THE PATHOGENICITY OF PRATYLENCHUS PENETRANS TO CELERY

1963 ◽  
Vol 43 (1) ◽  
pp. 70-74 ◽  
Author(s):  
J. L. Townshend
Keyword(s):  
Plant Nutrients ◽  
Silica Sand ◽  
Pratylenchus Penetrans ◽  
Root Lesion Nematode ◽  
Primary Parasite ◽  
Lesion Nematode

Celery seedlings, grown aseptically in silica sand with plant nutrients, were inoculated with surface-sterilized specimens of the root lesion nematode Pratylenchus penetrans (Cobb, 1917) Filip. & Stek., 1941. The reactions of invaded roots were studied microscopically. The epidermis, cortex, and endodermis of young celery roots showed different degrees of discoloration after invasion of P. penetrans, with the endodermis most severely affected. Pratylenchus penetrans was a primary parasite and pathogen of celery.

EFFECTS OF SOIL MANAGEMENT ON NUMBERS OF THE ROOT-LESION NEMATODE PRATYLENCHUS PENETRANS IN SOILS OF ONTARIO PEACH ORCHARDS

1973 ◽  
Vol 53 (1) ◽  
pp. 181-185
Author(s):  
C. F. MARKS ◽  
W. J. SAIDAK ◽  
P. W. JOHNSON
Keyword(s):  
Cover Crops ◽  
Sandy Loam ◽  
Management Practice ◽  
Soil Management ◽  
Pratylenchus Penetrans ◽  
Root Lesion Nematode ◽  
Entire Area ◽  
Red Fescue ◽  
Rate Of Increase ◽  
Lesion Nematode

The use of herbicides and cover crops in peach orchards influenced the numbers of the root-lesion nematode, Pratylenchus penetrans, in Fox sandy loam soils. Plots treated over the entire area with the herbicide combination of paraquat (1,1′-dimethyl-4,4′-bipyridinium ion) and linuron (3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea) had the smallest number of P. penetrans in the soil. The soil management practice used by many Ontario growers, clean cultivation until 1 July followed by a weed cover, resulted in the largest numbers of nematodes in the soil. Creeping red fescue (Festuca rubra L.) as a cover crop retarded the rate of increase of P. penetrans numbers in the soil but Sudan grass (Sorghum vulgare cult sudanense Hitchc.) did not. Weed control practices that permitted a temporary re-establishment of weed covers, did not retard the increase of P. penetrans numbers. Use of paraquat plus linuron to limit weed growth in the tree rows coupled with a permanent cover of creeping red fescue between the rows appears to be an effective way of retarding increases of P. penetrans numbers in peach orchards. Soil management systems that incorporate these features may be of practical value to Ontario peach growers.

Tagetes patula as an effective catch crop for long-term control of Pratylenchus penetrans

Nematology ◽  
2004 ◽  
Vol 6 (6) ◽  
pp. 877-881 ◽  
Author(s):  
Albartus Evenhuis ◽  
Gerard Korthals ◽  
Leendert Molendijk
Keyword(s):  
Population Density ◽  
Economic Loss ◽  
Soil Fumigation ◽  
Economic Damage ◽  
Tagetes Patula ◽  
Pratylenchus Penetrans ◽  
Root Lesion Nematode ◽  
Rate Of Increase ◽  
Chemical Soil ◽  
Lesion Nematode

AbstractTagetes patula is well known to be able to diminish Pratylenchus penetrans (Cobb) populations. In a field experiment, the increase of the P. penetrans soil population density after growing T. patula was significantly less than after chemical soil fumigation with metam sodium. The effect of T. patula on P. penetrans population densities lasted longer than the effect of chemical soil fumigation. Strawberries were grown for 3 consecutive years after T. patula without damage by the root lesion nematode. Assuming a linear rate of increase of the P. penetrans population density, we predict that strawberries could be grown for about 7 successive years without economic damage due to the root lesion nematode. Strawberry yield was greater from the crop grown 3 years after T. patula than that after soil fumigation 4 years previously. About 2 t strawberry yield increase is necessary to allow the growth of Tagetes every 5th year, without economic loss. The possibility of growing both strawberries and Tagetes in the same year should be investigated.

Nematicidal Activities of 4-Hydroxyphenylacetic Acid and Oidiolactone D Produced by the Fungus Oidiodendron sp.

2011 ◽  
Vol 66 (1-2) ◽  
pp. 31-34 ◽  
Author(s):  
Kouhei Ohtani ◽  
Shozo Fujioka ◽  
Atsumi Shimada ◽  
Yasuo Kimura
Keyword(s):  
Bursaphelenchus Xylophilus ◽  
Pine Wood Nematode ◽  
Pratylenchus Penetrans ◽  
Root Lesion Nematode ◽  
Pine Wood ◽  
Spectroscopic Analyses ◽  
Hydroxyphenylacetic Acid ◽  
Lesion Nematode

Two nematicides, 4-hydroxyphenylacetic acid (4-HPA) (1) and oidiolactone D (2), were isolated from cultures of the fungus Oidiodendron sp., and their structures were identified by spectroscopic analyses. Compound 2 showed nematicidal activities against the root-lesion nematode, Pratylenchus penetrans, and the pine wood nematode, Bursaphelenchus xylophilus. Compound 1 was also active against these two nematodes but to a lesser extent.

