Author: Anna Sanz PrietoPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Phytoparasitic nematodes of the genus Meloidogyne spp. are the cause of important losses in horticulture. In recent years, plant resistance has been used to reduce this damage in a sustainable way. The present work determines the resistance against Meloidogyne spp. of two varieties of lettuce Grand Rapids and Salinas 88, and the resistance of three varieties of common bean Aporé, Macarrão Atibaia and Ouro Negro, which have previously been studied in the University Federal University of Lavras (UFLA), Brazil. Furthermore this study will assess the possibility of resistance of a common bean cultivar, Cornell 49242, which has not been previously tested. As a method of controlling all the tests carried out two cultivars were used - Regina 71 for lettuce and Bolinha for common bean. In order to characterize the resistance, two experiments were carried out. Firstly, both crops were confronted with 11 populations of Meloidogyne incognita and M. javanica in a pot experiment. Secondly, a field conditions experiment was used to observe the behaviour of the different cultivars under different densities of Meloidogyne incognita. The results confirmed the resistance of the Grand Rapids and Salinas 88 lettuce cv to nematode populations from Almeria, Murcia and Catalonia., as they obtained lower nematode reproductions in the pot experiment and reduced the soil population in the field experiment. The common bean cultivars showed more diverse results. Aporé cv. proved to be resistant in all experiments. The results for Macarrão Atibaia and Ouro Negro showed their slight resistance and susceptibility (of the 45%) to the majority of the nematode populations used in the pot experiment. In field conditions the results differed. Ouro Negro was slightly resistant, but Macarrão Atibaia behaved as susceptible with an 81.9% of reproduction compared to Bolinha (susceptible cultivar of control). The cultivar Cornell 49242 behaved as susceptible in front the majority of the Meloidogyne spp. populations of the pot experiment.
