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  • 1
    Online Resource
    Online Resource
    Nematodes associated with East African Highland cooking bananas and cv. Pisang Awak (Musa spp.) in Central Uganda
    Brill ; 2001
    In:  Nematology Vol. 3, No. 6 ( 2001), p. 535-541
    Details
    In: Nematology, Brill, Vol. 3, No. 6 ( 2001), p. 535-541
    Abstract: A survey was conducted at 17 sites in Central Uganda. Suckers were detached from East African Highland cooking bananas (Musa spp., AAA-group) and the cultivar Pisang Awak (Musa spp., ABB-group), and assessed for nematode population densities and root damage. The frequency of occurrence on both Musa groups was Helicotylenchus multicinctus 88%, Radopholus similis 74% and Pratylenchus goodeyi 50%. Helicotylenchus multicinctus and R. similis densities were higher (P ≤ 0.05) on Highland cooking bananas compared to Pisang Awak, while P. goodeyi densities did not differ significantly between the groups. Helicotylenchus multicinctus and R. similis were observed to be the major pests of Highland cooking bananas in Central Uganda, causing extensive root death. Radopholus similis may be the more important of the two, as it was also highly associated with root necrosis.
    Type of Medium: Online Resource
    ISSN: 1388-5545 , 1568-5411
    URL: Article
    DOI: 10.1163/156854101753389149
    Language: Unknown
    Publisher: Brill
    Publication Date: 2001
    detail.hit.zdb_id: 2019332-4
    SSG: 12
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  • 2
    Online Resource
    Online Resource
    Effect of nematode infection and damage on the root system and plant growth of three Musa cultivars commonly grown in Uganda
    Brill ; 2006
    In:  Nematology Vol. 8, No. 2 ( 2006), p. 177-189
    Details
    In: Nematology, Brill, Vol. 8, No. 2 ( 2006), p. 177-189
    Abstract: Banana production in East Africa is threatened by declining yields partly caused by plant-parasitic nematodes. Attempts to ameliorate this damage are hampered by a lack of information on the characteristics of the root systems of healthy and nematode infested roots of commonly grown banana cultivars. An experiment in hydroponic culture, where healthy root systems were established, demonstrated that there were differences in number, size and distribution of primary, secondary and tertiary roots among the cultivars Nabusa, Pisang Awak and Sukali Ndizi. Field experiments carried out at three sites in Uganda showed that nematode damage on the same cultivars increased the number of primary roots and root bases, either increased or decreased root length depending on the cultivar or nematode species involved, but always decreased root length density. Root number and size are probably critical factors in determining plant tolerance to nematodes. Our findings should help plant breeding programmes, which must establish those selection criteria that are most likely to reduce the debilitating effects of nematode damage.
    Type of Medium: Online Resource
    ISSN: 1388-5545 , 1568-5411
    URL: Article
    DOI: 10.1163/156854106777998764
    Language: Unknown
    Publisher: Brill
    Publication Date: 2006
    detail.hit.zdb_id: 2019332-4
    SSG: 12
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  • 3
    Online Resource
    Online Resource
    Micro-plot evaluation of the yield reduction potential of Pratylenchus coffeae, Helicotylenchus multicinctus and Meloidogyne javanica on plantain cv. Apantu-pa (Musa spp., AAB-group) in Ghana
    Brill ; 2004
    In:  Nematology Vol. 6, No. 3 ( 2004), p. 455-462
    Details
    In: Nematology, Brill, Vol. 6, No. 3 ( 2004), p. 455-462
    Abstract: The damage potential of the plant-parasitic nematodes Pratylenchus coffeae, Helicotylenchus multicinctus and Meloidogyne javanica, was assessed on plantain (Musa spp., AAB-group) cv. Apantu-pa in microplots in Ghana. Hot water treated suckers, planted in 3 l plastic bags containing sterilised soil, were inoculated 1 month after planting with a single nematode species or a nematode species mixture; controls were not inoculated. The initial single species inocula consisted of 1000 or 10 000 nematodes per plant, whilst the initial species mixture inoculum consisted of 3000 nematodes of each nematode species per plant. Two months after planting, the suckers were transplanted into micro-plots (0.7 m3 concrete containers filled with sterilised soil). Inoculation of single species at either density resulted in lower (P ≤ 0.05) bunch weights of the mother plants (between 23-33% lower) than the noninoculated control plants, whilst bunch weights of plants inoculated with the species mixture were 18% lower (P ≤ 0.05). Nematode damage indices (% dead roots, root necrosis and sucker corm lesions) were