• Korean journal of applied entomology
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• v.28 no.1
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• pp.28-31
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• 1989

Lariophagus distinguendus,an ectoparasitoid of rice weevil, laid its eggs exclusively on the third and fourth larvae, with the preference for the fourth larva. The sex ratio of the pa¬rasitoid can be regulated by the female parasitoid on the basis of the host size available at the time of oviposition.

• Korean journal of applied entomology
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• v.42 no.2
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• pp.133-138
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• 2003

To establish the successive rearing of red-striped golden stink bug, Poecilocoris lewisi Distant, developmental characteristics, host plant and oviposition preference were investigated. Raw peanuts were supplied to the insect as a substitute food at 25$\pm$$1^{\circ}C$, 60$\pm$5% R.H. and under 16Lㆍ8D photo regimen. Total developmental period was 48 days: 8.2$\pm$0.4, 5.4$\pm$0.2, 8. $\pm$0.5, 6.4$\pm$0.4, 7.4$\pm$0.3 and 12.6$\pm$0.8 days for egg, first though fifth instar, respectively. The instar survival rate was 57.1% and the sex ratio was estimated to be 53 : 47 (male : female). Adult longevity was on the average 30.8 in male and 35.4 days in female, respectively. Egg of P. lewisi was globular ($\phi$1.8-1.9mm) with milky white in color The number of eggs oviposited per clutch was mostly 14. Pre-oviposition period was 25.8 days and mean frequencies of oviposition were 4.4. Female preferred to oviposit on the host plant when available, but oviposited on the artificial leaf successively when the host is not around. On the other hand P. lewisi preferred to suck the nectar of stem or fruit of Phellodendron amurense Ruprecht, Zanthoxylum schinifolium Siebold et zuccarini, Cornus officinalis Siebold et zuccarini and Cornus controversa Hemsley among the 18 plant species tested.

• Korean journal of applied entomology
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• v.60 no.3
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• pp.277-286
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• 2021

The natural enemy was identified as a parasitic wasp, Binodoxys communis Gahan. B. communis taxonomically belongs to the family braconidae, subfamily aphidinae, and genera binodoxys. It develops normally at 17.5 to 32.5℃, and not at 35℃. Depending on the temperature, the longest development period of B. communis was 21.9 days at 17.5℃, and shortest was 6.46 days at 32.5℃. The effective accumulated temperature was 175.44 DD for females as well as males; however, the developmental threshold temperature was 10.87℃ and 10.74℃ for females and males, respectively. This parasitic wasp was found to prefer cotton aphids and soybean aphids as its prey.

• The Korean Journal of Soil Zoology
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• v.6 no.1_2
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• pp.17-20
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• 2001

The preference ratio of spider mites (Tetranychus urticae and T. kanrawai) on the chrysanthemum, Gypsophila paniculata, Carnation and Rose was high, but Lilium, Calla, Startis and Gladiolus was low. Field adaptability of Tetranychus kanzawai on the chrysanthemum variety was high in Yellowment variety but low in five other varieties. That of T. urticae line was high on 9818-1, 9819-5, 9820-6 chrysanthemum lines but low on other six lines . Preference ratio of T. urticae was 82.8% higher on upper than on lower surfaces in the field.

• Korean journal of applied entomology
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• v.51 no.1
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• pp.33-37
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• 2012

This study was conducted to investigate food preference and developmental characteristics of the gray field slug, $Deroceras$ $reticulatum$ M$\ddot{u}$ller (Stylommatophora: Limacidae) using various foods. The food preference of $D.$ $reticulatum$ was most highest on Chinese cabbage ($Brassica$ $campestris$ L., followed on cucumber ($Cucumis$ $sativus$ L.), and significantly low on beet ($Beta$ $vulgaris$ var. Ruba), kale($Brassica$ $oleracea$ L. var. $acephala$ D.C), carrot (Daucus carota L.) and Chinese cabbage ($Brassica$ $campestris$ L.) which were not different significantly. The total number of eggs laid by $D.$ $reticulatum$ was the highest (n = 109.6) on cucumber and the lowest (n = 10.1) on leaf perilla ($Perilla$ $frutescens$ var. $japonica$ Hara). Hatchability was the highest (92.4%) on cucumber and the lowest (62.5%) on leaf perilla. The egg developmental period was not significantly different from 12 days to 13 days among host plants. Juvenile period and adult longevity ranged from 75 days to 111 days and 66 days to 187 days, respectively. Thereby, life span from egg to adult longevity of $D.$ $reticulatum$ was the longest on cucumber with 273 days and the shortest on 190 days on leaf perilla.

