• Title, Summary, Keyword: Chilo suppressalis

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First Report on Hirsutella subulata, a Pathogen of Rice Stem Borer, Chilo suppressalis in Korea (국내 미기록 이화명충 병원사상균(Hirsutella subulata)에 관한 보고)

  • Yoon, Cheol-Sik;Kim, Jeong-Jun;Lee, Min-Ho;Yun, Tae-Yu;Yoo, Jae-Ki
    • The Korean Journal of Mycology
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    • v.27 no.3
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    • pp.206-207
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    • 1999
  • Hirsutella subulata (Hyphomycetes) was observed for the first time on diseased larvae of Chilo suppressalis in Korea. This fungus formed slender and slightly attenuated synnemata consisting of closely bound, longitudinal hyphae on the insect larvae. Typical characteristics of this species are ellipsoid or broadly obovoid phialides with slender, needle-like necks and asymmetric conidia. It is very similar to H. barberi but can be distinguished by its asymmetrical conidia.

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Investigation of Biological Characteristics of Rice Stem Borer (Chilo suppressalis Walker) and Variation in its Occurrence Patterns Among Crops (작물별 이화명나방의 발생양상 변동과 생물적 특성 연구)

  • Choi, Nak Jung;Choi, June-Yeol;Lee, Bong-Choon;Kim, Sang-Min;Ra, Ji-Eun;Baik, Chai-Hun;Lee, Jong Jin
    • Journal of Environmental Science International
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    • v.26 no.1
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    • pp.47-54
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    • 2017
  • We analyzed the variation in occurrence time and intensity of attacks by the rice stem borer (Chilo suppressalis Walker) on several crops. This study aimed to understand how C. suppressalis damages crops and to utilize this basic data for the establishment of environment-friendly control methods like pheromone traps. This study surveyed the changes in occurrence patterns of C. suppressalis, biological characteristics of overwintering larvae, and the efficacy of different types of pheromone traps the years. We found similar occurrence patterns of C. suppressalis in different crops. In addition, occurrence time of the first generation was advanced. Overwintering larvae showed no difference in pupal period and weight compared to the non-overwintering ones. However, the larval period was reduced to 19.1 days in Miscanthus field, in contrast to that in the paddy fields. It was confirmed that larvae of C. suppressalis generally prefer the lower part of the stems of Miscanthus. Efficiency of the emergence trap was confirmed to be greater than that of the delta trap for capturing C. suppressalis adults. However, it is necessary to adjust the control period because of the advancement in occurring time of C. suppressalis in recent years. The larvae of C. suppressalis experience favorable environmental conditions for overwintering in Miscanthus fields. The major Miscanthus fields are generally located in the areas protected for sources of drinking water, owing to which spraying of chemical pesticides is very limited. The results of this study provide important inputs for the development of environment-friendly control methods.

Studies on Varietal Resistance of Rice to Striped Rice Borer, Chilo suppressalis Walker (이화명충 (Chilo suppressalis W.)에 대한 벼품종 저항성에 관한 연구)

  • Lee Jeang-Oon;Park Joong-Soo;Kim Hong-Sun
    • Korean journal of applied entomology
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    • v.13 no.2
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    • pp.83-88
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    • 1974
  • Several selected rice varieties Tong-il (Suweon #213-1), Jinheung, IR747, Suweon #229 and so forth were evaluated for their resistance to the striped rice borer, Cltilo suppressalis Walker. The resistance appears to be non-preference and antibiosis in nature. Under laboratory and greenhouse conditions, resistance to striped rice borer was manifested by the low larval weight, percentage of pupation and number of eggs recorded. In the cage test, varieties Suweon #240 and Shenshuraku appeared to be non-preferred by the borer moths for oviposition. Under field condition, variety Tetep received the lowest percentage of infested tillers.

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Development of Insect Population Dynamics and Forecast Models: A Case of Chilo suppressalis(Walker) Occurrence in Suwan (해충발생동태 및 예찰모델 개발: 수원에서의 이화명나방 발생 사례)

  • 이준호
    • Korean journal of applied entomology
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    • v.38 no.3
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    • pp.231-240
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    • 1999
  • The long-term tend an pattern changes of Chilo suppressalis(Walker) occurrence in Suwon were analyzed and the forecasting models for spring emergence of C. suppressalis in Suwon were developed. From 1965 to 196, the population dynamics of C. suppressalis in Suwon shows a cyclic fluctuation with one large peak an one small peak, and its periodicity was ca. 36 generations(18 years). C. suppressalis population dynamics in Suwon was characterized as controlled by the endogenous dynamics dictated by the 1st order negative feedback mechanism (fast density dependence). The dynaics mechanism of C. suppressalis populations was not changed although its population density decreased drastically over the years. Using th dta of C. suppressalis spring occurrence in Suwon, forecasting models for spring emergence of C.supressalis were developed based on temperature-dependent development model or degree days. In general, these models well described the C. suppressalis spring emergence pattern in Suwon. Also, forecasting problems in spring moth emergence related with C. suppressalis population dynamics were discussed.