more severe in P. coffeae inoculated treatments. There was no difference between inoculated treatments and the control in plant growth parameters (days to flowering, number of standing leaves, height, girth, number of suckers) of the mother plant at flowering and harvest. Plant toppling occurred only in, and in all, treatments involving P. coffeae, with up to 60% of bunch-carrying plants toppled in the most affected treatment (inoculation of 10 000 nematodes per plant). Therefore, projected yields per ha were low in P. coffeae inoculated treatments: 41, 73 and 65% lower than the control for inoculation of 1000, 10 000 and 3000 (in species mixture) individuals, respectively. Inoculation with 10 000 H. multicinctus or M. javanica per plant resulted in yield losses of 26 and 30%, respectively. This study suggests that P. coffeae is likely to be the most important biotic constraint to plantain production in Ghana. Nematodes have been viewed as the major biotic constraint to plantain production in the country, and P. coffeae is the most widespread and abundant nematode species on plantain in Ghana. The results further demonstrate that H. multicinctus and M. javanica can cause considerable yield reduction in plantain.
    Type of Medium: Online Resource
    ISSN: 1388-5545 , 1568-5411
    URL: Article
    DOI: 10.1163/1568541042360537
    Language: Unknown
    Publisher: Brill
    Publication Date: 2004
    detail.hit.zdb_id: 2019332-4
    SSG: 12
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  • 4
    Online Resource
    Online Resource
    Recolonisation by nematodes of hot water treated cooking banana planting material in Uganda
    Brill ; 2004
    In:  Nematology Vol. 6, No. 2 ( 2004), p. 215-221
    Details
    In: Nematology, Brill, Vol. 6, No. 2 ( 2004), p. 215-221
    Abstract: In East Africa, the cooking bananas (Musa spp., AAA group, subgroup Matoke) are the major food crop. Yields are decreasing due to increasing damage caused by a complex of pests and diseases, including plant-parasitic nematodes. Planting of infected material is the principle means of dispersal for these nematodes. An option to control the nematodes in planting material is hot water treatment but the benefits depend on the rate of recolonisation. Therefore, on-farm trials were carried out at five localities representing Musa production systems in Uganda. Hot water treatment of planting material slowed down build-up of Radpholus similis at least until 30 months after planting. This was not only the case for the treated mother plants but also for the suckers that developed from these mother plants. A similar trend was observed for Helicotylenchus multicinctus. Hot water treatment also slowed down the build-up of Pratylenchus goodeyi but this effect was less pronounced.
    Type of Medium: Online Resource
    ISSN: 1388-5545 , 1568-5411
    URL: Article
    DOI: 10.1163/1568541041217997
    Language: Unknown
    Publisher: Brill
    Publication Date: 2004
    detail.hit.zdb_id: 2019332-4
    SSG: 12
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  • 5
    Online Resource
    Online Resource
    Plant parasitic nematodes associated with plantain (Musa spp., AAB-group) in southern Nigeria and their relative importance compared to other biotic constraints
    Brill ; 2001
    In:  Nematology Vol. 3, No. 5 ( 2001), p. 423-436
    Details
    In: Nematology, Brill, Vol. 3, No. 5 ( 2001), p. 423-436
    Abstract: The predominant nematode species found on plantain in southern Nigeria was Helicotylenchus multicinctus which occurred at all 68 sites sampled. Hoplolaimus pararobustus, Pratylenchus coffeae and Radopholus similis were found at 64, 50 and 46% of the sites, respectively, while Meloidogyne spp. second stage juveniles were found at 68% of the sites. Other nematode species occurred at less than 5% of the sites and included Helicotylenchus dihystera, P. zeae, P. brachyurus, Rotylenchulus reniformis, Scutellonema and Criconemoides spp. H. multicinctus and P.coffeae occurred at high densities (on average about 10 500 and 3500 nematodes/100 g fresh root weight, respectively), compared to the other species. P.coffeae was more common in the west and mid-west of southern Nigeria, while R. similis was more common in the east. Factors, derived from a principal component analysis of observations of damage caused by nematodes, the banana weevil Cosmopolites sordidus and the fungus Mycosphaerella fijiensis, the cause of Black Sigatoka, were related to plant growth observations. The results suggest that P.coffeae followed by R. similis are the major biotic constraints of plantain production in southern Nigeria. Higher losses are anticipated by these plant parasitic nematodes than by either M. fijienis or C. sordidus.
