scholarly journals Occurrence, Diversity and Abundance of Nematode Pests of Pineapple (Ananas comosus) in Two Local Government Areas of Rivers State, Nigeria

2021 ◽  
Vol 25 (4) ◽  
pp. 665-675
Author(s):  
A.A. Tanimola ◽  
O. Olotu ◽  
A.O. Asimiea
Keyword(s):  
Local Government ◽  
Diversity Indices ◽  
Ananas Comosus ◽  
Parasitic Nematodes ◽  
Yield Losses ◽  
Plant Parasitic Nematodes ◽  
Standard Procedures ◽  
Abundance And Diversity ◽  
Rivers State ◽  
Plant Parasitic

Plant-parasitic nematodes (PPNs) contribute to yield losses in pineapple production. Limited studies have been conducted on plant-parasitic nematodes on pineapple despite reports of PPNs infecting it. A survey was conducted in Obio-Akpor and Ikwerre Local Government Areas (LGAs) of Rivers State to determine the occurrence, abundance and diversity of PPNs associated with pineapple. A total of 60 composite samples were collected from the two LGAs. Nematodes were extracted from soil and root samples using the modified Baermann technique and identified using standard procedures. Data were processed using relative frequency of occurrence (RFOC), relative importance values (RIVs), diversity indices, nematode population was calculated and analysis of variance. The most occurring plant-parasitic nematodes were Pratylenchus, Helicotylenchus, Meloidogyne, Scutellonema and Tylenchulus. In Obio Akpor LGA, Helicotylenchus with RFOC 33.3% was the most occurring nematode pests, while Pratylenchus was the most important plant-parasitic nematode (RIV 33.8%). In Ikwerre LGA, both Helicotylenchus and Pratylenchus have the same occurrence (RFOC 33.3%) with Pratylenchus being the most important nematode pest. Pratylenchus species with RIV of 52.4% were the most important PPNs associated with pineapple in both Obio-Akpor and Ikwerre LGAs. Dominance and Shannon- Weiner indices among the PPNs are 0.58 and 0.86, respectively. In Ikwerre and Obio-Akpor LGAs, Aluu (1530) and Rumuekini (630) pineapple farms have the highest population of PPNs, respectively. Ikwerre LGA (2,150) pineapple farms had more PPNs than Obio-Akpor LGA (660). Nematode pests are associated with pineapple in the two LGAs and could be contributing to yield losses.

NEMATODE PARASITES OF WATERLEAF (Talinum triangulare) IN OBIO-AKPOR AND IKWERRE LOCAL GOVERNMENT AREAS OF RIVERS STATE, NIGERIA

2021 ◽  
Vol 5 (1) ◽  
pp. 140-150
Author(s):  
Adebowale Adegboyega Tanimola ◽  
A. O. Asimiea ◽  
G. Uwaoma
Keyword(s):  
Local Government ◽  
Sampling Technique ◽  
Nematode Species ◽  
Diversity Indices ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Nematode Parasites ◽  
Rivers State ◽  
Talinum Triangulare ◽  
Plant Parasitic

Waterleaf, Talinum triangulare is cultivated in home gardens and fields to improve nutritional quality for the family and a source of livelihood for farmers. However, the role of T. triangulare is often counteracted by plant-parasitic nematodes (PPNs). Effective management of PPNs will depend on the identification and determination of their population and distribution. A survey was conducted in two Local Government Areas (LGAs), Ikwerre and Obio-Akpor of Rivers State to identify plant-parasitic nematodes associated with waterleaf. Multistage random sampling technique was employed in the collection of 60 bulked soil and root samples across six waterleaf monoculture farming communities. The nematodes were extracted, identified and their population determined using standard procedures. Occurrences, relative importance values (RIV) and diversity indices were determined. Other data were analysed using descriptive statistics and analysis of variance. Six plant-parasitic nematodes genera were encountered in this study, Helicotylenchus, Pratylenchus, Paratylenchus, Meloidogyne, Scutellonema and Tylenchulus. Pratylenchus and Helicotylenchus were the most frequently occurring nematode pest genera with equal relative frequency of occurrence of 38.89%. Pratylenchus species with RIV of 61.34% was the most important nematode pest associated with waterleaf across the six farm communities. The dominance index of 0.71 for the nematode genera showed that some nematode species dominated others. Alakahia farms had the highest population of plant-parasitic nematodes (2,780) across the six farm communities, whereas Omagwa farms had the lowest (250). The study showed that nematode pests are associated with waterleaf and could be contributing to yield losses in this crop

