Root-Knot Nematode Species Associated with Horticultural Crops in the Island of Azores, Portugal

Rusinque, Leidy; Nóbrega, Filomena; Cordeiro, Laura; Lima, Ana; Andrade, S ergio Plens; Inácio, Maria L.

doi:10.3390/horticulturae8020101

Cited by 5 publications

(4 citation statements)

References 12 publications

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“…For routine maintenance, 1 L black plastic pots are filled with a sterilized mixture of local soil, sand, and substrate (1:1:1), watered to 70% of maximum water holding capacity and maintained in these conditions for 1 week for soil stabilization. Tomato seedlings, obtained by germinating commercially acquired certified seeds on hydrated filter paper, are transferred to the pots and kept at 25 ± 1 • C. For nematode infection of the tomato seedlings, RKN egg masses were handpicked from the provided root galls and added to the soil in the vicinity to the roots of tomato plants at an early growth stage, namely at the second unfolded leaf on the main shoot stage of development, and maintained in a growth chamber at 25 ± 1 • C [26]. After ca.…”

Section: Meloidogyne Ethiopica Inoculummentioning

confidence: 99%

Essential Oil Volatiles as Sustainable Antagonists for the Root-Knot Nematode Meloidogyne ethiopica

et al. 2023

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Climate change is prompting a shift of tropical pests to locations with a previously lower probability of invasion. This is the case for root-knot nematodes, Meloidogyne sp., particularly of the tropical group. Among them, M. ethiopica is now considered a threat to European food security. The development of novel sustainable nematicides can be based on in vitro bioassays of highly active phytochemicals, e.g., volatiles from essential oils. However, a steady supply of nematodes is often very difficult and dependent on environmental conditions. In the present study, an in vitro co-culture system of M. ethiopica parasitizing hairy roots of Solanum lycopersicum was established, for the first time, to easily obtain populations of second-stage juveniles (J2). These were then used to screen the nematicidal activity of 10 volatile compounds characteristic of essential oils. Finally, information on the most successful compounds was reviewed to predict their environmental dispersion and ecotoxicological hazards. The M. ethiopica population obtained from the co-culture was morphologically similar to reported populations in natural conditions and could be accurately used in direct-contact bioassays. The aldehydes citral and citronellal induced complete mortality of the tested J2, at 1 mg/mL, while compounds from other chemical groups were not as successful. In comparison to commonly used commercial nematicides, citral and citronellal were less likely to accumulate in the water environmental compartment and have lower reported toxicities compared to aquatic organisms and to mammals. Overall, in vitro co-cultures showed the potential to expedite the screening and discovery of bioactive compounds as a contribution to the development of sustainable biopesticides, as well as to lower the impacts of modern farming on agroecosystems.

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Section: Meloidogyne Ethiopica Inoculummentioning

confidence: 99%

Essential Oil Volatiles as Sustainable Antagonists for the Root-Knot Nematode Meloidogyne ethiopica

et al. 2023

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“…This genus includes more than 100 species [4], which infect more than 3000 plant families [5]. The most common types are M. javanica, M. incognita, M. hapla, M. arenaria, where the percentage of land contaminated with this pest constitutes about 95% of the total agricultural land in the world [6]. The type M. incognita is widespread globally, infecting a wide range of plant hosts and predominates in cold, tropical and subtropical regions [7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Some Nematicides on Hatching Eggs and Viability of Second Stage Juveniles of Root-Knot Nematode, Meloidogyne Incognita Under Laboratory Conditions

Ayyash

Theer

Saleh

2023

IOP Conf. Ser.: Earth Environ. Sci.

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This study was conducted to evaluate the efficacy of three nematicides, Blue Guard, Garland garlic extract, Nema-kill at two concentrations of 50 and 100ppm in inhibiting egg hatching and killing second stage juveniles of root-knot nematode, M. incognita under laboratory conditions. The results showed the effectiveness of nematicides in inhibiting eggs and killing juveniles with significant differences compared with control treatments. Garland garlic extract 100ppm achieved the highest inhibition rate of 94.4% compared with nematicides, blue guard 100ppm and Nema-kill 100ppm, which amounted to 65.6 and 60.2%, respectively, after 7 days compared with control treatment 4.2%. The results also showed significant differences in the killing of juveniles by the superiority of the Garland garlic extract 100 ppm, which achieved the highest killing rate of juveniles that reached 88.4% compared with treatments of the pesticide, blue guard 100 ppm and Nema-kill 100 ppm, which amounted to 59.2 and 58%, respectively, after 4 days.

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“…Nematodes of the Meloidogyne genus, commonly known as root-knot nematodes, are major pests of economically important crops worldwide (Rusinque et al 2022). In Brazil, two Meloidogyne species deserve attention for their extensive e-ISSN 1983-4063 -www.agro.ufg.br/pat -Pesq.…”

Section: Introductionmentioning

confidence: 99%

Response of plants used in cover crop mix to Meloidogyne enterolobii, Meloidogyne incognita and Pratylenchus brachyurus

Lopes,

Pereira,

Baquião

et al. 2023

Pesqui. Agropecu. Trop.

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Cover crop species have been used in mixes in order to improve soil conditions; however, it is important to evaluate the relationship of the employed cultivars with phytonematodes to identify those that do not multiply the pathogens in the cultivated area. This study aimed to assess the response of 11 plant species used in cover crop mix to Meloidogyne enterolobii, M. incognita and Pratylenchus brachyurus. Six experiments were conducted in a greenhouse, using a completely randomized design, with five replications. BMX Potência RR soybean and Santa Clara tomato were used as controls. In at least one of the experiments, IPR 91 Baili buckwheat was susceptible (reproduction factor - RF ≥ 1) to M. enterolobii, M. incognita and P. brachyurus. Common white lupin, URS Altiva white oat, Iapar 61 (Ibiporã) black oat and Embrapa 139 (Neblina) black oat were susceptible to M. enterolobii and M. incognita and resistant (RF < 1) and/or immune (RF = 0) to P. brachyurus. IPR 89 rye and IPR 116 radish were found susceptible to M. incognita and P. brachyurus and resistant to M. enterolobii. BRS 1501 millet and Embrapa 29 (Garoa) black oat were susceptible to M. incognita and resistant/immune to M. enterolobii and P. brachyurus. Brachiaria ruziziensis was considered resistant to M. enterolobii and M. incognita and susceptible to P. brachyurus. URS Corona white oat was the only cover crop considered to be resistant and/or immune to all the nematode species evaluated.

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Root-Knot Nematode Species Associated with Horticultural Crops in the Island of Azores, Portugal

Cited by 5 publications

References 12 publications

Essential Oil Volatiles as Sustainable Antagonists for the Root-Knot Nematode Meloidogyne ethiopica

Essential Oil Volatiles as Sustainable Antagonists for the Root-Knot Nematode Meloidogyne ethiopica

Effect of Some Nematicides on Hatching Eggs and Viability of Second Stage Juveniles of Root-Knot Nematode, Meloidogyne Incognita Under Laboratory Conditions

Response of plants used in cover crop mix to Meloidogyne enterolobii, Meloidogyne incognita and Pratylenchus brachyurus

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