Effect of two transmission pathways on incidence pattern of pine wilt

两种传播途径对松材线虫病发病模式的影响

• 批准号: 07660195
• 负责人: TOGASHI Katsumi
• 金额: $ 1.41万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07660195/
• 关键词: pine wilt disease; Bursaphelenchus xylophilus; Bursaphelenchus mucronatus; transmission rate; transmission pathways; Monochamus alternatus; Monochamus saltuarius; pine trees

Two nematode species, Bursaphelenchus xylophilus and B.mucronatus, are transmitted by two cerambycid species, Monochamus alternatus and M.saltuarius, in Japan. Transmission occurs via feeding and oviposition wounds of insect vectors. Mathematical model of transmission via two pathways was constructed and the rate of transmission was estimated in forests. The estimate was 0.11 for avirulent B.mucronatus while 0.0062 for virulent B.xylophilus. B.mucronatus was shown to move between M.saltuarius during its mating behavior. The nematode transmission from male to female vectors occurred easier than the reversed case. The nematodes moving from male to female vectors were shown to be transmitted to pine bolts via the oviposition wounds. When B.mucronatus entered the pinebolts via M.saltuarius oviposition wounds, it remained within 0.75 cm of the ovipositor-inserted holes at least for 24 hours. In the B.mucronatus-M.saltuarius system, 17 % of nematodes which had been in the vector bodies at emergence were transmitted via the oviposition wounds and 6 % via the feeding wounds. In the B.xylophilus-M.alternatus system, 3 % of nematodes present in newly-emerged vectors were transmitted via the oviposition wounds and 12 % via the feeding wounds.

在日本，松材线虫和拟松材线虫由松墨天牛和跳天牛传播。通过昆虫媒介的取食和产卵伤口传播。建立了两条传播途径的数学模型，并估算了其在森林中的传播速率。对无毒力的B.mucronatus的估计值为0.11，而对强毒力的B. xylophilus的估计值为0.0062。B.mucronatus在其交配行为中在M.saltuarius之间移动。线虫从雄虫到雌虫的传播比从雌虫到雄虫的传播容易。线虫从雄虫到雌虫的传播途径是通过产卵伤口传播到松栓上。当B.mucronatus通过M.saltuarius产卵伤口进入松栓时，它至少在产卵孔的0.75 cm内停留24 h。在B.mucronatus-M.saltuarius系统中，羽化时已在媒介体内的线虫有17%通过产卵伤口传播，6%通过取食伤口传播。在B.xylophilus-M.alternatus系统中，3%的线虫通过产卵伤口传播，12%通过取食伤口传播。

项目成果

Kuno, Eiji: Development in Insect Population Ecology. Kyoto University Press, 455 (1996)

Kuno，Eiji：昆虫种群生态学的发展。

Togashi,Katsumi: "Horizontal transmission of Bursaphelenchus mucronatus (Nematoda : Aphelenchoididae) between insect vectors of Monochamus saltuarius (Coleoptera : Cerambycidae)" Applied Entomology and Zoology. 31. 317-320 (1996)

Togashi，Katsumi：“Bursaphelenchus mucronatus（线虫纲：滑刃线虫科）在 Monochamus saltuarius（鞘翅目：Cerambycidae）昆虫媒介之间的水平传播”应用昆虫学和动物学。