• Korean journal of applied entomology
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• v.58 no.1
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• pp.31-35
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• 2019

Many forest pests have caused problems for wood quarantine. The fumigation activity of phosphine ($PH_3$) was examined for the adults of three wood-boring insect pests. The $LCT_{99}$ values for Platypus koryoensis, Cryphalus fulvus, and Xyleborus mutilates were 3.192, 0.994, and $0.501mg{\cdot}h/L$ at $20^{\circ}C$, respectively. The effectiveness of $PH_3$ was increasingly time dependent for all doses tested in all three species. In particular, P. koryoensis showed 100% mortality at doses higher than 0.4 mg/L 7 days after fumigation. These results indicate that methyl bromide could be substituted for $PH_3$ for adults of these three species of wood pest.

• Korean journal of applied entomology
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• v.28 no.1
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• pp.1-3
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• 1989

Parasitylenchus orthotomici sp. n. is described as a nematode parasite of Orthotomicus an¬gulatus in Korea. In a sample of 170 beetles randomly collected from Pinus densiflora S. et. Z, 51. 8% were parasitized by nematodes. The number of nematodes per bark beetle was ranged from 1 to 97. The parasitisms of F, generation were ranged from 43.2% to 52%. There was no positive tendency in nematode parasitism between sun-side and shade-side.