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Plant Pathology Journal
  Year: 2010 | Volume: 9 | Issue: 4 | Page No.: 162-168
DOI: 10.3923/ppj.2010.162.168
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Pathogenicity of Meloidogyne incognita Race 1 on Turmeric (Curcuma longa L.) as Influenced by Inoculum Density and Poultry Manure Amendment
Idorenyin A. Udo and Kevin I. Ugwuoke

A glasshouse experiment was conducted to assess the pathogenicity of Meloidogyne incognita race 1 on turmeric (Curcuma longa L.) at three inoculum densities (0, 2500, 5000 eggs plant-1) and soil amendment with different levels of Poultry Manure (PM) (0, 10, 20, 30 and 40 t ha-1). The results obtained showed that root-galling and egg production decreased in a linear response to increasing PM level at both low and high inoculum densities (r = -0.88 and r = -0.85, respectively; p≤0.01). The lowest gall index and egg mass index of 2.0 were recorded in plants amended with 40 and 30 t ha-1 PM, respectively. The high nematode density was more pathogenic (p≤0.05) than the low density. Shoot length, fresh shoot and root weights responded in a curvilinear pattern with increasing levels of PM. In general, these growth variables increased with increase in PM level up to 20 t ha-1 and then declined with further increase. At high inoculum density, shoot growth was enhanced by 242 and 58% with 20 and 40 t ha-1 PM relative to unamended soil, respectively. Conversely, fresh root weight was increased by 120% and reduced by 12.8% with 20 and 40 t ha-1 PM, respectively. From this study, it could be inferred that higher levels of PM were highly nematicidal but phytotoxic to turmeric plants; the optimal rate of PM amendment is predicted to be 18-22 t ha-1. However, for this method to be incorporated into Integrated Nematode Management Programme of turmeric, field trials are needed for the optimization of the quantity, time and method of application.
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  •    Management of Root-Knot Nematode, Meloidogyne javanica on African Yam Bean with Pig Excrements
  •    Efficacy of Soil Amendment with Leaf Powder of Hyptis suaveolens (L.) Poit in the Control of Meloidogyne javanica (Treub) Chitwood on the African Yam Bean, Sphenostylis stenocarpa (Hochst Ex A. Rich) Harms
How to cite this article:

Idorenyin A. Udo and Kevin I. Ugwuoke, 2010. Pathogenicity of Meloidogyne incognita Race 1 on Turmeric (Curcuma longa L.) as Influenced by Inoculum Density and Poultry Manure Amendment. Plant Pathology Journal, 9: 162-168.

DOI: 10.3923/ppj.2010.162.168








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