Hatching of <i>Globodera pallida</i> juveniles by diffusate of potato genotypes, differing in tolerance to <i>G. pallida</i>

Arntzen, F.K.; Visser, J.H.M.; Hoogendoorn, J.

doi:10.1111/j.1744-7348.1993.tb04075.x

Cited by 12 publications

(7 citation statements)

References 18 publications

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“…The narrow host range of Globodera species (Whitehead & Turner, ) suggests that crop rotation could be effective for their control. However, G. pallida hatches only in the presence of a suitable host or closely related non‐host that produces an appropriate chemical hatching factor (Arntzen et al , ; Byrne et al , ; Schenk, ; Byrne et al , ; Farnier et al , ). Crop rotation is used as a control measure for PCN in Europe and elsewhere (LaMondia & Brodie, ; LaMondia, ; Trudgill et al , , ).…”

Section: Introductionmentioning

confidence: 99%

Effect of the trap cropSolanum sisymbriifoliumand two biocontrol fungi on reproduction of the potato cyst nematode,Globodera pallida

Dandurand

Knudsen

2016

Ann Appl Biol

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The potato cyst nematode, Globodera pallida, is one of the most important pests of potato worldwide. Owing to regulatory considerations and potential environmental impact, control options for this nematode are becoming increasingly limited. Solanum sisymbriifolium and biological control agents offer viable alternative options for controlling G. pallida. Therefore, experiments were conducted to determine the effect of the nematode trap crop S. sisymbriifolium, alone or in combination with the biocontrol agents Trichoderma harzianum or Plectosphaerella cucumerina, on population decline of G. pallida. Experiments were conducted for three different 'cropping systems': potato (Solanum tuberosum), S. sisymbriifolium, or soil only (fallow), each followed by a potato crop. Soil was amended with P. cucumerina, T. harzianum or left unamended, and then infested with nematodes at a rate of five eggs g −1 of soil. After 16 weeks in the greenhouse, plants were removed and the soil containing cysts was refrigerated at 4 ∘ C for 8 weeks, and then planted to potato. Cysts of G. pallida were counted after an additional 16-week period. The P f /P i of G. pallida was significantly reduced by 99% in potato following S. sisymbriifolium compared to both the potato-following-fallow and the potato-following-potato treatments. Amendment of soil with T. harzianum significantly reduced P f /P i of G. pallida by 42-47% in the potato-following-potato but not in either the potato-after-fallow nor in the potato-after-S. sisymbriifolium cycles which supports evidence that the plant species may play a role in the biocontrol activity of this fungus. Addition of the fungus P. cucumerina resulted in a 64% decrease in P f /P i in the potato-following-fallow in one experiment, and an 88% decrease in P f /P i in potato-following-potato but the decrease in P f /P i was not consistent over all experiments. However, both biocontrol fungi resulted in lower numbers of progeny cysts after an initial 16-week incubation with potato. To look at the effect of varied population density of the nematode on efficacy of S. sisymbriifolium to reduce G. pallida populations, potato, S. sisymbriifolium, or barley were planted into soil infested with G. pallida at rates of 5, 20 or 40 eggs g −1 soil applied as cysts (20, 80 or 160 cysts pot −1 ). After 16 weeks, numbers of cysts produced in each treatment were determined for each infestation rate. No new cysts were recovered from either S. sisymbriifolium or barley treatments, confirming that neither plant is a host for G. pallida. High numbers of cysts were recovered with potato. Soil from each treatment (containing original cysts and newly-formed cysts when present) were then planted with potato. After an additional 16 weeks, few cysts were found in the potato-after-S. sisymbriifolium Trap crop and biocontrol agent effects on Globodera pallida treatments regardless of initial infestation rate. When potato followed barley, numbers of cysts were similar to those found after a single cycle of potato, indicating that the ba...