Quantitative detection of the root-lesion nematode, Pratylenchus penetrans, using qPCR

2013 ◽  
Vol 137 (2) ◽  
pp. 403-413 ◽  
Author(s):  
Fouad Mokrini ◽  
Lieven Waeyenberge ◽  
Nicole Viaene ◽  
Fouad Abbad Andaloussi ◽  
Maurice Moens
Keyword(s):  
Quantitative Detection ◽  
Pratylenchus Penetrans ◽  
Root Lesion Nematode ◽  
Lesion Nematode

scholarly journals Yield of ‘Superior’ potatoes (Solanum tuberosum) and dynamics of root-lesion nematode (Pratylenchus penetrans) populations following “nematode suppressive” cover crops and fumigation

2005 ◽  
Vol 82 (1) ◽  
pp. 13-23 ◽  
Author(s):  
A.W. McKeown ◽  
J.W.. Potter
Keyword(s):  
Solanum Tuberosum ◽  
Cover Crops ◽  
Cover Crop ◽  
Potato Crop ◽  
Red Clover ◽  
Vegetable Production ◽  
Pratylenchus Penetrans ◽  
Root Lesion Nematode ◽  
Lesion Nematode ◽  
Sorghum Sudangrass

Studies were conducted at Simcoe, Ontario from 1992 to 1996 to evaluate various cover crop species as possible alternatives to fumigation prior to potatoes (Solanum tuberosum). Cereal rye (Secale cereale), a common overwinter cover crop in vegetable production systems, is an excellent host for the root-lesion nematode (Pratylenchus penetrans) and provides a suitable overwintering host on coarse sandy soils. Vorlex Plus CP and Telone IIB fumigants were compared to 'Domo' mustard (Brassica juncea) for the 1993 and 1994 potato crop years. Rye plus red clover (Trifolium pratense) was included as a known host cover crop system. Cyanogenic plants including 'Domo' mustard (1994) or 'Cutlass' mustard (1995, 1996), 'Forge' canola (Brassica rapa), 'Sordan 79' and 'Trudan 8' sorghum-sudangrass hybrids (Sorghum bicolor), and flax (Linum usitatissimum) were compared to Vorlex Plus CP fumigant and 'NK557' sorghum (Sorghum vulgare) for effects on potato yield and nematodes. Shallow (15 cm) and deep (45 cm) fumigation with Vorlex Plus CP were also compared prior to potatoes for the 1994 to 1996 crop years. There was little detectable difference in percent or days to 50% emergence of potatoes following any treatment. Highest total and marketable yields resulted from Telone IIB fumigation, then Vorlex Plus CP fumigation and 'Domo' mustard, followed by control and rye plus red clover cover. Populations of nematodes surpassed the threshold of 1000 kg-1 soil in all treatments and were highest in potatoes following rye plus red clover. Yield and nematode control following sorghum-sudangrass hybrids and mustards appeared to be intermediate between fumigated and not fumigated. All of the cover crops appeared to be root-lesion nematode hosts in the field, and reduction of population levels appeared to result after incorporation or nematode winterkill. Nematode mortality was excellent with fumigation and next best from kill over the winter after 'Sordan 79' incorporation. 'Sordan 79' grown over at least part of the summer followed by incorporation was an alternative to fumigation prior to potatoes. Deep chiselling appears to reduce nematode population, possibly by physical action. Where nematode populations warrant, deep fumigation prior to potatoes appears to be of merit.

scholarly journals Wild and Cultivated Strawberries Can Tolerate or Resist Root-lesion Nematode

HortScience ◽  
1994 ◽  
Vol 29 (9) ◽  
pp. 1074-1077 ◽  
Author(s):  
John W. Potter ◽  
Adam Dale
Keyword(s):  
Nematode Resistance ◽  
High Yield ◽  
Pratylenchus Penetrans ◽  
Root Lesion Nematode ◽  
Lesion Nematodes ◽  
Fragaria Virginiana ◽  
Lesion Nematode ◽  
Growth Vigor ◽  
Root Lesion Nematodes ◽  
Population Counts

Intraspecific crossing of `Guardian' and `Midway' cultivated strawberry (Fragaria ×ananassa Duch.) produced a family of genotypes, some of which suppressed root-lesion nematode [Pratylenchus penetrans (Cobb)] population counts and produced large berries and high yield. Unlike `Midway', `Guardian' also suppressed P. penetrans. Among several beach strawberry [Fragaria chiloensis (L.) Duch.] and woodland strawberry (Fragaria virginiana Duch.) genotypes, variation was found in resistance and tolerance to root-lesion nematodes. Three F. chiloensis genotypes showed tolerance, and at least two genotypes may be somewhat resistant. Three F. virginiana genotypes also were tolerant, and three were resistant. Also, one (`Little Cataraqui 4') combined root growth vigor with nematode resistance. We concluded that exploitable genetic diversity in vigor and reaction to root-lesion nematodes exists in wild Fragaria and in F. ×ananassa.

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