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Chemical Resistance of Striped Rice Borer, Chilo Suppressalis, and Green Rice Leafhopper, Nephotettix cincticeps (이화명충과 끝동매미충의 약제저항성)

  • Lee Seung Chan;Yoo Jai Ki
    • Korean journal of applied entomology
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    • v.14 no.2
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    • pp.65-70
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    • 1975
  • The study was planned to detect resistance levels of striped rice borers (Chilo suppressalis Walker) and green rice leafhoppers(Nephotettix cincticeps Uhler) from different localities to organophosphate and carbamate insecticides using topical application. Strains of overwintering striped rice borers were collected from 7 different areas in Gyeonggi Province and they were kept under conditions of about $25^{\circ}C$ for 10 days. Overwintered and reared larvae of striped rice borers were compared for response to insecticides. The strains of green rice leafhopper were collected from Iri, Milyang, Pyongtaek, Echeon and Suweon. Insects were multiplied in the lab. All insecticides tested were organphosphates(MPP, MEP and Diazinon) and carbamate (NAC), which have been used in control of rice insect pests for over past 10 years. The results obtained were as follows; a. With MPP compound, resistant levels of the Joam, Suweon, and Echeon strains of C. suppressalis were from 2 to 4 times as compared with the Yangpyong strain. b. With MEP insecticide, resistant levels of the Kimpo, Pyongtaek, Yongin, Echeon, Suweon, and Joam strains of C. suppressalis were from 2 to 6 times as compared with the Yangpyong strain. c. With Diazinon, resistant levels of the Suweon strain of C. suppressalis were 3 times greater than the Yangpyong strain; but the resistant levels of Kimpo, Pyongtaek, Yongin, and Echeon strains approximated the later. 4. The overwintered larvae of C. suppressalis were more tolerant to the insecticides than the larvae reared in the lab. e. With MEP, resistant levels of the Iri, Milyang, and Pyongtaek strains of N. cincticeps to the Suweon strain showed 13, 8, 7 and4 times, respectively. f. With MPP, resistant levels of the Iri and Pyongtaek strains of N. cincticeps were 7 and 4 times as compared with the Suweon strain, respectively. g. With NAC, resistant levels of the several strains of if. cincticeps showed no difference, and seemed not to have developed resistance yet.

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Control of Overwintering Striped Rice Borer, Chilo suppressalis W. in Straw Handicrafts with Phostoxin Fumigation (Phostoxin 훈증 처리에 의한 볏짚 제품내의 월동 이화명충 방제)

  • Chang Y. D.;Kim H. S.;Yoo J. K.
    • Korean journal of applied entomology
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    • v.17 no.1
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    • pp.71-73
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    • 1978
  • Overwintering striped rice borer, Chilo suppressalis W. larvae, pupae and adults in rice straw handicrafts were exposed to different doses and periods of phostoxin in gas chambers(ave.temp. 27C). The following results were obtained; 1. For 100 percent mortality, larvae required 48 hours, pupae 24 hours and adults only 8 hours of exposure. 2. The insecticidal effect of tile fumigant was more dependent upon the length of exposure than the dosage of fumigant.

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Progress of Rice Injury Caused by the First Generation of Striped Rice Borer(Chilo suppressalis(Walker)) (Lepidoptera: pyralidae) (제1화기(第1化期) 이화명나방(Chilo suppressalis (Walker))에 의(依)한 수도피해(水稻被害) 진전양상(進展樣相))

  • Ryoo, Mun-Il;Lee, Moon-Hong
    • Korean journal of applied entomology
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    • v.25 no.1
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    • pp.17-20
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    • 1986
  • Based on the data of rice injury caused by the first generation of striped rice borer(Chilo suppressalis (Walker)), which were collected in the three years from 1974 to 1976 in Sweon area, progress of the injury in relation to Degree Days was studied. Increase in the number of infested stems was strongly related to the dispersal features of larvae. The increase ceased at about 400 DD after modal emergence date when the larval distribution pattern became stable. The regression of the number of infested stems per infested hill on Degree Days was significant and the coefficients of determaination were 0.84 and 0.95 for 1974 and 1976, respectively. The regression coefficients in the two years were not statistically significant, suggesting a possibility for pre- diction of the mean number of infested stems per infested hill through a simple model.

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Control Effect of Insecticides against Chilo suppressalis Walker of Native Miscanthus in Korea (국내 자생 억새를 가해하는 이화명나방의 방제 처리 효과)

  • Yu, Gyeong-Dan;Lee, Ji-Eun;Jang, Yun-Hui;Moon, Youn-Ho;Cha, Young-Lok;Song, Yeon-Sang;Lee, Kyeong-Bo
    • Weed & Turfgrass Science
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    • v.5 no.4
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    • pp.230-235
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    • 2016
  • Miscanthus are perennial rhizomatous grasses and considered as an ideal cellulosic bioenergy crop. Recently, it was reported that Miscanthus was damaged by the larvae of rice stem borer, Chilo suppressalis Walker, one of the most destructive pests of rice in Korea since the 1960s. This study was thus conducted to evaluate the insecticidal effects against rice stem borer in the Miscanthus cultivation fields for two years. The experiment consisted of four chemical agent plots, one environment-friendly agent plot, and untreated plot. Untreated plot showed significantly high damage of 50%, while Buprofezin Tebufenozide and Carbosulfan Methoxyfenozide treatment plots showed low damage rate of 2% with low larvae density of 1 and $2.3larvae\;m^{-2}$, respectively. Damage rates of Tebufenozide, ChlorantraniliproleIndoxacarb, and environment-friendly agent(MatrineWood vinegar solution) were 15, 26, and 18%, respectively, which were lower than that of untreated plot but higher than those of Buprofezin Tebufenozide and Carbosulfan Methoxyfenozide. In conclusion, rice insecticides were effective against rice stem borer in Miscanthus field. In particular, the treatments with Buprofezin Tebufenozide and Carbosulfan Methoxyfenozide showed excellent control effects with control value of 93.3 and 95.2. However, further studies with different types of insecticides should be carried out for the selection of insecticides with more effective control of rice stem borer.