Effects of soil characteristics on the relationship between potato cyst nematodes and yield. I. Water retention

Mulder, A.; Wal, A. F. van der; Velema, R. A. J.

doi:10.1007/bf02357995

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…For example, a study of Globodera spp. on potato found that percentage yield loss did not change as yield potential changed (Mulder et al, 1997), but the yield potential and crop loss data were generated at different times in fields with different soil types. Soil type likely affects both yield potential and percentage yield suppression, so data combined from a range of soil types may not indicate a clear or consistent relationship between yield potential and percentage loss.…”

Section: Discussionmentioning

confidence: 99%

Relationship between Yield Potential and Percentage Yield Suppression Caused by the Southern Root‐Knot Nematode in Cotton

Davis

May

2005

Crop Science

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been studied extensively (Cook et al., 1997;Ogallo et al., 1997;Robinson et al., 1999;Shepherd, 1974 Shepherd, , 1983 be-Currently available cotton (Gossypium hirsutum L.) cultivars supcause M. incognita causes more damage to cotton in the port significant reproduction of the southern root-knot nematode USA than any other pathogen (National Cotton Council [Meloidogyne incognita (Kofoid & White) Chitwood], but they have not been evaluated for differing levels of yield suppression (tolerance) of America disease loss estimates, www.cotton.org/tech/ to this nematode. If nematode tolerant (low yield suppression) but pest/index.cfm [verified 14 June 2005]). In contrast, tolsusceptible (high nematode reproduction) cotton cultivars can be idenerance to M. incognita in cotton is poorly documented tified, they could be grown rather than intolerant cultivars to reduce and has received relatively little study (Davis and May, yield loss. The objective of this study was to evaluate a collection of 2003). M. incognita-susceptible cotton cultivars for tolerance to parasitismResistance and tolerance to nematodes can be exby this nematode. The yield potential and percentage yield loss to pressed independently in potato (Solanum tuberosum M. incognita were measured in 12 genotypes in 2002 and 2003 by L.) (Arntzen et al., 1994; Evans and Haydock, 1990; comparing yields in 1,3-dichloropropene-fumigated and nonfumi- Trudgill and Coates, 1983) and soybean [Glycine max gated plots. The percentage yield suppression caused by M. incognita (L.) Merr.] (Boerma and Hussey, 1984, 1992). It is not differed among cotton genotypes in both 2002 and 2003. Yield suppression ranged from 18.0 to 47.3% in 2002 and from 8.5 to 35.7% in 2003.

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Section: Discussionmentioning

confidence: 99%

Relationship between Yield Potential and Percentage Yield Suppression Caused by the Southern Root‐Knot Nematode in Cotton

Davis

May

2005

Crop Science

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Economic Impact from Unrestricted Spread of Potato Cyst Nematodes in Australia

Hodda¹,

Cook²

2009

Phytopathology®

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Potato cyst nematodes (PCN) (Globodera spp.) are quarantine pests with serious potential economic consequences. Recent new detections in Australia, Canada, and the United States have focussed attention on the consequences of spread and economic justifications for alternative responses. Here, a full assessment of the economic impact of PCN spread from a small initial incursion is presented. Models linking spread, population growth, and economic impact are combined to estimate costs of spread without restriction in Australia. Because the characteristics of the Australian PCN populations are currently unknown, the known ranges of parameters were used to obtain cost scenarios, an approach which makes the model predictions applicable generally. Our analysis indicates that mean annual costs associated with spread of PCN would increase rapidly initially, associated with increased testing. Costs would then increase more slowly to peak at over AUD$20 million per year approximately 10 years into the future. Afterward, this annual cost would decrease slightly due to discounting factors. Mean annual costs over 20 years were $18.7 million, with a 90% confidence interval between AUD$11.9 million and AUD$27.0 million. Thus, cumulative losses to Australian agriculture over 20 years may exceed $370 million without action to prevent spread of PCN and entry to new areas.

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Biology, pathotype, and virulence of Globodera rostochiensis populations from Kenya

Mwangi

Finckh

et al. 2021

Journal of Nematology

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The potato cyst nematodes (PCN), Globodera rostochiensis (Woll.) and G. pallida (Stone), are important pests of potato globally. Due to their extensive damage potential and the challenge of managing them, these nematodes are under strict regulations in many countries; however, despite these regulations, PCN continue to spread into new areas and countries. In Kenya, G. rostochiensis was first reported in 2015 and G. pallida was reported three years later, both in Nyandarua County. Research was conducted to characterize the biology, pathotype, and virulence of G. rostochiensis populations from Kenya in glasshouse and laboratory studies. The development of G. rostochiensis was assessed in roots of susceptible potato ‘Désirée’ and resistant ‘Laura’ carrying the H1 resistance gene. The ‘HAR1’ population from Kenya and ‘Ecosse’ from Germany were not able to produce females in the roots of the resistant potato ‘Laura’. The rate of root penetration by G. rostochiensis juveniles did not differ ( p > 0.05) between populations and cultivars. However, in the resistant cultivar, juveniles developed into males only. A total of 736 cumulative degree-days at 6°C base temperature (DD 6 ) were required by ‘HAR1’ to complete the life cycle on ‘Désirée’, whereas ‘Ecosse’ completed the life cycle within 645 DD 6 . The Kenyan populations lacked obligatory diapause and high numbers of juveniles hatched immediately after maturity. Consequently, the Kenyan populations had the potential to complete up to three reproduction cycles in less than a year. On selected potato cultivars, the populations from Kenya failed to reproduce on 10 out of 13 commercial cultivars tested. The 10 cultivars carried the H1 resistance gene, which suggests that the G. rostochiensis populations tested belong to the Ro1/4 pathotype group. The virulence of the G. rostochiensis populations from Kenya did not differ from that of the standard reference population ‘Ecosse’ and therefore can be effectively managed with the commercially available potato cultivars carrying the H1 resistance gene.

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Effects of soil characteristics on the relationship between potato cyst nematodes and yield. I. Water retention

Cited by 3 publications

References 8 publications

Relationship between Yield Potential and Percentage Yield Suppression Caused by the Southern Root‐Knot Nematode in Cotton

Relationship between Yield Potential and Percentage Yield Suppression Caused by the Southern Root‐Knot Nematode in Cotton

Economic Impact from Unrestricted Spread of Potato Cyst Nematodes in Australia

Biology, pathotype, and virulence of Globodera rostochiensis populations from Kenya

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