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KMID : 1041220040460020058
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Journal of Sericultural and Entomological Science
2004 Volume.46 No. 2 p.58 ~ p.64
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Monitoring of Toxicants Affecting Metamorphosis of Silkworm in Mulberry Leaves
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Park Kyung-Hoon
Park Yeon-Ki
Lee Hee-Dong
Park Byung-Jun
Joo Jin-Bok
Sohn Bong-Hee
Kang Pil-Don
Kim Mi-Ja
Sung Su-Il
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Abstract
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The current study was performed to clarify the pupation disorder symptoms in silkworm which herbicide, molinate has been regarded as a causal origin. Molinate residues in mulberry leaves was monitored in major rearing area of silkworm; Yeacheon, Sangju and Namwon. Detected range of the molinate in mulberry leaves was 0.002 to 0.013 mg/kg and detection frequency was 30.0 to 81.8%. Molinate concentration in the air of mulberry tree growing area was $0.004\;{\mu}g/m^3$. Water diluted solution of molinate at the concentration of 1, 10, 100 mg/l gave no abnormal symptoms in silkworm irrespective of spraying to silkworm or spiking to diet. Exposing the silkworm to the air containing 250, 2,500, and $10,000\;{\mu}g/m^3$ also revealed no abnormal symptom. These results illustrated that the abnormal growth of silkworm encountered in the field was not caused by pesticide contamination.
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KEYWORD
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Silkworm, Pupation disorder, Herbicide, Abnormal Symptom
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