Growth Response and Susceptibility of Telparia Occidentalis Hook Lines to the Root-knot Nematode Meloidogyne Incognita

Nigerian Journal of Horticultural Science Pub Date : 2007-09-25 DOI:10.4314/NJHS.V10I1.3409

E. Nwanguma, A. Olufolaji, H. Akintoye

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引用次数: 1

Abstract

The productivity and host suitability of fifteen lines of fluted pumpkin Telfairia occidentalis HOOK f. were evaluated in a root-knot nematode infested field in the early seasons of 2001 and 2002. The root systems of twelve week-old root-knot nematode-infected Celosia argentea L. cv. TLV-13 plants earlier grown on the plot were ploughed into the plot to serve as primary source of inoculum. Pre-planting soil nematode population (Pi) of the experimental plot was assessed from composited 200cm 3 soil. The experiment was laid out in a randomized complete block design with three replications. Growth response of line EN2000-4 was statistically outstanding when compared with the other tested lines. The vine lengths recorded for lines EN2000-4, EN2000-6, EN2000-11 and EN2000-12 were significantly longer than the other tested lines. The lower values however occurred in lines EN2000-1, EN2000-5, EN2000-7 and EN2000-8. Line EN2000-3 recorded the highest soil and root nematode populations, gall index as well as the highest number of egg-mass. Line EN2000-4 showed the highest level of resistance with significantly low nematode populations, gall index and number of egg-mass. Significant negative correlation was respectively observed between the growth characters and measured indices of nematode infection i.e. (nematode populations (soil and root), gall rating as well as number of egg-mass). Significant positive correlation was also observed between number of pods and plant vigour. Leaf fresh weight was significantly correlated with shoot fresh weight and number of pods. Similarly, number of leaf was correlated with shoot fresh weight. Correlation between soil nematode population, root nematode populations, gall rating and egg-mass were highly significant. Fresh shoot weight was negatively correlated with all the measured indices of nematode infection, but they were not significant.. Keywords : Growth, susceptibility, root-knot nematodes, Telfairia occidentalis Nigerian Journal of Horticultural Science Vol. 10 2005: pp. 52-58

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西部铁虱钩线对根结线虫的生长响应及敏感性

在2001年和2002年的根结线虫侵染地，对15个南瓜品系的产量和寄主适宜性进行了评价。根结线虫侵染12周龄青花的根系。将田间较早生长的TLV-13植株犁入小区，作为接种物的主要来源。采用200cm3复合土壤对试验田种植前土壤线虫种群(Pi)进行评价。试验采用完全随机区组设计，设3个重复。与其他被试品系相比，EN2000-4的生长响应具有统计学上的显著性。品系EN2000-4、EN2000-6、EN2000-11和EN2000-12的藤长明显长于其他品系。然而，较低的值出现在EN2000-1、EN2000-5、EN2000-7和EN2000-8行。EN2000-3系土壤和根线虫种群、虫瘿指数和卵团数最高。株系EN2000-4表现出最高的抗性水平，线虫种群数量、瘿指数和卵团数显著降低。线虫侵染的测量指标(线虫种群(土壤和根)、虫瘿等级、虫卵质量数)与生长性状分别呈显著负相关。荚果数与植株活力呈极显著正相关。叶片鲜重与茎鲜重、荚果数呈极显著相关。叶片数与茎部鲜重也有相似的相关关系。土壤线虫种群、根线虫种群、虫瘿等级和虫卵质量之间的相关性极显著。鲜梢重与线虫侵染的各项测定指标均呈负相关，但不显著。关键词:生长，敏感性，根结线虫，尼日利亚园艺科学Vol. 10 2005: pp. 52-58

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Nigerian Journal of Horticultural Science

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