Meloidogyne incognita report on 'IAC 766-Campinas' rootstock in the State of Pernambuco and reaction of grape rootstocks and cultivars to Meloidogyne spp./Registro da ocorrencia de meloidogyne incognita no porta-enxerto 'IAC 766 Campinas' no estado de pernambuco e reacao de porta-enxertos e de cultivares copa de videira a Meloidogyne spp

• Published in: Revista Brasileira de fruticultura Vol. 34; no. 3; p. 750
• Main Authors: Somavilla, Lucia, Gomes, Cesar Bauer, Quecini, Vera Maria
• Format: Journal Article
• Language: Spanish
• Published: Sociedade Brasileira de Fruticultura 01.09.2012
• ISSN: 0100-2945

The occurrence of root-knot nematode Meloidogyne incognita (Est. I2) is reported in grapevine in Petrolina municipality, State of Pernambuco. Grape plants of Festival cultivar grafted on the 'IAC 766 Campinas' rootstock attacked by M. incognita exhibited symptoms of less vigorous growth, yellowing and sparse leaves and multiple galls in the root system in an area cultivated with jack-bean (Canavalia ensiformis) also infected by the same nematode. In order to evaluate resistance of four tropical rootstocks, eight temperate and two cultivars Chardonnay and Niagara Rosada in reaction to M. incognita and M. arenaria, this study was carried out. Seedlings of the investigated grapevine genotypes were maintained in pots with sterilized soil and subsequently inoculated with 10,000 eggs + J2 of M. incognita or M. arenaria per plant in a six replicate design. Eight months after nematode inoculation, each plant was evaluated by counting gall and eggs. The final number of eggs (FP) of each Meloidogyne specie was calculated and the reproductive factor (RF = FP/ IP), determined. Among the tested rootstocks, 'Harmony', 'Salt Creek', '1103 Paulsen', 'IAC 572-Jales', 'IAC 313-Tropical', 'K5BB Kober', 'SO4', were resistant (RF < 1.00) and, 'Solferino', immune (RF = 0.00) to M. incognita, the remaining rootstocks were susceptible to the nematode. With exception of '106-Traviu', '420 A', 'Rupestris du Lot' and '1103 Paulsen', all tested rootstocks were resistant (RF > 1.00) to M. arenaria. In contrast, both tested grapevine scion cultivars were susceptible to the investigated Meloidogyne species. Index terms: occurrence, root-knot nematode, resistance, Vitis spp. Relata-se a ocorrencia de Meloidogyne incognita (Est. I2) em pomar de videira na cidade de Petrolina, Pernambuco. Plantas da cultivar Festival enxertadas sobre 'IAC 766-Campinas', atacadas por Meloidogyne incognita, apresentavam sintomas de menor vigor, folhas amarelecidas e folhagem mais esparsa, e raizes com numerosas galhas em meio ao cultivo de feijao-de-porco (Canavalia ensiformis), tambem atacado pelo nematoide. Com o objetivo de avaliar a resistencia de quatro porta-enxertos tropicais, oito de clima temperado, e as cultivares Niagara Rosada e Chardonnay quanto a reacao a M. incognita e M. arenaria, em casa de vegetacao, realizou-se este trabalho. Mudas das videiras, mantidas em vaso com solo esterilizado, foram inoculadas com 10.000 ovos + J2 deM. incognita ouM. arenaria por planta. Decorridos oito meses da inoculacao, cada planta foi avaliada quanto ao numero de galhas e numero de ovos por planta, determinandose, a seguir, o fator de reproducao de cada especie do nematoide (FR = populacao inicial/populacao final) nos diferentes materiais testados. Entre os porta-enxertos avaliados, 'Harmony', 'Salt Creek', '1103 Paulsen', 'IAC 572-Jales', 'IAC 313-Tropical', 'K5BB Kober' e 'SO4', foram resistentes (FR < 1,00) e 'Solferino', imune (FR = 0,00) a M. incognita, sendo os demais suscetiveis ao nematoide. Quando se avaliou a reacao da videira a M. arenaria, exceto '106-Traviu', '420 A', 'Rupestris du Lot' e '1103 Paulsen', os demais portaenxertos foram resistentes (FR > 1,00) ao nematoide. No entanto, ambas as cultivares copa foram suscetiveis as duas especies de Meloidogyne testadas. Termos para indexacao: Ocorrencia, resistencia, nematoide das galhas, Vitis spp.