Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Survey of plant-parasitic nematodes associated with yams in Ogun and Osum States of Nigeria

100%

Adegbite A. A., Saka J. O., Agbaje G. O., Osuloye F. O.

Journal of Plant Protection Research

2008

tom 48

nr 4

421-428

A survey was conducted to determine the types, frequency and population of plant parasitic nematodes associated with the soils and roots of Yam (Dioscorea species) in all the Local Government Areas of Ogun and Osun States of Nigeria using random sampling soil and root and pie pan modification of Baerman funnel for plant parasitic nematode extraction. Ten and nine genera of plant parasitic nematodes were encountered both from the soils and root samples from the two States. Plant parasitic nematodes recovered included Scutellonema spp., Meloidogyne spp., Pratylenchus spp., Trichodorus spp., Helicotylenchus spp., Radopholus spp., Longidorus spp., Xiphinema spp., Rotylenchulus spp and Aphelenchoides species. Scutellonema spp., Meloidogyne spp., and Pratylenchus spp were most widely distributed with frequency ratings of 70, 65 and 60% respectively in soil samples from Ogun State and in the root samples the three genera predominated with 60, 55 and 45% frequency ratings respectively. Meloidogyne spp., Scutellonema spp., and Pratylenchus spp were most widely distributed with frequency ratings of 65, 45 and 35% respectively in soil samples from Osun State and in the root samples the three genera predominated with 55, 35 and 35% frequency ratings respectively.

Assessment of yield loss of roselle [Hibiscus sabdariffa L.] due to root-knot nematode, Meloidogyne incognita under field conditions

100%

Adegbite A. A., Agbaje G. O., Abidoye J.

Journal of Plant Protection Research

2008

tom 48

nr 3

267-274

Root-knot nematode Meloidogyne incognita (Kofoid & White) Chitwood is an economically important pathogen of many agricultural crops, and the frequency of occurrence, abundance and importance of this nematode in resource-poor agricultural production systems make control necessary. Field studies were conducted in 2004 and 2005 to determine yield loss of Roselle due to natural infestation by M. incognita using Carbofuran 3G at 2 kg a.i./ha and untreated as check. The yield of Roselle was found to be higher with the application of nematicide-Carbofuran 3G at 2 kg a.i./ha. The percentage increase over control was 48.7 and 40.8% in the years 2004 and 2005, respectively. A significant reduction in the yield of Roselle in untreated plots was mainly attributed to direct damage of the root system by the feeding of root-knot nematode M. incognita. Root-knot nematode population in carbofuran treated plots was significantly lower than in untreated check in the two years, also at harvest. In the check the nematodes multiplied many folds during the cropping season. High nematode population in the untreated check decreased plant growth and ultimately reduced the number of seeds and weight of seeds.

Ograniczanie wyników

2 Journal of Plant Protection Research

2 Adegbite A. A.

2 Agbaje G. O.

1 Abidoye J.

1 Osuloye F. O.

1 Saka J. O.

2 2008

Wyniki wyszukiwania

Survey of plant-parasitic nematodes associated with yams in Ogun and Osum States of Nigeria

Assessment of yield loss of roselle [Hibiscus sabdariffa L.] due to root-knot nematode, Meloidogyne incognita under field conditions