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Unveiling the structure and distribution of plant-parasitic nematode communities in soybean fields in southern of the Brazil
European Journal of Plant Pathology ( IF 1.8 ) Pub Date : 2021-03-20 , DOI: 10.1007/s10658-021-02256-1
Luis Alejandro Yánez Márquez , Cesar Bauer Gomes , Cristiano Bellé , Leandro José Dallagnol , Jerônimo Vieira de Araújo Filho

Our study aimed to assess the structure and distribution of plant-parasitic nematodes in soybean [Glycine max (L.) Merr] in the south of Brazil. High taxonomical diversity was found, with records of 10 genera of plant-parasitic nematodes (PPNs), including important pests, such as Meloidogyne (mostly M. javanica with small esterase variability), Pratylenchus (mostly P. brachyurus) and Helicotylenchus spp. The Shannon-Weaver index (H) ranged from 0 to 1.23 (mean = 0.37), whereas Pielou’s evenness (J) ranged from 0 to 1 (mean = 0.51). The amount of PPNs (0 to 22,050 per 250 cm3 soil, and 0 to 15,500 per 10 g roots), incidence and abundance for Meloidogyne (28.6%; 50 to 19,250 per 250 cm3), Pratylenchus (45.1%; 50 to 550 per 250 cm3), Helicotylenchus (91.2%; 50 to 9,150 per 250 cm3), Tylenchus (34.1%; 50 to 550 per 250 cm3), Xiphinema (33%; 50 to 250 per 250 cm3), Mesocriconema (15.4%; 50 to 2,000 per 250 cm3), Rotylenchus (8.8%; 50 to 1,900 per 250 cm3), Hemicycliophora (1.1%; 50 per 250 cm3), Discocriconemella (1.1%; 950 per 250 cm3) and Tylenchorhynchus (1.1%; 50 per 250 cm3) were related differently to the bioclimatic variables under analysis. Our findings provide an update for the status of PPNs in the south of Brazil and suggest important epidemiological issues linked to the management of these pests in the near future.



中文翻译:

揭示巴西南部大豆田中植物寄生线虫的结构和分布

我们的研究旨在评估大豆的结构和植物寄生线虫的分布[大豆(L.)大豆-在巴西南部。高分类学多样性发现,用10属植物寄生线虫(的PPN),包括重要的害虫,诸如记录根结线虫(主要是爪哇根结线虫具有小酯酶变异性),短体线虫(主要是P. brachyurus)和螺旋线虫属。香农-韦弗指数(H ')的范围是0到1.23(平均值= 0.37),而皮耶鲁的均匀度(J)的范围是0到1(平均值= 0.51)。PPN的数量(每250 cm 3 0到22,050 3土壤,每10 g根为0到15,500),根结线虫的发生率和丰度(28.6%;每250 cm 3为50至19,250 ),桔梗(45.1%;每250 cm 3为50至550 ),螺旋藻(91.2%; 50到9150每250厘米3),Tylenchus(34.1%;每50至550250厘米3),剑线虫(33%;每50〜250250厘米3),Mesocriconema(15.4%;每50至2,000250厘米3),轮虫(8.8%;每250 cm 3为50至1,900),半球隐壶菌(1.1%;每250 cm 3为50),盘球菌(1.1%; 950每250 cm 3)和Tylenchorhynchus(1.1%; 50每250 cm 3)与所分析的生物气候变量有不同的相关性。我们的发现提供了巴西南部PPNs状况的最新信息,并提出了在不久的将来与这些害虫管理相关的重要流行病学问题。

更新日期:2021-03-21
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