EFFECT OF SUMMER FALLOWING ON THE ROOT LESION NEMATODE PRATYLENCHUS PENETRANS (COBB) AND YIELD OF FLUE-CURED TOBACCO IN ONTARIO

1962 ◽  
Vol 42 (4) ◽  
pp. 642-645 ◽  
Author(s):  
W. B. Mountain ◽  
J. M. Elliot
Keyword(s):  
Nitrogen Content ◽  
Field Experiments ◽  
Pratylenchus Penetrans ◽  
Root Lesion Nematode ◽  
Rye Straw ◽  
Subsequent Crop ◽  
Lesion Nematode

Field experiments showed that disking of rye straw in early June, rather than at the normal time in mid-July, reduced the population of the root lesion nematode in the roots of the subsequent crop of tobacco as effectively as nematicides. However, summer fallowing tended to lower the nitrogen content of the soil and supplementary nitrogen was required to obtain normal yields of tobacco.

THE INFLUENCE OF SPRING AND FALL APPLICATION OF NEMATICIDES ON PRATYLENCHUS PENETRANS AND QUALITY OF FLUE-CURED TOBACCO GROWN WITH VARIOUS FORMS OF NITROGEN

1963 ◽  
Vol 43 (1) ◽  
pp. 18-26 ◽  
Author(s):  
J. M. Elliot ◽  
W. B. Mountain
Keyword(s):  
Field Experiments ◽  
Tobacco Plant ◽  
Ammonium Nitrogen ◽  
Pratylenchus Penetrans ◽  
Total Alkaloids ◽  
Yield And Quality ◽  
Rye Straw ◽  
Lesion Nematode ◽  
Fall Application

Field experiments were conducted to determine the effect of two chlorinated hydrocarbon nematicides on control of the root lesion nematode Pratylenchus penetrans (Cobb) and on the yield and quality of flue-cured tobacco. The nematode was effectively controlled with a spring or fall application of either D-D or Telone. Fall application resulted in an increase in total nitrogen and total alkaloids and a decrease in reducing sugars and ethanol extractables in the cured tobacco leaf, effects which are associated with low quality. Evidence indicated that fall fumigation inhibited the nitrification of ammonium nitrogen fertilizer applied to the rye straw in the summer preceding the tobacco crop. Excessive amounts of mineral nitrogen became available to the tobacco plant during its growing season. Spring application increased the chlorine content of the leaf but had no other adverse effects on chemical composition.

CONTROL OF THE ROOT-LESION NEMATODE (PRATYLENCHUS PENETRANS) IN FLUE-CURED TOBACCO IN ONTARIO

1975 ◽  
Vol 55 (1) ◽  
pp. 309-314 ◽  
Author(s):  
C. F. MARKS ◽  
J. M. ELLIOT
Keyword(s):  
Field Experiments ◽  
Weather Conditions ◽  
Growing Season ◽  
Relative Efficacy ◽  
Pratylenchus Penetrans ◽  
Root Lesion Nematode ◽  
Population Densities ◽  
Nicotiana Tabacum L ◽  
Degree Of Control ◽  
Lesion Nematode

Field experiments were conducted on Fox loamy sand to determine the relative efficacy of certain fumigant and non-fumigant nematicides against Pratylenchus penetrans in flue-cured tobacco (Nicotiana tabacum L.). Control of nematodes in the soil shortly after transplanting was better with the fumigants than with the non-fumigant nematicides, but the degree of control in the roots was about the same. Initial nematode population densities in the soil were similar in 1971 and 1972, but the crop responded to nematicide treatments only in 1972. The response differences were attributed mainly to weather conditions. It was not possible to relate final yields of flue-cured tobacco to degree of control of P. penetrans in either the soil or the roots at any one time during the growing season.

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.

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.

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
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