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Section: Introductionmentioning

confidence: 99%

Effect of the trap cropSolanum sisymbriifoliumand two biocontrol fungi on reproduction of the potato cyst nematode,Globodera pallida

Dandurand

Knudsen

2016

Ann Appl Biol

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“…Despite the finding of Rawsthorne & Brodie (1986), our finding of weaker hatching of the resistant cvs could not be related to their root weight (data not presented) since root weights were similar in all cvs. Arntzen et al, (1993) have proposed variation in hatching may be caused by different amounts of hatching factors in diffusates of these cultivars.…”

Section: Discussionmentioning

confidence: 99%

“…Some tolerant genotypes/cultivars have induced poor hatch (Evans, 1983;Arntzen et al, 1993). If some cvs induce hatch poorly in the field, they might be invaded less by G. rostochiensis, and thereby may suffer less damage and tolerate nematode attack better (Evans, 1983).…”

Section: Discussionmentioning

confidence: 99%

Comparison of development of Globodera rostochiensis in four potato cultivars

Fatemy¹,

Ghasemi²

2018

Pak. J. Nematol.

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Developmental stages of juveniles of G. rostochiensis Ro1 were studied in the susceptible cv. Marfona and in the resistant cvs Agria, Satina and Banba in glass-house conditions. The hatching response of the nematodes to root diffusates of these cvs was also investigated. Disinfected cysts of G. rostochiensis were placed in root diffusates and the numbers of hatched second stage juveniles (J 2 ) were counted weekly over a 6-week period. Pots were planted with a single sprout of each cv. and the soil was inoculated with a suspension of 400 freshly hatched J 2 . There was a significant difference in the numbers of J 2 that had entered the roots as well as a delay of 1-2 weeks in the rate of development of juveniles in the resistant compared to the susceptible cvs. Overall, 44%, 23%, 10% and 4% of inoculated J 2 were found in the roots of susceptible Marfona, and resistant Satina, Agria and Banba cultivars, respectively. The first J 3 appeared in roots one week after J 2 entered the roots in Marfona and Satina, but after 2 weeks for the other cvs; the first J 4 was found 14 and 21 days after J 2 entry in the roots of susceptible and resistant cvs respectively. The numbers of white females found on the roots were fewer than 5 or none on roots of the potatoes resistant to pathotype Ro1. When cysts were exposed to root diffusates, 74% of J 2 hatched in Marfona diffusate as compared to 50% in Agria, 43% in Satina and 39% in Banba diffusates.

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“…visible three days after inoculation on inoculated roots (Arntzen, Visser & Hoogendoorn, 1993a) and Cara not resistant. The rate at which 13 genotypes induced hatching had been determined previously, by exposing cysts in uitro to root diffusate of these genotypes (Arntzen et al, 19936). The hatching curves were analysed with non-linear regression, using a three parameter logistic model.…”

Section: Methodsmentioning

confidence: 99%

The effect of the potato cyst nematode Globodera pallida on in vitro root growth of potato genotypes, differing in tolerance

Arntzen¹,

Visser²,

Hoogendoorn³

1994

Annals of Applied Biology

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Roots of eighteen potato genotypes, differing in tolerance of G. pallida, were grown from tuberpieces on agar in Petri dishes. Juveniles of G. pallida were inoculated directly onto root tips. Root length was measured at various times after inoculation. Inoculation reduced root growth within one day. At later stages, genotypes differed strongly in growth of inoculated roots. Between four and seven days after inoculation, growth of inoculated roots was not significantly correlated with growth of untreated roots, and was only poorly correlated with tolerance assessed in the greenhouse or in the field. However, multiple regression analysis revealed that the tolerance of the tested genotypes was associated with both the rate at which they induced hatching and the growth of roots after inoculation. The combination of these two variables accounted for high percentages explained variance.

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Hatching of Globodera pallida juveniles by diffusate of potato genotypes, differing in tolerance to G. pallida

Cited by 12 publications

References 18 publications

Effect of the trap cropSolanum sisymbriifoliumand two biocontrol fungi on reproduction of the potato cyst nematode,Globodera pallida

Effect of the trap cropSolanum sisymbriifoliumand two biocontrol fungi on reproduction of the potato cyst nematode,Globodera pallida

Comparison of development of Globodera rostochiensis in four potato cultivars

The effect of the potato cyst nematode Globodera pallida on in vitro root growth of potato genotypes, differing in tolerance

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