• Title/Summary/Keyword: Mulberry longicorn beetle

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Ecological Characteristics of Mulberry Longicorn Beetle, Apriona germari Hope, at the Hibernation Stage in Mulberry Fields (뽕밭에서 월동하는 뽕나무하늘소(Apriona germari Hope)의 생태적 특성)

  • 윤형주;박인균;마영일;이상범;양성열
    • Korean journal of applied entomology
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    • v.36 no.1
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    • pp.67-72
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    • 1997

  • To study the ecological characteristics of the mulberry longicorn beetle, Apriona germari Hope, Mulberry branches with egg-laid scar were regionally collected from ten mulberry fields during the hibernation. It showed that its distribution was highest in Kyunggi province with 3.05% and lowest in Kyungnam province with 0.28%. The number of the egg-laid scar per branch was single with 87.7% of high frequency and its average size was 2.38 L$\times$1.45 W$\times$0.34D cm. The average diameter of scarred branch was 1.7 cm, ranging from 1.3 to 1.9 cm. the shape of egg was long elliptical with width of $2.32\pm$0.33 mm and with length of $6.606.60\pm$0.55 mm. the weight of egg was $16.6\pm$2.94 mg and the color of the just-oviposited egg was milky white, changing into thick brown with time. The weight and length of the just-hatched larva was $16.6\pm$2.4 mg and $6.36\pm$0.66 mm. respectively. Most of the larvae moved downward inside the branch, showing that 94.2% of larvae for outdoor rearing and 87.9% of larvae for indoor rearing moved downward in the branch. As a result, it was found that it hibernated at egg stage with a higher rate than at larval stage by two or three folds in Kyunggi and Kyungbuk province and contrarily at larval stage with higher rate than at egg stage in Chunbuk, Chunnam and Kyungnam provinces. The survival rate for the egg after hibernation was significantly low with 6.6% and contrarily for the larva after hibernation remarkably high with 91.2%. Although the survival rate of the egg in this survey was relatively low, the result indicated that there were two types of hibernation of A. germari in Korea; egg and larval stage.

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Isolation of Non-toxic Bacillus thuringiensis Strains from the Dead Larvae of Apriona germari and Aphodius apicalis (뽕나무하늘소(Apriona germari) 및 왕똥풍뎅이 (Aphodius apicalis) 사충으로부터 무독성 Bacillus thuringiensis의 분리)

  • 장진희;박현우;진병래;윤형주;마형일;강석권
    • Korean journal of applied entomology
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    • v.36 no.3
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    • pp.264-269
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    • 1997

  • Four strains of Bacillus thuringiensis were isolated froin the dead larvae of mulberry longicorn beetle (Apriong germari) and dung beetle (Aphodius apicalis). One nf four B. thuringiensis isolates turned out to be subspecies darinstadiensis but the remains were not identified using 33 B. thuringiensts flgellar ( H ) antibodies. Furthermore. bioassays of spore-parasporal inclusion protein mixture conducted against third instar larvae of A. gerrntrri or A. apicalis, second instar larvae of Bombyx mori, and third instar larvae of Cu1ex pipiens pullens showed that the isolates were non-toxic. To further confirm, four isolates were characterized and analysed by SDS-PAGE and agarose gel electrophoresis. The results revealed that parasporal protein and plasmid DNA patterns of four isolates are different from those of darmstadiensis and 20 known non-toxic B. thuringiensis strains, suggesting that the four isolates are novel non-toxic B. thuringiensis.

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