Effects of soil characteristics on the relationship between potato cyst nematodes and yield. II. Acidity (soil pH)

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

doi:10.1007/bf02357996

Cited by 5 publications

(5 citation statements)

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“…However, pH fluctuations resulting from amendments influence pathogens and disease development. Decreasing pH increases the availability of phosphorus, nitrogen, and aluminum ions and decreases potato cyst nematode, brown rot, and common scab damages, respectively (Mulder et al 1997;Michel and Mew 1998;Ruijter and Haverkort 1999;Mizuno et al 2003). On the contrary, addition of urea in soil induces a very large increase in pH and a good control of Synchitrium endobioticum, the fungal pathogen causing wart (Hampson 1985).…”

Section: Soil Phmentioning

confidence: 94%

Potato soil-borne diseases. A review

Fiers¹,

Edel-Hermann²,

Chatot³

et al. 2011

Agron. Sustain. Dev.

148

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Potato crop is the fourth main food crop in the world and it will certainly feed a big part of the global population in the next years. The economical outlets for this crop are great; however, numerous diseases either soil-or airborne can cause huge losses in the production. Worldwide, about 40 soil-borne diseases affect potato and cause severe damages especially on tubers, the economically most important part of the plant. The occurrence and development of soilborne diseases depend on very diverse factors affecting either the pathogen or the plant. Favorable conditions for potato diseases development are frequently the same as the conditions needed for potato growth: temperature between 10°C and 25°C, high humidity, medium pH, etc. Adapted cultural practices such as a rotation longer than 4 years, appropriate fertilization and water management, an adapted delay between haulm killing and harvest, and dry and cool conditions for tuber storage are good ways to control potato diseases. In most cases, potato pathogens develop specific survival forms, dissemination ways and host penetration methods. The genetic variability of the pathogens implies the use of adapted diagnostic and control methods. Decision support systems developed to predict yield losses allow choosing good control methods such as the use of healthy seeds, adapted pesticides, cultural practices, and biological control agents for each potato disease. The complexity of the interactions between a pathogen and its host, influenced by biotic and abiotic factors of the environment, make the control of the diseases often very difficult. However, deep knowledge of pathosystems allows setting up integrated pest management systems allowing the production of healthy and good quality potatoes.

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Section: Soil Phmentioning

confidence: 94%

Potato soil-borne diseases. A review

Fiers¹,

Edel-Hermann²,

Chatot³

et al. 2011

Agron. Sustain. Dev.

148

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“…De Ruijter & Haverkort (1999) concluded that a high soil pH reduced growth mainly by reducing the availability of phosphate. At high soil pH, increased concentrations of calcium result in increased phosphorus fixation, but Haverkort et al (1993) and Mulder et al (1997) observed that yield losses of potato due to PCN increased more than could be expected from the increase in soil pH, although this interaction did not occur for all cultivars. In the current study, the interaction between soil pH and PCN soil infestation was only obvious for root weight of S. nigrum.…”

Section: Discussionmentioning

confidence: 92%

“…Yields of both S. sisymbriifolium and S. nigrum were lower at a high than at a low soil pH. Yield of potato also decreases with increasing soil pH (Mulder, et al, 1997). De Ruijter & Haverkort (1999) concluded that a high soil pH reduced growth mainly by reducing the availability of phosphate.…”

Section: Discussionmentioning

confidence: 99%

“…Reduced shoot growth will diminish ability to compete with weeds. Haverkort, Mulder & Van der Waart (1993) and Mulder, Van der Wal, Velema & Roosjen (1997) showed that tolerance of PCN by potato genotypes decreased markedly with increasing soil pH. Increased plant densities provide increased root densities in soil in the period immediately after emergence of plants and may dilute the number of second stage juveniles per g roots, thereby compensating for intolerance of crops.…”

Section: Introductionmentioning

confidence: 99%

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Growth and development of plants with potential for use as trap crops for potato cyst nematodes and their effects on the numbers of juveniles in cysts

Schölte¹

2000

Annals of Applied Biology

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Growth and development of three plant accessions with potential for use as trap crops for potato cyst nematodes (PCN), Solanum sisymbriifolium and two varieties of S. nigrum, were studied under 12 h and 17 h photoperiods. In pot experiments, rate of plant emergence, plant height, and shoot and root mass were greater for the S. nigrum varieties 90-4750-188 and 88-4750-061 than for S. sisymbriifolium and markedly greater than for a S. nigrum variety found as a weed of arable fields in The Netherlands. However, the last mentioned S. nigrum variety produced the most berries. Plant height and shoot weight of all the S. nigrum varieties were greater under the longer photoperiod, whereas the root mass was hardly affected. Plant height and shoot weight of S. sisymbriifolium also were greater under the longer photoperiod but the root weight was less. Under field conditions, with sowing dates from the end of March to mid August, S. sisymbriifolium and S. nigrum 90-4750-188 grew better than S. nigrum 88-4750-061. In contrast to S. nigrum, S. sisymbriifolium appeared resistant to night frosts in autumn. The stubbles of both S. sisymbriifolium and S. nigrum showed good regrowth after cutting the plants 5 or 10 cm above the soil surface 11 wk after sowing. In a pot experiment, all the plant accessions strongly reduced the numbers of juveniles in cysts compared with flax. Tolerance to Globodera rostochiensis of S. sisymbriifolium and S. nigrum 90-4750-188 was investigated in pot experiments under glasshouse conditions in sandy soil at pH 4.8 and 6.0. At soil infestation levels ranging from 0 to 56 juveniles ml -1 soil, S. sisymbriifolium appeared much more tolerant than S. nigrum 90-4750-188. Shoot yield of S. nigrum decreased markedly with increasing soil infestation and root weight also decreased, except at pH 4.8 and light infestation levels. Both S. sisymbriifolium and S. nigrum grew better at soil pH 4.8 than 6.0. The proportion of lateral roots in the total root mass increased in both species with increasing PCN infestation and soil pH. However, although the proportion of lateral roots in plants grown at soil pH 6.0 was greater at PCN infestations up to 14 juveniles ml -1 soil, the proportion of laterals in S. nigrum was considerably less at PCN infestations of 56 juveniles ml -1 soil. The proportion of PCN juveniles hatching was similar for the two species and decreased slightly with increasing initial nematode population densities.

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“…Plant-parasitic nematodes (PPN) are regarded minor pests of potato in the country, although they attack a wide range of agricultural crops and consequently constrain an already erratic global food security ( Jones et al, 2013 ). Plant-parasitic nematodes often go undetected because symptoms associated with their infestations resemble those caused by other biotic and abiotic factors ( Mulder et al, 1997 ). Until 2015, root-knot nematodes ( Meloidogyne spp., RKN) were the only economically important PPN associated with potato in Kenya ( Were et al, 2013 ).…”

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confidence: 99%

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. II. Acidity (soil pH)

Cited by 5 publications

References 1 publication

Potato soil-borne diseases. A review

Potato soil-borne diseases. A review

Growth and development of plants with potential for use as trap crops for potato cyst nematodes and their effects on the numbers of juveniles in cysts

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

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