia of A. pseudosieboldianum, A. pictum subsp. mono and A. mandshuricum belongs to tuft type; that of A. palmatum, A. triflorum and A. tschonoskii pocket+tuft type; and that of A. tegmentosum pocket type. The number of domatia per leaf turned out to be the highest in the case of A. tegmentosum(20.2), and the lowest in the case of A. ginnala (4.2). Leaf surface trichomes of A. palmatum, A. pseudosiebotdianum, A. ginnala and A. mandshuricum are covered with villi; those of A. pictum subsp. mono and A. triflorum with soft, pilose type of hair, and those of A. tschonoskii with stiff, strigose hair. The trichome density of lower leaf surface is found to be higher than that of the upper leaf surface. Only in the case of A. palmatum, A. pseudosieboldianum, A. tegmentosum and A. tschonoskii, a small amount of nectar is found to be secreted from the distal vein parts of the leaf margin. The number of mites on each leaf are found to be significantly different among tree species, and average mites number per leaf was the highest in the case of A. tschonoskii (9.2/leaf), and A. mandshuricum, A. pseudosieboldianum, and A. triflorum follow it in decreasing order. Minute insects attacking the leaf of Acer spp. include Periphyllus californiensis, P. viridis, Psylla spp, and gall mites, and the number of these insects are found in Periphyllus californiensis, Psylla spp, P. viridis, and Cicadellidae sp. in decreasing order. The natural enemies of these herbivores insects are predatory mites, such as Chilocorus rubidus, Coccinella septempunctata and the nymph, Aphidius ervi, Poecilocoris lewisi and its larva, and Poecilocoris lewisi. Lasius japonicus and Formica japonica are symbiotic with aphids, and supports herbivores. Finally, our research confirmed that predatory mites attack Periphyllus californiensis and suck the body fluid of their victim. This proves that mites form a symbiotic relationship with plants through the mediation of leaf domatia. This also indicates that a protective mutualism may be more conspicuous in temperate broad-leaved trees.