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.

ASSESSMENT OF TURFGRASSES FOR THE MANAGEMENT OF Pratylenchus penetrans and Paratylenchus projectus IN ORCHARDS

1984 ◽  
Vol 64 (2) ◽  
pp. 355-360 ◽  
Author(s):  
J. L. TOWNSHEND ◽  
R. A. CLINE ◽  
V. A. DIRKS ◽  
C. F. MARKS
Keyword(s):  
Cover Crops ◽  
Tall Fescue ◽  
Poa Pratensis ◽  
Kentucky Bluegrass ◽  
Grass Species ◽  
Pratylenchus Penetrans ◽  
Root Lesion Nematode ◽  
Red Fescue ◽  
Poa Trivialis ◽  
Lesion Nematode

The capacity of 18 turfgrasses to repress the multiplication of root-lesion nematode, Pratylenchus penetrans Cobb, was tested in a growth room. Populations varied from 230 nematodes per pot on Agrostis alba L. to 1800 per pot on Poa trivialis L. Selected grass species and cultivars were tested as cover crops in established peach, plum, and apple orchards at Vineland from 1975 to 1980. Average population levels of the root-lesion nematode and the pin nematode, Paratylenchus projectus Jenkins, did not build up substantially during this period. Tall fescue, F. arundinacea (Schreb.), had the lowest average nematode population levels as a grass cover. Tall fescue and creeping red fescue, F. rubra L., were more effective in suppressing nematodes than Kentucky bluegrass, Poa pratensis L., and orchardgrass, Dactylis glomerata L..Key words: Apple, plum, peach, root-lesion, pin-nematodes

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.

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 Cover Crops Resistant to Root-lesion Nematodes in Raspberry

HortScience ◽  
1996 ◽  
Vol 31 (7) ◽  
pp. 1195-1198 ◽  
Author(s):  
Thierry Vrain ◽  
Robyn DeYoung ◽  
John Hall ◽  
Stan Freyman
Keyword(s):  
White Clover ◽  
Cover Crops ◽  
Cover Crop ◽  
Rubus Idaeus ◽  
Pratylenchus Penetrans ◽  
Nematode Density ◽  
Red Fescue ◽  
Lesion Nematodes ◽  
Lesion Nematode ◽  
Root Lesion Nematodes

Cover crops used in red raspberry plantings (Rubus idaeus L.) are often good hosts of the root-lesion nematode (Pratylenchus penetrans Filipjev & Sch. Stekoven), a major soilborne pathogen of raspberry. The effects of two susceptible cover crops, white clover (Trifolium repens L.) and barley (Hordeum vulgare L.), planted in between rows, on nematode density and growth of raspberry plants were compared to those of three cover crops resistant to the nematode: redtop (Agrostis alba L.), creeping red fescue (Festuca rubra L.), and `Saia' oat (Avena sativa L.). Nematode multiplication in raspberry roots and in cover crop roots was assessed over 4 years. Growth and vigor of plants were estimated at the end of the experiment by counting primocanes and determining height and biomass. Nematode multiplication was suppressed in roots of `Saia' oat, fescue, and redtop compared to barley or white clover. Nematode density in roots and rhizosphere soil of raspberry was not affected by the choice of cover crops. Nematode suppression in the three resistant cover crops did not translate into increased vigor of raspberry plants.

SOIL FUMIGATION FOR CONTROL OF VERTICILLIUM WILT OF EGGPLANT

1967 ◽  
Vol 47 (1) ◽  
pp. 1-10 ◽  
Author(s):  
C. D. McKeen ◽  
W. B. Mountain
Keyword(s):  
Plant Growth ◽  
Verticillium Wilt ◽  
Verticillium Dahliae ◽  
Sandy Loam ◽  
Soil Fumigation ◽  
Pratylenchus Penetrans ◽  
Root Lesion Nematode ◽  
High Moisture ◽  
Field Soils ◽  
Lesion Nematode

Fumigation of Fox sandy loam field soils naturally infested with Verticillium dahliae delayed the onset and reduced the final incidence of Verticillium wilt of eggplant. Fumigation resulted in greater plant growth and concomitant increases in yield. Vorlex and EP-201 applied at 561.6 l./ha gave similar control of wilt and yield increases. Fumigation with Vorlex gave best control of wilt in 1964 and 1965, years in which the upper 15 cm of soil contained uniformly high moisture at the time of treatment. Vorlex applied at 561.6 l./ha reduced root populations of the root-lesion nematode Pratylenchus penetrans to considerably lower levels than Telone at 449.3 l./ha. Vapam was not as effective in controlling wilt as either Vorlex or EP-300, though like EP-300 it caused no early retardation of growth of eggplant. Yield increases from fumigation varied from year to year and ranged from 5 to more than 100 times yields from untreated soils. Soil fumigation in eggplant culture promises to be practical in southwestern Ontario where Verticillium wilt is serious.

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.

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