进口百合种球携入植物线虫数量风险初探

对荷兰和新西兰进口的8种百合种球入境时所携带的植物线虫种类和数量进行了检测,并进行了灭菌土栽培,以监测和探讨携入的线虫数量在花卉一个生长周期后的变化,进而为评价携入的植物线虫的数量风险提供科学依据。研究结果表明栽培前种球内的优势植物线虫——拟滑刃属和滑刃属线虫数量在百合一个生长周期结束后均以几何级数的速率增长;栽培前检出数量极少的垫刃属线虫,生长周期结束后却大量出现;栽培前少量检出的短体属、矮化属、根结属、丝尾垫刃属和伪垫刃属的线虫,周期结束后,均未再检测到。本研究结果初步表明拟滑刃属、滑刃属和垫刃属线虫具有较高的潜在危险性,其他检出的植物线虫类群潜在风险较小。

Pilot study on quantity risk of phytoparasitic nematodes brought in by imported lily corm

Classification and quantity of plant parasitic nematode,including quarantine nematode,brought in by the imported lily corm from Holland and New Zealand were studied.The imported lily corms were cultivated in sterilized humus and vermiculite substrate to inspect quantity changes before and after cultivation,by which the scientific data were collected for quantity risk evaluation of exotic phytoparasitic nematodes.The results showed that the quantities of plant parasitic nematodes of Aphelenchoides and Aphelenchus increased at a speed of geometric order after one growing season,which indicated that the two kinds of nematodes had highly potential risk.The phytoparasitic nematodes of Tylenchus appeared in a great lot after cultivation,even though there was only a few could be found in the corms before cultivation.More attentions should be paid to monitor the risk of potential fatalness.Some nematodes,particularly those from the genus of Pratylenchus,Tylenchorhynchus,Meloidogyne,Filenchus and Nothotylenchus could be found in small amounts before cultivation and no nematodes had been detected after lily growing season.The risks of these nematodes were lower than the others in this study.