scholarly journals Effects of Roots-Applied Resistance Inducers on Penetration and Development of Root-Knot Nematode in Sugar-Beet

2021 ◽  
Vol 13 (1) ◽  
pp. 159-171
Author(s):  
Ibrahim, S. ◽  
Wahdan, H. ◽  
El-Sagheer, M.
Keyword(s):  
Sugar Beet ◽  
Root Knot Nematode ◽  
Resistance Inducers

On the Specific Status of the so-called Biological Strains of Heterodera schachtii Schmidt

1940 ◽  
Vol 18 (4) ◽  
pp. 193-207 ◽  
Author(s):  
Mary T. Franklin
Keyword(s):  
Sugar Beet ◽  
Agrostis Stolonifera ◽  
Heterodera Schachtii ◽  
Root Knot Nematode

The genus Heterodera comprises three species, the root-knot nematode, H. marioni (Cornu 1879) Goodey 1932, and the two species in which cysts are produced. These are, H. schachtii Schmidt 1871, which is associated with disease in potatoes, sugar beet, cereals, peas and some other crops, and H. punctata Thorne 1928, which has caused disease of wheat in Canada, and has been found in this country infesting a common grass Agrostis stolonifera L.

scholarly journals Comparison of Muscodor albus Volatiles with a Biorational Mixture for Control of Seedling Diseases of Sugar Beet and Root-Knot Nematode on Tomato

Plant Disease ◽  
2007 ◽  
Vol 91 (2) ◽  
pp. 220-225 ◽  
Author(s):  
E. Grimme ◽  
N. K. Zidack ◽  
R. A. Sikora ◽  
G. A. Strobel ◽  
B. J. Jacobsen
Keyword(s):  
Sugar Beet ◽  
Meloidogyne Incognita ◽  
Pythium Ultimum ◽  
In Vivo Studies ◽  
Damping Off ◽  
Root Knot Nematode ◽  
Seedling Diseases ◽  
Muscodor Albus

A biorational synthetic mixture of organic components mimicking key antimicrobial gases produced by Muscodor albus was equivalent to the use of live M. albus for control of seedling diseases of sugar beet (Beta vulgaris) caused by Pythium ultimum, Rhizoctonia solani AG 2-2, and Aphanomyces cochlioides. The biorational mixture provided better control than the live M. albus formulation for control of root-knot nematode, Meloidogyne incognita, on tomato (Lycopersicon esculentum). The biorational mixture provided control of damping-off equal to a starch-based formulation of the live fungus for all three sugar beet pathogens, and significantly reduced the number of root-knot galls on tomato roots compared with a barley-based formulation. Rate studies with the biorational mixture showed that 2 and 0.75 µl/cm3 of soil were required to provide optimal control of Rhizoctonia and Pythium damping-off of sugar beet, respectively. Five microliters of biorational mixture per milliliter of water was required for 100% mortality in 24 h for Meloidogyne incognita in in vitro studies. In in vivo studies, 1.67 µl of the biorational mixture/cm3 of sand resulted in fewer root-knot galls than a Muscodor albus infested ground barley formulation applied at 5 g/liter of sand.

scholarly journals Molecular selection of Beta vulgaris L. breeding materials with genes of resistance to abiotic stresses

2019 ◽  
Vol 1 (1) ◽  
pp. 16-20
Author(s):  
A. A. Nalbandyan ◽  
T. P. Fedulova ◽  
A. S. Hussein
Keyword(s):  
Sugar Beet ◽  
Molecular Genetic ◽  
Polymerase Chain Reaction Method ◽  
Root Knot Nematode ◽  
Chain Reaction ◽  
Specific Primers ◽  
Allele Specific ◽  
Molecular Selection ◽  
Polymerase Chain ◽  
Selection Of

In the work, the results of sugar beet breeding materials' molecular-genetic studying for presence of genes of resistance to root-knot nematode, rhizomania and powdery mildew are presented. Testing of plants was conducted using polymerase chain reaction method. The genes R6m-1, Rz1 and Rz2, Pm were identified with the help of 5 one-chain RAPD and 4 allele-specific primers. Aim of the studies is to screen sugar beet varieties for presence of the abovementioned genes of resistance. Domestic and foreign sugar beet hybrids were an object of the studies.

Meloidogyne enterolobii development and reproduction in tomato plants treated with resistance inducers

Nematology ◽  
2021 ◽  
pp. 1-6
Author(s):  
Juliana de O. Silva ◽  
Camilla M. Oliveira ◽  
Renê G. da S. Carneiro ◽  
Mara R. da Rocha
Keyword(s):  
Root Weight ◽  
Root Knot Nematode ◽  
Nematode Reproduction ◽  
Tomato Plants ◽  
Trichoderma Longibrachiatum ◽  
Second Stage ◽  
Meloidogyne Enterolobii ◽  
Resistance Inducers ◽  
Reynoutria Sachalinensis ◽  
Nematode Penetration

Summary Meloidogyne enterolobii is a species capable of overcoming plant resistance moderated by the Mi-1 gene, which is effective against most species of root-knot nematode. This study evaluated the effect of induced resistance in tomato plants (Solanum lycopersicum ‘H-9553’) with the Mi-1 gene against the development and reproduction of M. enterolobii. Seedlings of tomato ‘H-9553’ were transplanted into pots, inoculated with 2000 eggs and second-stage juveniles (J2) of M. enterolobii and treated with Acibenzolar-S-Methyl, Bacillus subtilis, B. subtilis + B. licheniformis + Trichoderma longibrachiatum and extract of Reynoutria sachalinensis. The plants were collected at 5, 10, 15, 20, 25 and 30 days after inoculation (DAI) for the analyses of nematode penetration and development, and at 30 DAI for nematode reproduction. The use of B. subtilis increased fresh root weight when compared to the other treatments (20 DAI). There was a reduction in penetration of J2 in the roots of plants subjected to different resistance inducers. The population density of M. enterolobii was significantly reduced only when plants were treated with R. sachalinensis, indicating it as a potential resistance-inducing agent in tomato plants.

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