Reaction of melon genotypes to Meloidogyne incognita and Meloidogyne javanica

Abstract

Melon is one of the most economically important crops cultivated in Brazil, especially in the Northeast region. However, as its cultivation increases, phytosanitary problems arise, including those caused by nematodes, which are most effectively controlled using resistant cultivars. This study aimed at assessing the reaction of muskmelon genotypes, in terms of resistance to Meloidogyne incognita and M. javanica infestation. The experiment was conducted under greenhouse conditions using a completely randomized design, in a 2 x 15 factorial scheme, with six replications. A total of 15 muskmelon genotypes were evaluated and the 'Santa Cruz Kada' tomato was used as a susceptible control. The total number of eggs and juvenile nematodes in the roots and the reproduction factor were used to assess the genotype reaction. None of the genotypes was resistant to M. incognita. Eight genotypes were classified as resistant to M. javanica and promising for use in melon breeding programs.

Host status of stinking passion flower and yellow passion fruit to Rotylenchulus reniformis, Meloidogyne javanica and Pratylenchus brachyurus

“…Although the reproduction of M. javanica on muskmelon 'Asturia' could be considered low (R=3.97), it was similar to the values usually obtained previously. For example, the R of 14 genotypes of muskmelon ranged from 0.23 to 4.24 in a greenhouse experiment (DINIZ et al, 2016).…”

Host status of eucalypt species to Pratylenchus brachyurus and Meloidogyne incognita

“…Therefore, based on the current knowledge, eucalypts are susceptible to P. brachyurus and resistant to M. incognita. However, the response of plants to phytonematodes may change due to several facts, including the genetic variability of the host and the variability of the nematode population, as reported for many crops and forest species, such as melon (Cucumis melo) × M. javanica (DINIZ et al, 2016), guava (Psidium guajava) × P. brachyurus (PEREIRA et al, 2018), grape vine (Vitis vinifera) × P. brachyurus (SANTOS et al, 2019).…”

Meloidogyne incognita and melon plants: host status, induced resistance and biological control

“…It is interesting to mention that, in Brazil, there are no melon genotypes with resistances to both M. javanica and M. incognita (Diniz et al 2016b;Ito et al 2014).…”

“…This synergic effect is not only able to result in greater losses to the farmer, but it also raises the difficulty to execute a properl disease management. showed resistance for both root-knot species (Pinheiro and Amaro, 2010;Ferraz et al, 2012;Diniz et al, 2016a;Diniz et al, 2016b). Furthermore, there are some efforts to understand Cucumis metuliferus (E. Mey) resistance mechanism against root-knot nematode and use it for breeding programs (Ling et al, 2017;Ito et al, 2014;Pinheiro and Amaro, 2010).…”

“…Furthermore, the Gi presented no differences among the genotypes due the large number of galls and was not included inTable 2.The presented results are in agreement with the literature available about M. incognita and melon plants. Most vegetable crops presents high susceptibility to Meloidogyne species(Huang 1992) Diniz et al (2016b). investigated the host status of 15 melon genotypes against M. incognita and M. javanica and found no resistant hybrids to the first species among them.…”