Occurrence and importance of plant-parasitic nematodes in organic farming in Germany

Nematology ◽  
2007 ◽  
Vol 9 (6) ◽  
pp. 869-879 ◽  
Author(s):  
Andrea Frankenberg ◽  
Andreas Paffrath ◽  
Johannes Hallmann ◽  
Harald Schmidt
Keyword(s):  
Organic Farming ◽  
High Frequency ◽  
Production Systems ◽  
Parasitic Nematodes ◽  
Yield Losses ◽  
Plant Parasitic Nematodes ◽  
Severe Damage ◽  
Production Factors ◽  
Main Emphasis ◽  
Plant Parasitic

AbstractIn an attempt to evaluate the occurrence and economic importance of plant-parasitic nematodes in organic farming in Germany, a survey was conducted with the main emphasis on vegetable and cereal production systems. For vegetables, the survey included quantification and identification of plant-parasitic nematodes in soil samples and a questionnaire for growers querying production factors and damage levels. For cereals, the survey focused on quantification and identification of plant-parasitic nematodes in soil and plant samples. Overall, Pratylenchus and Tylenchorhynchus were the most prominent nematode genera under both production systems with an incidence of over 90% of the samples. Meloidogyne was detected in 51% of the samples in both systems. Other nematode genera showed differences between the two production systems. In production systems with a high frequency of vegetables, Paratylenchus was detected in 56% of the samples and Heterodera in 15%, whereas in rotations with a high cropping frequency of cereals, incidences of plant-parasitic nematodes were 56% for Heterodera, 47% for Trichodorus and 45% for Paratylenchus. Yield losses could exceed 50% on carrots, onions and cereals and were most pronounced on sandy soils. In many cases, nematode problems started 5 to 10 years after conversion to organic farming. The survey indicated that plant-parasitic nematodes are widely spread in organic farming in Germany and can cause severe damage which may result in complete loss of the crop.

Plant Parasitic Nematodes Status of Seed Yams in Khana L.G.A, Rivers State, Nigeria

2015 ◽  
Vol 3 (7) ◽  
pp. 266-273
Author(s):  
Sidney O. Nzeako ◽  
Ghenesoo A. Barisuka ◽  
Mary E. Torle ◽  
Helen O. Imafidor ◽  
Chinwendu N. Eze
Keyword(s):  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Rivers State ◽  
Plant Parasitic

scholarly journals A survey of plant-parasitic nematodes of yam farms in Awka-North local government area, Anambra state, Nigeria.

2016 ◽  
Vol 95 (1) ◽  
pp. 8950
Author(s):  
Vincent, C. Duru ◽  
Edith N. Nwankwo ◽  
Confidence U Ogbonna ◽  
A. E Onyido ◽  
O Adewuyi
Keyword(s):  
Local Government ◽  
Local Government Area ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Anambra State ◽  
Plant Parasitic

Plant-parasitic nematodes in some economically important crops in Myanmar – species, possible damage and control measures

Nematology ◽  
2018 ◽  
Vol 20 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Yu Yu Min ◽  
Koki Toyota
Keyword(s):  
Control Measures ◽  
Parasitic Nematodes ◽  
Yield Losses ◽  
Plant Parasitic Nematodes ◽  
Cropping Patterns ◽  
Oilseed Crops ◽  
Potential Impact ◽  
Collective Information ◽  
And Control ◽  
Plant Parasitic

