Control of Meloidogyne paranaensis in coffee plants mediated by silicon

Nematology ◽  
2017 ◽  
Vol 19 (2) ◽  
pp. 245-250 ◽  
Author(s):  
Miria Roldi ◽  
Claudia Regina Dias-Arieira ◽  
Santino A. da Silva ◽  
Orazília F. Dorigo ◽  
Andressa Cristina Zamboni Machado
Keyword(s):  
Induced Resistance ◽  
Population Based ◽  
Nematode Population ◽  
Systemic Induced Resistance ◽  
Potential Control ◽  
Coffee Plants ◽  
Molecular Relationships ◽  
Reproduction Factor

Coffee plants are considerably affected by the presence of Meloidogyne spp. and management is based in the use of resistant rootstocks. Systemic induced resistance could constitute an option to manage Meloidogyne paranaensis in coffee-growing areas. Coffee seedlings cv. Mundo Novo were treated with silicate before the inoculation of M. paranaensis to evaluate the potential control of this pathogen. We found, 120 days after the inoculation of 2000 eggs, that the application of silicate was effective to reduce the nematode population, based on reproduction factor and number of nematodes per g roots. Based on the present results, we suggest that the application of silicon constitutes an important alternative for the management of M. paranaensis in infested coffee-growing areas. Further studies are necessary to clarify the biochemical and molecular relationships between M. paranaensis and coffee in the presence of silicon.

scholarly journals Host Range of a California Sting Nematode Population

HortScience ◽  
2000 ◽  
Vol 35 (7) ◽  
pp. 1276-1278 ◽  
Author(s):  
S. Bekal ◽  
J.O. Becker
Keyword(s):  
Host Range ◽  
Citrullus Lanatus ◽  
Restriction Pattern ◽  
Nematode Population ◽  
Golf Courses ◽  
Horticultural Crops ◽  
Belonolaimus Longicaudatus ◽  
Host Status ◽  
California Population ◽  
Reproduction Factor

Recently, sting nematodes were discovered associated with dying turfgrass in several golf courses in Coachella Valley, Calif. Based on their morphology and internal transcribed spacer (ITS) rDNA restriction pattern, the pests were identified as Belonolaimus longicaudatus Rau. This study was undertaken to determine the host status of 60 different plant species and cultivars for a California population of B. longicaudatus. The host range tests were conducted under greenhouse conditions at 25 ± 2 °C and ambient light. At the second-leaf stage, each pot was infested with 55 ± 12 adults or fourth-stage juveniles per 150 g of blow sand. The population densities determined after 7 weeks of incubation qualified >80% of the plants tested as good hosts with a reproduction factor (Rf = Pf/Pi) > 4. The majority of those were grasses, although reproduction was best on Gossypium hirsutum L. with Rf = 58.6. While Capsicum annuum L., Medicago sativa L., Arachis hypogaea L., Euphorbia glyptosperma Engelm., Cucumis sativus L., and Daucus carota L. were less suitable host plants with Rf < 4, only Abelmoschus esculentus (L.) Moench, Citrullus lanatus Thunb., and Nicotiana tabacum L. were nonhosts among the tested species. This sting nematode population had a high reproductive fitness on a majority of species tested and must be considered a major threat for most agricultural and horticultural crops grown in sandy soils.

The effect of sandy soil, bacterium dose and time on the efficacy of Pasteuria penetrans to control Meloidogyne incognita race 1 on coffee

Nematology ◽  
2007 ◽  
Vol 9 (6) ◽  
pp. 845-851 ◽  
Author(s):  
Maria Célia Cordeiro ◽  
Regina Carneiro ◽  
Pedro Cirotto ◽  
Luiz de Mesquita ◽  
Maria Ritta Almeida ◽  
...  
Keyword(s):  
Biological Control ◽  
Sandy Soil ◽  
Meloidogyne Incognita ◽  
Pasteuria Penetrans ◽  
Root Knot Nematode ◽  
Nematode Reproduction ◽  
Second Stage ◽  
Race 1 ◽  
Coffee Plants ◽  
Reproduction Factor

AbstractAn obligate parasite bacterium of the root-knot nematode, Pasteuria penetrans strain P10, isolated from Meloidogyne incognita females on banana roots in Imperatriz Maranhão State, Brazil, was evaluated in glasshouse conditions, using two doses of a dry root bionematicide (107 endospores (5.0 g/seedling) and 106 endospores (0.5 g/seedling)) on seedlings of cv. Mundo Novo coffee. The soil in which coffee seedlings were raised was inoculated previously with these two doses of P. penetrans and after 2 months the plants were transferred to soils of different textures: clay-sandy soil (38% clay, 2% silt and 60% sand) and sandy soil (17% clay, 0% silt and 83% sand). When the coffee plants were 30 cm high, they were inoculated with 20 000 eggs/plant of M. incognita race 1. The coffee plants were examined 8, 16 and 24 months after nematode plant infestation. The effectiveness of the biological control was determined by the reduction of nematode reproduction factor, which ranged from 62 to 67% in clay-sandy soil and 80 to 85% in sandy soil. The mechanism of suppression caused by the bacterium was evaluated by the percentage of infected second-stage juveniles (J2), number of endospores attached/J2 and number of infected females. The high levels of suppression were related to time, increasing from 8 to 24 months, and to the percentage of sand in the soil.

Systemic induced resistance in Monterey pine

2001 ◽  
Vol 31 (2) ◽  
pp. 99-106 ◽  
Author(s):  
Bonello ◽  
Gordon ◽  
Storer
Keyword(s):  
Induced Resistance ◽  
Systemic Induced Resistance ◽  
Monterey Pine
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