The distribution and form of pine wood nematode (PWN) were investigated in Jinju-si and Sacheon-si areas, where infested with pine wilt disease (PWD). The average PWN population per g of the tubulation part in the wilted Japanese balck pine were 381.2 and 341 in Jinju-si and Sacheon-si, respectively. The PWN population per g of affected Japanese black pine with wilt rate below 60% were 556 and 518 in Jinju-si and Sacheon-si, respectively. The ratios of PWN and other plant-parasitic nematode in the wilted Japanse black pines were 48% vs. 52% in Jinju-si and 53% vs. 47% in Sacheon-si after exposure to PWD for 1 year. The survivorship of pine wood nematode in the sampled trees after 1 year was 0-10% in the Jinju-si area and 5-20% detected in the Sacheon-si area. In the forest areas affected by PWN, the highest survival rates were 37.2% and 39.8% at 25 cm diameter at breast height (DBH) in Jinju-si and Sacehon-si, respectively, while the highest wilt rates were 30.5% and 28.3% at 30 cm DBH in Jinju-si and Sacehon-si, respectively.
목차
Abstract Introduction Materials and Methods Survey sites Field investigation Results and Discussion The density of bursaphelenchus xylophilus in thewilted black pines by the location in the tree The population of PWN by the wilting rate of black pine DBH of the normal trees and the wilted ones The proportion of pine wood nematode and other similar kinds of parasitic nematodes by phase Surviving time of the pine wood nematode in the wood samples The survival rate of pine wood nematode by differentsurface water content rates References
키워드
pine wood nematodeswater content rateblack pinetree survivalwilted trees
저자
Man-Leung Ha [ Department of Forest Resources, Gyeongnam National University of Science and Technology, Jinju 52725, Republic of Korea ]
Chong-Kyu Lee [ Department of Forest Resources, Gyeongnam National University of Science and Technology, Jinju 52725, Republic of Korea ]
Corresponding author