Rice, pulses and oilseed crops are major exporting crops in Myanmar. Many plant-parasitic nematodes, such asMeloidogyne incognita,M. javanica,M. graminicola,Ditylenchus angustus,Hirschmanniella oryzae,Heterodera cajaniandPratylenchusspp., have been detected in these crops in different cropping patterns and are considered one of the reasons for their low yields. Previous surveys have shown potential impact to yield losses in the crops. This Forum article provides collective information on species of the major plant-parasitic nematodes, possible damage and available control measures to such economically important crops in Myanmar.

scholarly journals Survey of Plant-Parasitic Nematodes Associated with Yams in Ogun and Osun States of Nigeria

2008 ◽  
Vol 48 (4) ◽  
pp. 421-428 ◽  
Author(s):  
Ayodele Adegbite ◽  
Jelili Saka ◽  
Gideon Agbaje ◽  
Felix Osuloye
Keyword(s):  
Local Government ◽  
Random Sampling ◽  
Parasitic Nematode ◽  
Soil Samples ◽  
Plant Parasitic Nematode ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Ogun State ◽  
Plant Parasitic

Survey of Plant-Parasitic Nematodes Associated with Yams in Ogun and Osun States of NigeriaA survey was conducted to determine the types, frequency and population of plant parasitic nematodes associated with the soils and roots of Yam (Dioscoreaspecies) 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 includedScutellonemaspp.,Meloidogynespp.,Pratylenchusspp.,Trichodorusspp.,Helicotylenchusspp.,Radopholusspp.,Longidorusspp.,Xiphinemaspp.,Rotylenchulusspp andAphelenchoidesspecies.Scutellonemaspp.,Meloidogynespp., andPratylenchusspp 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.Meloidogynespp.,Scutellonemaspp., andPratylenchusspp 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.

scholarly journals Short Communication: Abundance and diversity of plant parasitic nematodes associated with BP 308 and BP 42 clones of robusta coffee in Java, Indonesia

2018 ◽  
Vol 19 (1) ◽  
pp. 67-70 ◽  
Author(s):  
MUTALA’LIAH MUTALA’LIAH ◽  
SIWI INDARTI ◽  
NUGROHO SUSETYA PUTRA
Keyword(s):  
Parasitic Nematodes ◽  
Limiting Factor ◽  
Plant Parasitic Nematodes ◽  
Field Site ◽  
Coffee Plantations ◽  
Robusta Coffee ◽  
Central Java ◽  
Abundant Genus ◽  
Abundance And Diversity ◽  
Plant Parasitic

Mutala’liah, Indarti S, Putra NS. 2018. Abundance and diversity of plant parasitic nematodes associated with BP 308 and BP 42 clones of robusta coffee in Java, Indonesia. Biodiversitas 19: 67-70. Plant parasitic nematodes are an important limiting factor in the productivity of coffee plantations. Clone resistance and soil texture influence the severity of plant infestation by parasitic nematodes. The aim of this research was to determine the diversity of plant parasitic nematodes in two clone of Robusta coffee (BP 308 and BP 42) on soils with different contents of sand. The research was carried out in Malangsari Field (East Java), Getas Field (Central Java) and Candiroto Field (Central Java). Nematodes were extracted from soil samples by the decanting method using a whitehead tray, while roots sample by the funnel spray method with a ‘mistifier’. Differences in diversity of nematode genera between clone and location combinations were analyzed by ANOVA. The results showed that there were five genera associated with Robusta coffee, i.e. Pratylenchus, Helicotylenchus, Radopholus, Rotylenchulus, and Meloidogyne. With clone BP 308 at the Malangsari Field site where soil contained 31.3 % sand, Pratylenchus was the most abundant genus i.e. 6 nematodes/100 mL soil. On the same clone, BP 308, at the Getas Field site where soil contained 26.9 % sand, Meloidogyne was the most abundant i.e. 14.4 nematodes/10 g roots. With clone BP 42 at the Candiroto Field site with 25.5 % sand in the soil, Pratylenchus was highly abundant i.e. 60 nematodes/10 g roots.

