• Title, Summary, Keyword: 담배거세미나방

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Control Thresholds for Managing Common Cutworm, Spodoptera litura (Fabricius) (Lepidoptera: Noctuidae) on Chinese Cabbage (배추에서 담배거세미나방(Spodoptera litura)의 요방제 수준 설정)

  • Choi, Duck-Soo;Kim, Do-Ik;Kim, Seon-Gon;Ko, Suk-Ju;Kang, Beom-Ryong;Kim, Sang-Soo
    • Korean journal of applied entomology
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    • v.50 no.3
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    • pp.215-220
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    • 2011
  • This study aimed to estimate control thresholds for managing common cutworm, Spodoptera litura Faricius (Lepidoptera: Noctuidae) at different larval densities and growth stages of Chinese cabbage in field conditions. The percent yield reduction (Y) of Chinese cabbage infested by different densities of S. litura (X, no. of larvae/100 plants) for three weeks were estimated by Y=-21.85X+1300 (R2=0.997) 5 days after transplanting and Y=-12.1X+1382 (R2=0.998) 20 days after transplanting. Based on the relationships between the densities of S. litura larvae and the yield index of chinese cabbage, the number of larvae (2nd to 3rd instar) which caused 5% loss of yield was estimated as 2.9/100 plants 5 days after transplanting, and 5.6/100 plants 20 days after transplanting.

Control Effects of different Concentrations and Mixtures of the commercial Bacillus thuringiensis Products against Moths (Bacillus thuringiensis 제품의 농도 및 혼합 조건에 따른 나방류 방제 효과)

  • Kim, Jeong Jun;Zhu, Hong;Han, Ji Hee;Lee, Sangyeob;Park, Hong-Hyun;Lee, Sang Guei
    • The Korean Journal of Pesticide Science
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    • v.16 no.4
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    • pp.387-390
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    • 2012
  • Beet armyworm (Spodoptera exigua), diamondback moth (Plutella xylostella) and tobacco cutworm (S. litura) are insect pests causing damage in many economically important vegetables in Korea. Bacillus thuringiensis, commonly known as Bt, has been available as an alternative insecticide for many years. Five commercial Bt products and the mixtures evaluate the control efficacy against three kinds of moths. These commercial Bt products had high control efficacy against $2^{nd}$ instar of diamondback moth, but didn't show high mortality against beet armyworm and tobacco cutworm. Mixtures of Bt products didn't have synergistic effects to the tested moths. Also application of twice and four times the recommended concentration didn't improve the control effects against the tested three species of moths.

Insecticidal activity of thiodicarb on lepidopterous pests (나방류에 대한 thiodicarb의 살충활성)

  • Choi, Yu-Mi;Kim, Gil-Hah
    • The Korean Journal of Pesticide Science
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    • v.8 no.1
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    • pp.16-21
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    • 2004
  • A series of experiments was conducted to determine the toxicities of thiodicarb on the six lepidopterous pests (Pseudaletia separata, Plutella xylostella, Palpita indica, Spodoptera exigua, Helicoverpa assulta, Spodoptera litura) and to elucidate factors insecticidal effects mechanism of thiodicarb. Thiodicarb was very effective against six lepidopterous young larvae, but less effective to the old larvae and it acted slowly. Thiodicarb inhibited acetylcholinesterase and glutathione S-transferase activities, but not inhibit esterase activity.

Pathogenicity of Nuclear Polythedrosis Virus Isolated from the Tobacco Cutworm, Spodoptera litura (담배거세미나방 핵다각체병 바이러스의 병원성)

  • 임대중;박범석;진병래;최궤문;강석권
    • Korean journal of applied entomology
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    • v.27 no.4
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    • pp.219-224
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    • 1988
  • Rearing of Spodoptera litura fed on arfificial diet basically formulated with kindby bean powder was much promisible for production of S. litura nuclear polyhedrosis virus(SINPV) than that on kidney bean leaves. The $LC_{50}$ of SINPV against 3rd and 5th instar were $4.48{\times}10^{3}$ PIB/ml and $4.52{\times}10^{4}$ PIB/ml, respectively. The $LC_{50}${/TEX} of SINPV varied from 5.8 days to 7.7 days at higher inocula in the testes. The larval growth of 1st and 3rd instar larvae fed on virus were much delayed and the larval were killed within 4th instar in the former and within 5th instar in latter. S. litura larvae were very susceptible to multinucleocapsid nuclear polyhedsosis virus (MNPV) of Autographa californica, S. littoralis and Trichoplusia ni.

