Evaluation of strains of Poncirus trifoliata and trifoliate orange hybrids for resistance to Phytophthora root rot

Rao, N. N. R.; Prasad, M. B. N. V.

doi:10.1016/0304-4238(83)90114-0

Cited by 2 publications

(1 citation statement)

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“…이 추출액 배지에서 유자나무 근권 토양에서 분리된 2종의 유자 역병균 YP-1 (P. nicotianae), YP-3 (P. citrophthora)의 균사생장 정도를 조사한 결과, 유자를 포함한 감귤류 대목으로 많이 사용되고 있는 탱자 (Trifoliate orange) 추출액 배지에서 가장 잘 자랐다 (Table2). 탱자는 일반적으로 역병균에 대해 저항성인 것으로 보고되 어 있으나 (RaghavendraRao et al, 1983;Tuzcu et al, 1984;Graham et al, 1990;Hyun et al, 2001), 추출액 배지에 서는 감수성으로 나타나 식물체 접종 결과와 비교, 검토가 필요한 것으로 판단된다. 또한 본 실험에서 사용된 2종의 유자 역병균은 과실과 잎 추출액 배지에서 상이한 균사생장 양상을 나타냈다 (Table 2).…”

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Verifications of Resistance to Phytophthora spp. in 2-year-old Citrus junos Cultivars and Related Species

Kwack

Kim

Kwak

et al. 2018

Korean J. Soil. Sci. Fert.

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Yuzu (Citrus junos) gummosis disease, caused by Phytophthora nicotianae, was first reported in 1997. As known in citrus, Phytophthora is the most fastidious soil-borne pathogen to control. In order to minimize its damage to Citrus spp., integrated pest management (IPM) approach, including fungicide chemicals and resistant cultivars, is necessary. Therefore, in this study we tried to evaluate tolerance of yuzu cultivars and its related species against yuzu Phytophthora. Trifoliate orange was evaluated as a susceptible host to yuzu Phytophthora by both mycelial growth onto extract media and immature fruit inoculation. However, in zoospores spray-inoculation on 2-year-old cuttings tree, trifoliate orange appeared to have a resistant property as showing less than 6% diseased leaf rate. Among yuzu cultivars only 'Namhae No. 1' appeared resistant property against both P. nicotianae and P. citrophthora. The 'Namhae No. 1' showed 5.7% and 10.6% diseased leaf ratio by P. nicotianae and P. citrophthora, respectively. Clearly, in order to reduce damages caused by two yuzu Phytophthora, we suggest that growers may utilize a trifoliate orange as a rootstock and 'Namhae No. 1' as a scion for fruit production.

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