    Type of Medium: Online Resource
    ISSN: 1388-5545 , 1568-5411
    URL: Article
    DOI: 10.1163/156854101753250755
    Language: Unknown
    Publisher: Brill
    Publication Date: 2001
    detail.hit.zdb_id: 2019332-4
    SSG: 12
    Location Call Number Limitation Availability
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  • 6
    Online Resource
    Online Resource
    Effects of nematode infection and mulching on the yield of plantain (Musa spp., AAB-group) ratoon crops and plantation longevity in southeastern Nigeria
    Brill ; 2005
    In:  Nematology Vol. 7, No. 4 ( 2005), p. 531-541
    Details
    In: Nematology, Brill, Vol. 7, No. 4 ( 2005), p. 531-541
    Abstract: The effects of nematode infection and mulching on plantain cv. Agbagba (Musa spp., AAB-group, false horn) yield and plantation longevity were examined in a field experiment at the High Rainfall Station of the International Institute of Tropical Agriculture (IITA) at Onne in southeastern Nigeria. The 2nd, 3rd and 4th crop cycles (1st, 2nd and 3rd ratoon, respectively) following the plant crop cycle (mother crop) were examined in nematode inoculated or non-inoculated and mulched or non-mulched treatments. Nematodes (Radopholus similis, Helicotylenchus multicinctus and, to a lesser extent, Helicotylenchus dihystera, Hoplolaimus pararobustus and Meloidogyne spp.) were inoculated at planting of the mother plant, but were also present in relatively high population densities in the non-inoculated treatments at harvest of the 1st crop cycle. Plants inoculated with nematodes failed to reach harvest and neither did plants in the non-inoculated non-mulched treatments in any ratoon. Only non-inoculated mulched plants reached harvest, producing 0.85, 1.22 and 0.2 Mg ha−1, respectively in the 1st, 2nd and 3rd ratoon, taking toppled, broken and dead plants into consideration. Mulched plants were larger, had more suckers, survived longer and had healthier root systems compared with non-mulched plants. Damage to roots was greater in the inoculated plants compared with the non-inoculated plants for the 1st and 2nd ratoons but not for the 3rd ratoon. Radopholus similis was most strongly associated with root damage (percentage root necrosis and dead roots), although H. multicinctus population densities were also positively correlated with percentage root necrosis. At flowering of the 1st ratoon, 71% of the inoculated non-mulched plants were dead compared with only 1% of the non-inoculated mulched plants. Helicotylenchus multicinctus remained the most abundant nematode throughout the experiment. Together with R. similis, it comprised over 95% of the plant-parasitic nematode population.
    Type of Medium: Online Resource
    ISSN: 1388-5545 , 1568-5411
    URL: Article
    DOI: 10.1163/156854105774384796
    Language: Unknown
    Publisher: Brill
    Publication Date: 2005
    detail.hit.zdb_id: 2019332-4
    SSG: 12
    Location Call Number Limitation Availability
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    Online Resource
  • 7
    Online Resource
    Online Resource
    Micro-plot evaluation of the yield reduction potential of Pratylenchus coffeae, Helicotylenchus multicinctus and Meloidogyne javanica on plantain cv. Apantu-pa (Musa spp., AAB-group) in Ghana
    Springer Science and Business Media LLC ; 2004
    In:  Nematology Vol. 6, No. 3 ( 2004-05), p. 455-462
    Details
    In: Nematology, Springer Science and Business Media LLC, Vol. 6, No. 3 ( 2004-05), p. 455-462
    Type of Medium: Online Resource
    ISSN: 1388-5545
    URL: Article
    DOI: 10.1023/B:NEMT.0000046915.35372.0a
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2004
    detail.hit.zdb_id: 2019332-4
    SSG: 12
    Location Call Number Limitation Availability
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