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Age-related Susceptibility of Spodoptera litura Larvae to Some Insecticides (담배거세미나방 유충의 영기별 약제 감수성)

  • 조점래;송원례;황선영;김홍선;이정운
    • Korean journal of applied entomology
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    • v.35 no.3
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    • pp.249-253
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    • 1996
  • In the laboratory study, the toxicities of chlorpyrifos-methyl, chlorpyrifos, etofenprox, etofenprox+PAF' and deltamethrin for different larval instars of S. litura decreased significantly as larvae aged. LCso values for chlorpyrifos- methyl and chlorpyrifos increased significantly from 3rd instar larvae, while those for etofenprox+PAP and deltamethrin-increased from 2nd instar larvae. In pot study, no significant differences in control efficacy were observed among each treated plots and over 90% control efficacy at 5 d after treatment was obtained in all of the treated plots, except treatment with deltamethrin. Therefore four insecticides excluding deltamethrin will be effective for controlling S. litura. However, it will be probably important to select appropriate insecticides and decide a proper time of treatment because the developmental stage is a significant factor in deciding insecticide efficacy because various developmental stages of the tobacco cutworm inhibit in fields.

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Seasonal Occurrence of Tobacco Cutworm, Spodoptera litura Fabricius and Beet Armyworm, Spodoptera exigua Hübner Using Sex Pheromone Traps at Different Locations and Regions in Yeongnam District (영남지방 지역 및 지대별 담배거세미나방과 파밤나방 성충의 발생소장)

  • Bae, Soon-Do;Kim, Hyun-Ju;Lee, Geon-Hwi;Park, Sung-Tae
    • Korean journal of applied entomology
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    • v.46 no.1
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    • pp.27-35
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    • 2007
  • Seasonal occurrences of tobacco cutworm, Spodoptera litura and beet armyworm, Spodoptera exigua were observed using sex pheromone traps at different locations and climatic regions in Yeongnam district. In Gyeongnam province, S. litura male adults kept occur from mid or late March to mid or late November Whereas in Gyeongbuk province, S. litura occurred from mid or late April to early or mid November with exception at Uljin where it was late May to late October. According to the climatic regions, the peak occurrence of S. litura was middle September at the southern coast region, late August at the inland and the basin region, middle August at the inland mountainous region, and early September at the eastern middle coast region. The occurrence rate of S. litura was the highest at Jinju with 20.0% and the lowest at Changyeong with 8.6% in Cyeongnam province, while it was the highest at Sungju with 3.3% and the lowest at Uljin with 0.8% in Gyeongbuk province. In accordance with the climatic regions, the occurrence rate of S. litura was the highest at the inland region with 43.7%, and followed by the southern coast region (36.3%), the basin region (8.4%) and the inland mountainous region (7.0%), and was the lowest at the eastern middle coast legion with 4.6%. On the other hand, S. exigua occurred from early March to middle November with the exception of the eastern middle coast region including Pohang, Yeongdeog and U]ien in Cyeongbuk province where it occurred from mfd April to middle November. The peak occurrence of s. exigua was early August at the inland region, the basin region and the inland mountainous region, and was late of August at the southern coast region and the eastern middle coast region. The occurrence of S. exigua was the highest at Changyeong with 1.6% and the lowest at Busan with 0.4% in Gyeongnam province, while it was the highest at Sungju with 37.2% and the lowest at Uljin with 2.7% in Gyeongbuk province. The climatic regional occurrence rate of S. exigua was the highest at the basin region with 54.3%, and followed by the inland mountainous region (29.9%), the eastern middle coast region (9.3%) and the inland (3.9%), and was the lowest at the southern coast region with 2.6%. As a whole, S. litura occurred more in Gyeongnam province than Cyeongbuk province, while S. exigua occurred more in Gyeongbuk province than Gyeongnam province. According to the regions grouped by climatic differences, the occurrence of S. litura and S. exigua was the highest at the inland region in Gyeongnam province and at the basin region in Gyeongbuk province. The total number of S. litura captured by sex pheromone trap was 2.4 times higher than that of S. exigua. However, the first occurring time and the peak occurrence of S. exigua were slightly earlier than those of S. litura.

Lavicidal and Antifeeding Activities of Oriental Medicinal Plant Extracts against Plutella xylostella( Lepidoptera: Yponomeutoidae) and Spodoptera liture (Lepidoptera: Noctuidae) (배추좀나방과 담배거세미나방 유충에 대한 한방식물체의 살충활성 및 섭식 저해활성)

  • 권정현;안용준;권형욱;장경수;조광연
    • Korean journal of applied entomology
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    • v.33 no.4
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    • pp.225-229
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    • 1994
  • The methanol extracts from 30 species of oriental medicinal plants belonging to 24 families were tested for their lhicidal and antifeeding activit~es against diamondback moth (Plutello xylostella L) and tobacco cutworn (Spodoptera litura F.) by a leaf-dipping method at a concentration of 5, 000 ppm. The methanol extract from Copti chinensis only showed a potent larvicidal activity against P xylostello. Strong antifeeding activity against P. xylostello was observed from the extmds from Platycodon grandiflorurn, Codonopsis pilosula, Asomm sieboldii, Rhus chinensis and Uthospermum erythrorhizon And a potent antifeeding activity against S. liturn was obtained from Akebia quinata and Equlsetum hyemale extracts. A significant antifeeding activity against both species was obtained from R chinensis and C. chinensis extracts.

