GENETIC CONTROL OF RESISTANCE IN TOMATO (LYCOPERSICON ESCULENTUM). II. SEGREGATIONS FOR HIGH AND LOW LEVELS OF RESISTANCE TO MELOIDOGYNE INCOGNITA

1980 ◽  
Vol 22 (2) ◽  
pp. 223-226 ◽  
Author(s):  
Gurmel S. Sidhu ◽  
John M. Webster
Keyword(s):  
Lycopersicon Esculentum ◽  
Resistance Gene ◽  
Meloidogyne Incognita ◽  
Unit Length ◽  
Root Knot Nematode ◽  
Tomato Cultivars ◽  
Low Levels ◽  
High Level ◽  
Different Levels ◽  
Mode Of Inheritance

Tomato cultivars Nematex and Rutgers show different levels of resistance to root-knot nematode Meloidogyne incognita (Kofoid and White) infection. A method based on the number of galls per unit length of root is used to determine the low and high levels of resistance, and, based on this, the mode of inheritance of such resistance levels. High level of resistance of cv. Nematex is controlled by the resistance gene LMiR1 and the low level of resistance of cv. Rutgers by its allele [Formula: see text].

scholarly journals Age of Plant Material Influences Resistance of Some Prunus Rootstocks to Meloidogyne incognita

HortScience ◽  
1995 ◽  
Vol 30 (3) ◽  
pp. 582-585 ◽  
Author(s):  
Carolina Fernández ◽  
Jorge Pinochet ◽  
Daniel Esmenjaud ◽  
Maria Joao Gravato-Nobre ◽  
Antonio Felipe
Keyword(s):  
Meloidogyne Incognita ◽  
Prunus Persica ◽  
Saline Soil ◽  
Soil Condition ◽  
Plant Age ◽  
Root Knot Nematode ◽  
Maturation Period ◽  
Nematode Reproduction ◽  
Loss Of Resistance ◽  
High Level

The influence of salinity and plant age on nematode reproduction was determined on two susceptible and six root-knot-nematode-resistant Prunus rootstocks inoculated with Meloidogyne incognita (Kofoid and White). Experiments were conducted under greenhouse conditions over 120 (plant age study) and 75 (salinity study) days. Following inoculation with 4000 nematodes per plant, susceptible 2-month-old GF-677 (Prunus persica L. Batsch. × P. dulcis Mill. Webb) and Montclar (P. persica) were affected significantly more than 1-year-old plants. Barrier (P. persica × P. davidiana Carr. Franch.) plantlets showed a partial loss of resistance in relation to older plants, suggesting that a root tissue maturation period is required for expression of full resistance. Nemared (P. persica); G × N No 22 (P. persica × P. dulcis); and the plums GF 8-1 (P. cerasifera Ehrh. × P. munsoniana Wight and Hedrick), PSM 101 (P. insititia L.), and P 2980 (P. cerasifera) maintained their high level of resistance or immunity, regardless of plant age. Nematode reproduction was higher in GF-677 rootstock in saline soil. Nemared and Barrier showed similar low galling and nematode reproduction in nonsaline and saline soil. PSM 101 immunity to M. incognita was not affected by soil condition.

scholarly journals Dimethyl Disulfide- A Potential Biopesticide Against Root-Knot Nematode of Tomato (Lycopersicon Esculentum L.)

2012 ◽  
Vol 36 (4) ◽  
pp. 685-695 ◽  
Author(s):  
MI Faruk ◽  
ML Rahman ◽  
MMM Mustafa ◽  
IR J Coosemans
Keyword(s):  
Lycopersicon Esculentum ◽  
Meloidogyne Incognita ◽  
Tomato Plant ◽  
Vegetative Growth ◽  
Dimethyl Disulfide ◽  
Soil Nematode ◽  
Root Knot Nematode ◽  
Tomato Seedlings ◽  
Dry Conditions ◽  
Pot Culture

Dimethyl disulfide (DMDS), the natural biopesticide extracted from Allium spp., was evaluated against root-knot nematode (Meloidogyne incognita) of tomato (Lycopersicon esculentum L.) in greenhouse pot culture. All concentrations of DMDS viz. 30 ml, 60 ml, and 80 ml and Aldicarb @ 2g per square meter of soil were effective against root-knot disease under both wet and dry conditions of soil. Nematode incidence was reduced drastically by higher dose of DMDS and Aldicarb @ 2g but did not accelerate vegetative growth of tomato plant especially when tomato seedlings were transplanted immediately after soil treatment. Low concentration of DMDS (30 ml per square meter of soil) was found appropriate for controlling root-knot nematode of tomato, accelerating saprophytic nematode population in soil and also enhancing vegetative growth of tomato plant under dry condition of soil.   DOI: http://dx.doi.org/10.3329/bjar.v36i4.11759   Bangladesh J. Agril. Res. 36(4): 685-695, December 2011  

Effects of foliar fungicide sprays on disease and yield of processing tomatoes in Ontario

1993 ◽  
Vol 73 (4) ◽  
pp. 1209-1215 ◽  
Author(s):  
V. Poysa ◽  
R. A. Brammall ◽  
R. E. Pitblado
Keyword(s):  
Lycopersicon Esculentum ◽  
Disease Development ◽  
Fungicide Application ◽  
Commercial Processing ◽  
Tomato Cultivars ◽  
Low Levels ◽  
Marketable Fruit ◽  
Restricted Use ◽  
Foliar Fungicide ◽  
Tomato Disease

The effects of controlling foliar diseases with a foliar fungicide applied following a TOMCAST regime were evaluated on commercial processing tomato (Lycopersicon esculentum Mill.) cultivars in three locations in Southwestern Ontario in 1990 and 1991. For each cultivar, one set of plants was sprayed with chlorothalonil (Bravo 500) and one set received no fungicide application during the growing season. At two of the three locations, fungicide application significantly reduced final foliar disease development, averaged across all cultivars, from over 60% of the foliage infected to 10% infected. At the third location disease development was more restricted. Use of foliar fungicide did not result in a significant increase in either total fruit yield or yield of marketable fruit measured across cultivars, years, and locations. The application of fungicide (4–10 sprays) reduced the average number of fruit infected with anthracnose by 50% over all cultivars treated. Several cultivars, however, had relatively low levels of anthracnose even without fungicide sprays. While fungicide sprays may be important in maintaining fruit quality, both with respect to solids levels and degree of mould contamination, fungicide may not be required to maintain yields every year for many tomato cultivars commercially grown in Ontario. Key words: Lycopersicon esculentum, tomato disease, anthracnose

scholarly journals Functional Characterization of Mi, a Root-knot Nematode Resistance Gene from Tomato (Lycopersicon esculentum L.)

2006 ◽  
Vol 48 (12) ◽  
pp. 1458-1465 ◽  
Author(s):  
Ru-Gang Chen ◽  
Li-Ying Zhang ◽  
Jun-Hong Zhang ◽  
Wei Zhang ◽  
Xue Wang ◽  
...  
Keyword(s):  
Lycopersicon Esculentum ◽  
Resistance Gene ◽  
Functional Characterization ◽  
Nematode Resistance ◽  
Root Knot Nematode ◽  
Nematode Resistance Gene
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