• Korean journal of applied entomology
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• v.15 no.4 s.29
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• pp.179-184
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• 1976

Laboratory experiments were conducted to clarity the early-spline host·selectivity by the small brown planthopper(SBPH), Laodelphax striatellus Fallen, and green rice Leafhopper(GLH), Nephotettix cincticeps Uhle., on the bailey (the variety Suweon #18) and water foxtail (Alopeculus aequadis Sosbol). The host selectivity was evaluated on the bases of feeding and ovipositional perferences of the insects on the plants and their biological effects on the plants. The nymphs of SBPH much more preferred barley for feeding than water forxtail, while the nymphs of GLH relatively prefered water foxtail. There was no significant difference in ovipositional preference by SBPH among the test plants, and ovipositional preference by GLH Ivas significantly lower on barley and water foxtail than on rice. Nymphal growth an4 adult emergence of SBPH were significantly faster and higher on barley than on water foxtail. No adult emergence of GLH was observed on barley, and adult emergence was still quite lower even on water foxtail. The adult of SBPH fed on barley showed longer longevity aad higher fecundity than that of SBPH from water foxtail and rice. The adult GLH fed ell water foxtail shorted relatively shorter longevity and to)ver fecundity than that of GLH on rice. In conculsion, barley seems to be more adequate for spring host of SBPH than water foxtail, but barley may not be quite adequate for spring host of GLH. At presont moment, GLH seems rather to primarily select the water foxtail than barley as a spring host, even if the water foxtail is not so adequate for development of GLH.

• Korean journal of applied entomology
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• v.52 no.4
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• pp.371-377
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• 2013

Occurrence of adult alfalfa weevil, Hypera postica Gyllenhal, was observed at Chinese milk vetch field, and host plant preference of its $1^{st}$ generation adult was observed at greenhouse and Chinese milk vetch field. The over-wintered adult of the weevil appeared from late March and peaked in mid April while the $1^{st}$ generation adult appeared from late April and peaked in late May. However, the occurrence of over-wintered adult was very low contrary to the $1^{st}$ generation adult which was very high with some variations among observed years. In greenhouse, host plant preference of $1^{st}$ adult generation of H. postica was evaluated with 11 different seedlings. H. postica was found to occur in significantly higher number on Chinese cabbage seedling followed by soybean, and kale at 7 days after releasing(DAR). Corn, crown daisy and sorghum were found to be the least preferred with nil occurrence of the weevil. Seedlings damage rate by H. postica feeding at 7DAR was the most severe on Chinese cabbage(60.0%) followed by soybean(50.0%), kale(30.0%), foxtail millet(16.7%), proso millet(13.3%) and lettuce(3.3%) significantly. Also, seedlings damage rate by H. postica at 7DAR in Chinese milk vetch field had shown the similar trend with Chinese cabbage(46.7%), soybean(43.3%), kale(23.3%), foxtail millet(13.3%) and proso millet(13.3%) in greenhouse significantly. Accordingly, results on host plant preference of H. postica from this study can be used as a basic information for safe cultivation of upland crops at near or around green manure crop field.

• Korean journal of applied entomology
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• v.42 no.4
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• pp.301-305
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• 2003

This study investigated the ecological characteristics of Frankliniella occidentalis on four horticultural crops. On red pepper leaves, larval developmental period and survival rate of F. occidentalis were 6.4 days and 67%, respectively. While adult female lived longer on cucumber leaves as long as 16 days, on Petal lived 8.1 days. F. occidentalis adult female preferred tomato to eggplant, cucumber and red pepper, and higher number of hatched larva were from leaves of middle part of egg-plant compared with those from other parts. F. occidentalis adult female fed preferably on petal compared with leaves and Petals of eggplant, and among petals of four tested plants, the most preference was those of red pepper.

• Korean journal of applied entomology
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• v.32 no.3
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• pp.338-347
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• 1993

The study was to investigate the bionomics, host plants, and oviposition preference of Hishimonus sellatus Uhler. It has 5 generations under natural conditions and the peak of the 3rd generation was observed about mid and late August. Its average developmental durations were 80 days in spring, 69 days in summer, and 77.8 days in autumn. The lengths of each stage were 0.8mm in eggs, 0.9mm in 1st instar, 1.4mm in 2nd instar, 2.1mm in 3rd instar, 2.5mm in 4th instar, 3.2mm in 5th instar, 4.1mm in female, and 3.8mm in male. Hishimonus sellatus overwintered as egg in Morus alba, Humulus japonicus, and Zizyphus jujuba begining mid October, and attacked the shoot of M. alba and H. japonicus about mid and late May, migrated to the Zizyphus jujuba from late June to early July. Female oviposites 32~62 eggs into epidermis of shoot, vagina and vein during their life. The preferred host plants of H. sellatus were Humulus japonicus, Morus alba, Zizyphus jujuba, and ligustrum obtusifolium. Highly preferable oviposition site was H. japonicus, M. albal, Z. jujuba, and L. obtusifolium, etc. On audlt longevity, the host plants as H. japonicus, M. alba, and Z. jujuba were 43$\pm$2 days and A. brevipedenculata, C. mimosoides, L. obtusifolium, V. rosa, A. sinicus and, A. graveolens were more than 25 days, and other host plants were less than 20 days.

• Korean journal of applied entomology
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• v.43 no.1
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• pp.21-26
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• 2004

These studies were carried out to investigate the oviposition and host feeding characteristics of Neochrysocharis formosa Westwood, an endoparasitoid of Liriomyza trifolii. N. formosa female oviposited inside the abdomen at the rear end of the host larva. Number of eggs and host feeding per day of N. formosa tended to increase as temperatures go up. The ratio of oviposition and host feeding of N. formosa were 0.5, 0.9, 1.0 and 1.0 at 15, 20, 25, and 30$^{\circ}C$, respectively. In 25$^{\circ}C$, number of eggs and host feeding were 176.0 and 188.7, respectively, and aduly female longevity was 11.8 days. N. formosa female preferred to the 3rd rather than 1st and 2nd larva for oviposition and host feeding.