Fusarium oxysporum f. sp. phaseoli and Meloidogyne incognita interaction in common bean

Abstract

To verify a possible relationship between resistance to nematodes and to Fusarium oxysporum (Fop) in common bean, 18 lines (eight resistant and eight susceptible to Fop plus two controls) were evaluated for resistance to the nematode Meloidogyne incognita. This evaluation was conducted in a greenhouse in a randomized block design with five replications. The plot consisted of one pot with two bean plants and a nematode-susceptible tomato plant. Two weeks after sowing, plants were infested in the rhizosphere with 5000 eggs of Meloidogyne incognita, race 3. The number of egg masses was assessed, about 45 days after inoculation. Only lines ESAL 522, ESAL 519 and 'Aporé' were resistant to the nematode. Only 'Aporé' was resistant to both pathogens. The correlation between grades of Fop severity and mean egg mass was practically zero (r = 0.0252, P < 0.9293).

REACTION OF PASSION FRUIT GENOTYPES TO THE COMPLEX Meloidogyne incognita AND Fusarium solani

“…Several studies show that the reaction of plants to fungi can be changed when plants are infected with Meloidogyne spp. (ROCHA, et al, 2018;ABD-EL-FATTAH et al, 2012;CARNEIRO;RAMALHO;PEREIRA, 2010). The presence of this nematode can increase damages in species susceptible to fungi and changes the phenotype of resistance in resistant species to a phenotype of susceptibility (FISCHER et al, 2010).…”