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Pathogenicity and Multiplication of Entomopathogenic Nematode, Steinernema carpocapsae Weiser, on Been Armyworm, Spodoptera exigua (Hubner) and Tobacco Cutworm, Spodoptera litura(Fabricius) (파밤나방(Spodoptera exigua (Hubner))과 담배거세미나방(Spodoptera litura(Fabricius))에 대한 곤충병원선충(Steinernema carpocapsae Weiser)의 감염력 및 증식력)

  • 한상찬;이성섭;김용균
    • Korean journal of applied entomology
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    • v.38 no.3
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    • pp.255-260
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    • 1999
  • Pathogenicity and multiplication of entomopathogenic nematode, Steinernema carpocapsae Weiser, ere analyzed in two insect hosts, Spodoptera exiga (Hubner) and Sp. litura(Fabricius). The estimated ${LC}^{50}s$(lethal concentration of the infective juveniles to kill 50% of the host insect population) were not different between tow insect species or among their developmental stages on the filter paper assay, thought the actual numbers of the infected nematodes were varied among them. The significant variation, however occurred in nematode multiplication between tow inset hosts. Temperature also gave sosignificatn effect on nematode multiplication rate that it took 6 days after infection at $25^{\circ}C$, but did 12 days at $20^{\circ}C$ to show the maximal nematode population peak($\approx$500,000 infective juveniles(IJ) in a 5th instar larva of Sp. litura and $\approx$-100,000 IJ in a 5th instar larva of Sp. exigua).

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Analysis on the Mass-Trapping Effects by Spodoptere litura (Fabricius) (Lepidoptera: Noctuidae) Sex Pheromone Traps Deployed around the Tomato Glasshouse (토마토 유리온실 주변에 설치된 담배거세미나방(Spodoptera litura(Fabricius)) 성페로몬 트랩에 의한 대량포획 효과분석)

  • Kim, Hwang-Yong;Kim, Jeong-Hwan;Son, Byeong-Gwan;Cho, Jum-Rae;Lee, Yong-Hwi;Kim, Yong-Heon;Choi, Man-Young
    • Korean journal of applied entomology
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    • v.48 no.2
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    • pp.245-251
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    • 2009
  • Without pesticide applications, mass-trapping by sex pheromone was successful to control Spodoptera litura (Fabricius) in a large scale tomato glasshouse (10,000 $m^2$) at a low cost of 60 won/$m^2$. Pheromone traps were placed both inside and outside of the glasshouse. Inside the glasshouse traps were installed in a regular space, one trap per 500 $m^2$, to catch the moths that were present in the glasshouse, and traps were also set outside of the glasshouse, at intervals of ca. 20 m, to prevent the moths from invading the glasshouse. In the experiment, more than 400 S. litura were captured per trap.

Leaf Characteristics of Leguminous Plants and the Biology of Tobacco Cutworm, Spodoptera litura Fabricius: II. Pupal Development and Adult Longevity (두류 품종별 잎특성과 담배거세미나방의 생태연구: II. 용발육 및 성충수명)

  • 배순도
    • Korean journal of applied entomology
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    • v.38 no.3
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    • pp.225-230
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    • 1999
  • This study was conducted to determine the effect of pupal development and adult longevity of Spodoptera litura larvae reared on leaves of different leguminos plants of 11 varieties or cultivars. Pupal duration varied from 8.7 to 9.5 days depending upon different diets and duration of female pupa (8.3~9.1 days) was about 1 day shorter than that of male's (9.4~10.1 days). Prepupal an postpupal duration were 1.7 to 2.0 days and 6.7 to 7.7 days, respectively. Pupal weight ranged from 0.23g to 0.43g for female and 0.24g to 0.35 g for male. Percent change of pupal weight was lowest (11%) on geomjeongkong-1 and highest (16%) on bukwangkong. Adult longevity was in ranging from 7.8 days on dongbu to 11.2 days on bukwangkong and tended to become slightly longer in female than tin male. Significant relationships were recognized between moisture content of feeding leaf, the pupal duration and weight and adult longevity.

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