Role of Soil Microflora and<i>Pratylenchus penetrans</i>in an Apple Replant Disease

Jaffee, B. A.

doi:10.1094/phyto-72-247

Cited by 64 publications

(29 citation statements)

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“…This observation finds support in the study made by Jaffee et al (1982) who showed that 50 P. penetrans per 50 cm 3 of orchard soil could be the primary causal agent in ARD, although another non-pathogenic rhizosphere organisms may also be involved,…”

Section: Discussionsupporting

confidence: 75%

“…Recently, Vrain and Yorston (1987) showed that 54% of samples from Okanagan orchards having stunted trees also had levels higher than 50 P. penetrans per 50 cm 3, while 46% of the samples were below that level. The published data from other areas also support these observations (Hoestra and Oostenbrink, 1962;Jaffee and Mai, 1979;Jaffee et al, 1982). The pathogenicity of P. penetrans to apple and other fruit trees is well documented.…”

Section: Discussionmentioning

confidence: 57%

“…In various parts of the world, fungi such as Cylindrocarpon lucidum and Pythium species (Jaffee et al, 1982;Sewell, 1981), soil bacteria and actinomycetes have been implicated in ARD (Hoestra, 1968;Savory, 1981;Westcott et al, 1986). The combination of fungi and bacteria in soil did not affect the growth of apple seedlings (Table 3).…”

Section: Discussionmentioning

confidence: 97%

“…Nevertheless, because of the control obtained with soil fumigation and/or pasteurization, the cause of ARD is thought to be biotic * Contribution number 700. (Jaffee et al, 1982;Mai and Abawi, 1981;Slykhuis and Li, 1985). Sewell (1981) suggested pythiaceous fungi as the primary cause of ARD in England.…”

Section: Introductionmentioning

confidence: 99%

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Effects of nematodes, fungi and bacteria on the growth of young apple trees grown in apple replant disease soil

1992

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Growth, dry root weight of seedlings and root score of apple seedlings cv. McIntosh were reduced when soils were inoculated with Pratylenchus penetrans, Penicillium janthinellum, Constantinella terrestris, Trichoderma sp., and 4 strains of Bacillus subtilis. Trichoderma sp., and B-1 and B-26 strains of B. subtilis alone reduced plant growth but the combination of Trichoderma sp. + B. subtilis (B-l) and Trichoderma sp. + B. subtilis (B-26) increased plant height. Plant height, root weight and root score were significantly reduced when P. penetrans plus B. subtilis or P. penetrans plus fungi plus bacteria were present in the soil. It is suggested that fungi, bacteria, nematodes alone or their combinations such as nematodes plus bacteria or nematodes plus fungi plus bacteria may contribute towards the occurrence of apple replant disease.

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Section: Discussionsupporting

confidence: 75%

Section: Discussionmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Effects of nematodes, fungi and bacteria on the growth of young apple trees grown in apple replant disease soil

1992

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“…The pathogenicity of Pratylenchus penetrans to apple is well documented (Jaffee et al, 1982). Early in each growing season (October and November), the abundance of Pratylenchus sp.…”

Section: Discussionmentioning

confidence: 99%

Soil nematode responses to fertilization with ammonium nitrate after six years of unfertilized apple orchard

Azpilicueta¹,

Aruani

Chaves³

et al. 2014

Span. j. agric. res.

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A nematode community was used as a bioindicator of changes in agroecosystems caused by fertilization. The effect of applying nitrogen (N) fertilizer on a soil nematode community structure was studied in a soil which had not been fertilized for six years in the Rio Negro Valley, Argentina. Treatments were: i) 100 kg N ha-1 (N100); ii) 200 kg N ha-1 (N200); in each case 50% of the dosage was applied at the time of petal fall and 50% at fruit harvest in 2004/2005, 2005/2006, 2006/2007 growing seasons; and iii) control with no fertilizer (N0). Soil samples were collected in the 0 to 30 cm soil layer in October, November, April and July in each growing season. The number of bacterivores increased in N200 compared to N0. Cephalobidae were present in greater numbers in N200 than in N100 and N0. Predator abundance was lower under N200, after the first N application in each growing season. The ratio of fungivores to bacterivores (F/B) was 0.21, 0.3 and 0.41 in N200, N100 and N0, respectively. N200 resulted in a community with a lower maturity index (MI) than N0. Structure index (SI) was lower in N200 than N100 and N0. The enrichment index (EI) was less sensitive at detecting fertilizer effects. In November and April, soil nitrate concentrations were higher in N200 than in N100 and N0. Soil nitrate concentration was positively correlated with EI and negatively with MI, SI and F/B. N200 affected the trophic structure of the nematode community consistent with a less stable soil system.

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Apple Rootstocks

Marini

Fazio²

2018

Horticultural Reviews

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Role of Soil Microflora andPratylenchus penetransin an Apple Replant Disease

Cited by 64 publications

References 0 publications

Effects of nematodes, fungi and bacteria on the growth of young apple trees grown in apple replant disease soil

Effects of nematodes, fungi and bacteria on the growth of young apple trees grown in apple replant disease soil

Soil nematode responses to fertilization with ammonium nitrate after six years of unfertilized apple orchard

Apple Rootstocks

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