Resistance screening of lentil cultivars against the root-knot nematode Meloidogyne incognita

Abstract

SummaryThe root-knot nematode Meloidogyne incognita is a major soil parasite of lentil crops. Increasing restrictions of chemical nematicides have triggered a growing attention and interest in alternate root-knot nematode management. The present study was conducted to examine the level of resistance and/or susceptibility of fi ve lentil cultivars (PL-456, KLS-218, Desi, DPL-62, Malika), grown in pots, against the root-knot nematode M. incognita. Root-knot nematode reproduction and host damage were assessed by recording the nematode infestation levels and reduction percentage of plant growth parameters. Nematode response and plant growth diff erentiated amongst the lentil cultivars. None of the cultivars was found immune or highly resistant. The cultivar Malika was found moderately resistant as it showed the lowest number of galls and egg masses/root as well as the lowest reduction of plant fresh weight (10.4%) and dry weight (6.9%). On the other hand, the cultivar Desi manifested the highest susceptibility exhibiting the highest number of galls and egg masses. There was a signifi cantly negative correlation between the number of galls and plant growth parameters (plant fresh and dry weight and plant height).

Varietal Susceptibility and Disease Resistance of Tomato Cultivars against Meloidogyne incognita in Greenhouse Condition

“…Similarly, all tested cultivars showed reduction in plant yield due to nematode infestation. Similar results were also observed by other workers that resistant cultivars yield comparatively better than susceptible cultivars (Ansari et al, 2018). In addition to plant growth reduction, some biochemical changes were also found in all cultivar of tomato.…”

“…Because of the restrictions on chemical pesticide use and their adverse effects on the environment, as well as on human and animal health, therefore, alternative strategies for nematode management are highly desirable (Ntalli et al, 2020). Nematode infestation levels could be minimized in the soil by using resistant cultivars with crop rotation (Ansari et al, 2018). The use of resistant cultivars is an environmentally friendly, safe, most comfortable and economically feasible alternative strategy to manage root-knot nematodes (Sujatha et al, 2017).…”

Screening for resistance and susceptibility in some beetroot cultivars to root-knot nematode, Meloidogyne javanica

“…The decrease in total chlorophylls and total carotenoids were found least pronounced with 13.6% and 14.1%, respectively, in the Red Ace cultivar, which was statistically different from other susceptible cultivars (Table 4). A similar reduction in total chlorophyll and carotenoid content were also observed in the studies of Ansari et al (2018) and Tsaniklidis et al (2021) on lentil and Cucumis melo infested with M. incognita and M. javanica. The maximum damage caused to host plant resulted in physiological and biochemical changes caused by nematode feeding.…”

“…Table 1 revealed that the final nematode population in 250 g soil was marked maximum in highly susceptible cultivar Red Express (2265) followed by susceptible cultivar Ruby Red (1928), moderately susceptible Red Queen (1664) and Atlas (1517), and moderately resistant cultivars DDR (847), Red Ace (816) and CG (766). These results are evident from work done previously by different researchers as they have investigated the reaction of different okra, carrot, tomato and lentil cultivars to root-knot nematodes (Mukhtar et al, 2014;Khan et al, 2018;Asif et al, 2018;Ansari et al, 2018) and reported varying levels of resistance or susceptibility. The population of nematodes in soil was significantly highest in highly susceptible and susceptible cultivars whereas it decreased in moderately resistant and resistant beetroot cultivars.…”

Kök-Ur Nematodu Meloidogyne luci’nin Farklı Populasyon Yoğunluklarının Domates Gelişimine ve Nematod Üremesine Etkileri

“…Bu çalışmada, nematod ile bulaşık bitkilerde belirlenen klorofil içeriği, nematod verilmeyen kontrol bitkilerinden daha düşük tespit edilmesine rağmen, bu azalış oranı önemli seviyede değildir. Benzer şekilde, Lopez-Gomez and Verdejo-Lucas ( 2017 (Ansari et al 2018, Belair and Boivin 1988, Korayem and Bondok Moawad 2013, Lopez-Gomez et al 2015, Mukhtar et al 2013. Bitki köklerinde kök-ur nematodlarının neden olduğu urlar, bu nematod cinsinin varlığını belirlemek için önemli bir simptomdur.…”