Manejo do solo e da irrigação no controle de Meloidogyne incognita em cultivo protegido

Dutra, Marcos Roberto; Campos, Vicente Paulo; Rocha, Fernando da Silva; Silva, Juliana R. C.; Pozza, Edson Ampélio

doi:10.1590/s0100-41582006000400013

Cited by 5 publications

(5 citation statements)

References 4 publications

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“…As the calculated correlations suggest, M. ethiopica J2s did not move when the soil had a low moisture content, which is consistent with results for other Meloidogyne species (Dutra et al., 2006; Mohawesh & Karajeh, 2014). In contrast, migration was greatest under conditions of high soil moisture.…”

Section: Discussionsupporting

confidence: 88%

“…Frequently irrigated soils or those near saturation facilitate the access of parasitic plant nematodes to growing roots (Rotem & Palti, 1969). By contrast, a lack of soil moisture negatively affects the movement and parasitism of J2 Meloidogyne incognita (Dutra et al., 2006). Deficit irrigation has also been related to a decrease in Meloidogyne javanica populations (Mohawesh & Karajeh, 2014), whereas another study suggested that horizontal J2 M. javanica migration is enhanced by the chemorepulsion of salt concentrations, rather than the water gradient (Prot, 1979), a proposal in line with an earlier hypothesis proposed by Steiner (1925).…”

Section: Introductionmentioning

confidence: 99%

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Velocity of Meloidogyne ethiopica second‐stage juveniles in sandy soil under several soil moisture conditions

González‐Bernal

Magunacelaya

2022

Agronomy Journal

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Calculating the velocity and migration of plant-parasitic nematodes in soil is important for understanding individual roles in nematode populations. Tracking individual nematodes in the soil is difficult, and any marking system can alter the behavior of second-stage juvenile (J2) nematodes. This study examined the velocity of Meloidogyne ethiopica J2s under different soil moisture conditions and proposed a maximum migration distance. Evaluations considered 16 velocity categories (distances of 1.5, 4.5, 9.5, and 14.5 cm; experimental periods of 3, 6, 16, and 26 d) and four moisture ranges (40-55, 55-70, 70-85, and 85-100%) in pots with sandy soil under controlled temperature and moisture conditions. The weighted average velocity of J2 specimens that reached the roots was 70-75 μm h −1 , and the maximum recorded velocity was 378 μm h −1 . The fastest average velocities were 100 μm h −1 (Test 1) and 89 μm h −1 (Test 2). The average velocity at 85-100% soil moisture was very similar to the overall weighted average velocity of M. ethiopica J2s because most movement of the J2 specimens occurred at higher soil moisture ranges. Few J2s moved in the 40-55% soil moisture range. At slow velocities (24, 39, and 72 μm h −1 ), the number of J2s reaching the roots was highly correlated with higher soil moisture. The majority of M. ethiopica J2s did not move or moved at velocities slower than 24 μm h −1 , implying that unless the plant roots were near the nematode, they will not be infested. 1Abbreviations: % bl h -1 , percentage of nematode body length per hour; J2, second-stage juvenile.

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Velocity of Meloidogyne ethiopica second‐stage juveniles in sandy soil under several soil moisture conditions

González‐Bernal

Magunacelaya

2022

Agronomy Journal

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“…Among the control methods available, the nematicides are not recommended, because the lettuce is a leafy vegetable with very short vegetative cycle, furthermore, do not exist nematicides registered for this crop. The crop rotation is often rejected by producers, because they need to earn income in small areas in an intensive way (Dutra et al, 2003). Therefore, the use of resistant cultivars is considered ideal to control nematodes (Wilcken et al, 2005;Oliveira et al, 2015).…”

Section: Resumo Caracterização De Genótipos De Alface Quanto à Resistmentioning

confidence: 99%

Characterization of lettuce genotypes for resistance to root-knot nematodes (Meloidogyne spp.)

et al. 2020

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Genetic resistance is the most suitable mechanism to control root-knot nematodes in lettuce. However, information about the resistance levels of currently used lettuce cultivars is scarce in the literature. Thus, the objective of this research was to characterize lettuce cultivars for resistance to root-knot nematodes Meloidogyne incognita (Mi) and M. javanica (Mj), aiming the identification of resistance sources for breeding, and to transfer information to the productive sector. We evaluated 97 lettuce genotypes in tree trials. In the first one (preliminary assessment), 92 lettuce genotypes were inoculated simultaneously with M. incognita race 1 and M. javanica species, 17 days after sowing. The gall index (GI) was evaluated 41 days after inoculation. In the second trial nine genotypes, selected from the first trial, were evaluated; and in the third trial, two new cultivars from Embrapa were evaluated. In the last two trials, the nematode species were inoculated separately, and the egg mass index (EMI), number of eggs per gram of roots (NEGR) and reproduction factor (RF) were also evaluated. In both trials, the lettuce cultivars Salinas 88 and Grand Rapids were used as resistant controls, as well as cultivar Irene as the susceptible control. The data were submitted to analysis of variance and treatments means grouping by Scott-Knott´s test. The crisp leaf cultivars presented a higher degree of resistance to the root-knot nematodes compared to the smooth leaf type cultivars. Cultivars Vera and Amanda present resistance to M. incognita, and Vanda to M. javanica. ‘Salinas 88’ present resistance mainly to M. javanica; while cultivar Mônica and the Embrapa cultivars BRS Leila and BRS Mediterrânea are resistant to both nematode species.

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“…However, in this control method, the area for crop rotation must remain temporarily unavailable for the cultivation of susceptible vegetables and, typically, lettuce producers make intensive use of small areas (Dutra et al, 2003).…”

Section: Palavras-chavementioning

confidence: 99%

Dosages of bokashi in the control of Meloidogyne javanica in lettuce, in greenhouse

et al. 2017

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Root-knot nematodes are among the major phytosanitary problems on vegetables, and the use of organic matter can be a viable method to control this parasite. Thus, in the present study we aimed to investigate in a greenhouse the use of bokashi doses (organic compound produced by fermentation of grain mixtures) in the control of Meloidogyne javanica in lettuce. Substrate infestation was carried out using tomato seedlings transplanted into pots containing 2 kg of autoclaved soil and inoculated with 2000 eggs and eventual second stage juveniles. After 60 days, the aerial part of the tomato plant was discarded and lettuce seedlings of cv. Vera were transplanted, adding bokashi at doses of 0, 5, 10 and 20 g/pot. One second treatment consisted in the application only at the time of transplant and another to reapply the same dosages in surface 15 days after transplanting. Forty-five (45) days after transplanting, vegetative (dry and fresh weight of aerial part) and nematological (galls and nematodes/g of root) parameters were evaluated. Doses close to 14 g/pot increased the vegetative growth and doses between 13 and 14 g/pot controlled the nematode. The application time did not affect the most of parameters studied.

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Manejo do solo e da irrigação no controle de Meloidogyne incognita em cultivo protegido

Cited by 5 publications

References 4 publications

Velocity of Meloidogyne ethiopica second‐stage juveniles in sandy soil under several soil moisture conditions

Velocity of Meloidogyne ethiopica second‐stage juveniles in sandy soil under several soil moisture conditions

Characterization of lettuce genotypes for resistance to root-knot nematodes (Meloidogyne spp.)

Dosages of bokashi in the control of Meloidogyne javanica in lettuce, in greenhouse

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