Diversity and population densities of plant-parasitic nematodes in commercial and smallholder pineapple production in Kenya

Nematology ◽  
2021 ◽  
pp. 1-14
Author(s):  
Agnes W. Kiriga ◽  
Danny Coyne ◽  
Janet G. Atandi ◽  
Nikolai V. Beek ◽  
Solveig Haukeland
Keyword(s):  
Management Practices ◽  
Crop Yields ◽  
Production Systems ◽  
Ananas Comosus ◽  
Parasitic Nematodes ◽  
Yield Reduction ◽  
Plant Parasitic Nematodes ◽  
Population Densities ◽  
High Level ◽  
Plant Parasitic

Summary Plant-parasitic nematodes (PPN) cause significant yield reduction in commercial pineapple (Ananas comosus) worldwide. In Kenya, few nematode studies have been conducted, although the main commercial pineapple producer has sole dispensation to use Telone II (1,3-Dichloropropene) indicating the magnitude of the nematode problem. This study was conducted with the aim to investigate the population densities and diversity of nematodes in two commercial plantations with two contrasting management practices. We additionally assessed the influence of crop age and compared this with nearby smallholder pineapple production systems. Soil and root samples were collected from fields of different ages in each commercial plantation and from 29 smallholder fields. A total of 18 genera were associated with pineapple, with a relatively greater diversity found in smallholder than commercial farms. The most prevalent genus was Meloidogyne spp. (M. javanica) followed by Helicotylenchus spp., Tylenchus spp. and Aphelenchoides spp. PPN densities were higher in relatively older fields of 24 and 36 months than from fallow and 3-month-old fields. Regression analysis additionally demonstrated the rise of PPN densities with age of pineapple fields, especially Meloidogyne spp., while free-living nematode densities declined. This study provides an indication of the high level of PPN infection in pineapple in Kenya, which would constitute an important factor contributing to low yields. The study confirms an obvious need for pineapple producers to control PPN to improve crop yields.

scholarly journals KARAKTERISTIK KOMUNITAS NEMATODA DI PADANG GOLF SUKARAME (PGS) BANDAR LAMPUNG

2007 ◽  
Vol 7 (2) ◽  
pp. 80-90
Author(s):  
I Gede Swibawa ◽  
Titik Nur Aeny
Keyword(s):  
Plant Protection ◽  
Nematode Community ◽  
Golf Course ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Free Living ◽  
Important Pest ◽  
Abundance And Diversity ◽  
Green Collar ◽  
Plant Parasitic

ABSTRACTCharacteristic of  Nematodes Community at PGS Golf Course Bandar Lampung. Golf course is a unique ecosystem where plant parasitic nematodes inhabit and become  important pest because they reduce the quality of the grass.  The pest problems on golf course can be indicated by its characteristics of nematode community.  Survey on nematodes community at PGS Golf Course Bandar Lampung was conducted from March to December 2004.  The objective was to study the characteristics of nematode community in the part of golf courses hole (green, collar, apron, and fairway).  Soil samples were taken from five holes each of it consists of green, collar, apron, and fairway, respectiveley.  Nematodes extraction was done in Laboratory of Arthropod Pest, Department of Plant Protection University of Lampung.   The result showed that at least 50 nematodes genera of 28 families inhabit PGS. The number of plant parasitic nematode genera was higher than the free-living one.  The characteristic of nematodes community on green and collar was different than on faiway. Nematode abundance and diversity on green and collar were higher than on fairway.  Based on abundance of nematode feeding group, maturity index of free-living nematodes (MI) and that of plant parasitic nematodes (PPI), green and collar part seemed to be more favorable to plant parasitic nematodes than free-living nematodes. The contrary happened for fairway.  Four most dominant genera of plant parasitic nematodes on PGS golf course were Helicotylenchus, Hoplolaimus, Criconemella, and Xiphinema.  

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