Categorisation of 10 sweet potato (<i>Ipomoea batatas</i>(L.) Lam.) varieties for resistance to<i>Meloidogyne</i>spp. in organic field

Atungwu, J. J.; Ozuzu, Lawrence; Tijjani, Ibrahim

doi:10.1080/03235408.2012.738520

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…are considered the most serious pest and have the ability to seriously reduce the yield and quality of sweetpotato. They cause chlorosis of the leaves and produce root galls which then leave the roots susceptible to secondary infection during the growing period or during storage (Atungwu et al, 2012;Clark et al, 2013).…”

Section: Plant Parasitic Nematodesmentioning

confidence: 99%

“…An extended fallow period can reduce levels of nematodes, however, this option is not always available for smallholder farmers, so the development of resistant varieties is the best option. There are numerous varieties showing tolerance or resistance to nematodes across PNG and the Pacific, however in other parts of the world resistance is not reported as commonly (Kokoa, 2001;Atungwu et al, 2012;Suzuki et al, 2012). Clark et al (2013) describes over 30 diseases of sweetpotato caused by a greater number of pathogens among which are at least 30 known sweetpotato viruses.…”

Section: Plant Parasitic Nematodesmentioning

confidence: 99%

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Invertebrate pests and diseases of sweetpotato (Ipomoea batatas): a review and identification of research priorities for smallholder production

Johnson

Gurr

2016

Ann Appl Biol

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Sweetpotato has been the subject of little research worldwide compared with other major crop staples, and this is especially so for less developed countries where sweetpotato is critical for food security. This review synthesises information on plant protection issues that affect smallholder sweetpotato farmers in less developed countries to identify major issues and suggest research priorities. Though the pests and diseases of sweetpotato in less developed countries are largely common to industrialised systems, their relative importance differs and losses tend to be more severe as a result of differing agronomic practices and relative unavailability of management options and technical support that are important in developed countries. Smallholders are heavily reliant on cultural practices such as traditional forms of biological control using ants and livestock, fallowing and composting (sometimes with plant materials having biocidal properties). Crop protection methods that have been developed for use in sweetpotato production in developed countries, such as pathogen-tested planting material, early maturing varieties, pheromone trapping and pesticides are less accessible to, and relevant for, smallholders. Smallholders also typically harvest a given crop progressively which extends the period over which storage roots are potentially vulnerable to attack but reduces the risk of post-harvest losses. Human population growth in developing countries is leading to an increase in cropping intensity with shorter fallow periods and more years of continuous crops. This has the dual effect of depleting soil nutrients and increasing the potential for pest and pathogen build-up. Associated with this, the adoption of strategies to manage crop nutrition, such as not burning crop residues, promote carryover of pests and pathogen inocula. As a consequence of these factors, sweetpotato yield losses from diseases, especially viruses, and pests, particularly weevils, can be high. Climate change is likely to result in more frequent drought and this will increase losses caused by sweetpotato weevils that are favoured by dry conditions. This review of sweetpotato pests and their management options concludes with suggestions for some future research priorities including the combination of traditional practices that have pest management outcomes with relevant practices from industrial production that are able to be transferred or modified for use in smallholder production. Increased technical support for decision making and diagnostics, including molecular approaches that have scope for field use, will be important in reducing the burden imposed by biotic threats to this important global crop.

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Section: Plant Parasitic Nematodesmentioning

confidence: 99%

Section: Plant Parasitic Nematodesmentioning

confidence: 99%

Invertebrate pests and diseases of sweetpotato (Ipomoea batatas): a review and identification of research priorities for smallholder production

Johnson

Gurr

2016

Ann Appl Biol

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“…According to Noble (2011) and Zachow et al (2011), this fungus attack is more severe in sandy soils because the S. rolfsii fungus requires aerobic oxygen (O2), and in soil conditions with low nitrogen content and high temperatures. Therefore, another alternative is needed to control the stem rot disease such as using fungicides (Bhuiyan et al, 2012;El-Mohamedy et al, 2014), organic amendments (Hadar, 2011;Lahre et al, 2012;Paramasivan et al, 2013), soil solarization (Raj and Sharma, 2009;Lee et al, 2016), botanical pesticides (Amin et al, 29013), rhizobacteria (Hapsah, 2019), and bio-agents (Rakh et al, 2011;Lahre et al, 2012). Each method has its advantages and disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Application of Bio P60 and Bio T10 Alone or in Combination Against Stem Rot of Pakcoy

2019

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Application of Bio P60 and Bio T10 alone or in combination in suppressing stem rot of pakcoy and on pakcoy growth has been demonstrated. The research was carried out at the Plant Protection Laboratory and Screen House, Faculty of Agriculture, Jenderal Soedirman University. A split-plot design was used with application time (before and after inoculation of Sclerotium rolfsii) as main plot and Bio P60, Bio T10, and Bio P60 + Bio T10) as sub-plot. Observed variables were incubation period, disease intensity, crop height, number of leaves, and crop fresh weight. Results of the research showed that single and combined application of Bio T10 and Bio P60 did not differ in the suppression of stem-end rot in pakcoy. The combination of Bio T10 + Bio P60 was able to control the disease by delaying the incubation period and suppressing the disease intensity respectively by 37.48-39.16% and 54.77-6191% compared to controls. Combined Bio T10 + Bio P60 was able to improve plant height, number of leaves, and fresh weight of plants as 29.99-46.62, 24.39-35.07, and 71,17%, respectively, compared to controls. The results of this study suggest that the raw secondary metabolites of Bio P60 and Bio T10 either alone or in combination could be applied for the prevention or treatment of the diseases in pakcoy.

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Influence of rock dust-based soil re-mineralisation on root-knot disease of organic watermelon plants

Atungwu

Oladeji

Aiyelaagbe

et al. 2013

Archives Of Phytopathology And Plant Protection

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Deplorable soil fertility characterising resource-poor agrarian communities remain a major constraint for sustainable global food security. Re-mineralisation through application of rock dust encourages maintainable productivity of degraded soils. This study was planned to appraise the effect of rock dust on root-knot disease of Citrullus lanatus caused by Meloidogyne incognita (Mi). The experiment was laid out in Randomised Complete Block Design with three replications. Soil and root populations of the nematode were estimated and galling damage of the crop was diagnosed and censured at 60 days after inoculation. Additional data were collected on vine length, number of leaves, days to 50% flowering and dry matter content. Data collected were subjected to analysis of variance and the means were separated using least significant difference. The treated watermelon plants were low in rootknot disease, significantly reduced Mi nematode populations and flowered far much earlier ( p = 0.05) than the untreated organic watermelon plants.

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Categorisation of 10 sweet potato (Ipomoea batatas(L.) Lam.) varieties for resistance toMeloidogynespp. in organic field

Cited by 3 publications

References 3 publications

Invertebrate pests and diseases of sweetpotato (Ipomoea batatas): a review and identification of research priorities for smallholder production

Invertebrate pests and diseases of sweetpotato (Ipomoea batatas): a review and identification of research priorities for smallholder production

Application of Bio P60 and Bio T10 Alone or in Combination Against Stem Rot of Pakcoy

Influence of rock dust-based soil re-mineralisation on root-knot disease of organic watermelon plants

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