scholarly journals Evaluation of Resistance to Apple Blotch (Diplocarpon mali) in Malus Species and Varieties

2020 ◽  
Vol 19 (2) ◽  
pp. 151-158
Author(s):  
Kazuyuki Abe ◽  
Shigeki Moriya ◽  
Hiroshi Iwanami ◽  
Satoko Kanematsu
Keyword(s):  
Diplocarpon Mali

Diplocarpon mali. [Distribution map].

2011 ◽  
Author(s):  
Keyword(s):  
North America ◽  
New Brunswick ◽  
Geographical Distribution ◽  
Prince Edward Island ◽  
Uttar Pradesh ◽  
Distribution Map ◽  
Jammu And Kashmir ◽  
New Distribution ◽  
Distribution In Europe ◽  
Diplocarpon Mali

Abstract A new distribution map is provided for Diplocarpon mali Y. Harada & Sawamura. Ascomycota: Helotiales. Hosts: apple (Malus spp.) and flowering quince (Chaenomeles spp.). Information is given on the geographical distribution in Europe (Italy, Mainland Italy, Romania), Asia (China, Anhui, Gansu, Hebei, Heilongjiang, Henan, Hubei, Jiangsu, Jilin, Liaoning, Nei Menggu, Shaanxi, Shandong, Sichuan, Xinjiang, Yunnan, India, Himachal Pradesh, Jammu and Kashmir, Uttar Pradesh, Japan, Honshu, Kyushu, Korea Republic, Taiwan), North America (Canada, New Brunswick, Nova Scotia, Ontario, Prince Edward Island, USA, Wisconsin).

Phenolic responses of resistant and susceptible Malus plants induced by Diplocarpon mali

2013 ◽  
Vol 164 ◽  
pp. 17-23 ◽  
Author(s):  
Lihua Yin ◽  
Yangjun Zou ◽  
Xiwang Ke ◽  
Dong Liang ◽  
Xuan Du ◽  
...  
Keyword(s):  
Diplocarpon Mali

Cytology of infection of apple leaves by Diplocarpon mali

2013 ◽  
Vol 136 (1) ◽  
pp. 41-49 ◽  
Author(s):  
Hua Zhao ◽  
Qingmei Han ◽  
Jie Wang ◽  
Xiaoning Gao ◽  
Chang-Lin Xiao ◽  
...  
Keyword(s):  
Apple Leaves ◽  
Diplocarpon Mali

scholarly journals Determinação do início da proteção das macieiras 'Fuji' para racionalização do controle químico de Diplocarpon mali

2014 ◽  
Vol 40 (2) ◽  
pp. 182-184
Author(s):  
Rosa Maria Valdebenito-Sanhueza ◽  
Geraldine de Andrade Meyer ◽  
Vinícius Adão Bartnicki
Keyword(s):  
Para Determinar ◽  
Diplocarpon Mali

O objetivo do trabalho foi avaliar um nível de controle para determinar o início do uso dos fungicidas no manejo da Mancha Foliar de Marssonina (MFM). O método proposto consistiu no monitoramento semanal de 20 macieiras e, quando em quatro plantas foi detectada a presença de sintomas da doença, foi iniciada a aplicação dos fungicidas com intervalos de 10 dias. Na avaliação do experimento se verificou que todos os tratamentos controlaram a incidência e a severidade da MFM nas folhas. A utilização do nível de controle para MFM reduziu o número de aplicações de fungicidas em 23% quando comparado com os tratamentos realizados pelo método convencional pelos produtores.

scholarly journals First Report of Leaf Blotch Caused by Marssonina coronaria on Apple in Italy

Plant Disease ◽  
2003 ◽  
Vol 87 (8) ◽  
pp. 1005-1005 ◽  
Author(s):  
G. Tamietti ◽  
A. Matta
Keyword(s):  
Potato Dextrose Agar ◽  
Leaf Blotch ◽  
Marssonina Coronaria ◽  
Golden Delicious ◽  
Pure Cultures ◽  
Mist Chamber ◽  
Minor Disease ◽  
Low Sensitivity ◽  
A Minor ◽  
Diplocarpon Mali

During the early summers of 2001 and 2002, in Forno Canavese in northwest Italy, a leaf disease was observed on the old apple cv. Furnas in a domestic orchard. Lesions on the upper side of the leaf were brownish, irregular in size and shape with somewhat dendritic margins, became black, and often coalesced with time. On the underside, lesions were smaller with more definite margins. Beginning in July, scattered acervuli (95 to 170 μm) were observed erupting through the epidermis on the upper side of leaves. Conidia were ampule shaped, 1-septate, constricted at the septum, hyaline, guttulate, and 6.1 to 8.4 × 14.6 to 22.0 μm. Severely diseased leaves abscised prematurely. The fungus was identified as Marssonina coronaria (Ellis & J.J. Davis) J.J. Davis, teleomorph Diplocarpon mali (1) although the conidia were slightly shorter than those originally described for this fungus. Monoconidial isolates were obtained by spreading mini-suspensions of conidia taken from acervuli on malt agar (MA) and transferring single-germinated conidia to MA, potato dextrose agar, V8 agar, or apple leaf agar (ALA). The fungus grew slowly, producing small colonies on V8 and ALA only. On ALA medium, after 3 months incubation at 20 to 22°C, the colonies were 5 to 7 mm in diameter with light brown, irregular margins and dark brown centers bearing acervuli. Conidia from pure cultures were collected, suspended in sterile, distilled water (250,000 ml-1), and sprayed on the leaves of three ‘Golden Delicious’ apple shoots maintained in a mist chamber at 20 to 25°C for 2 weeks. In two independent experiments, the fungus reproduced symptoms like those observed on ‘Furnas’ and was reisolated from acervuli. No symptoms were observed on water-treated controls. To our knowledge, apple leaf blotch has not previously been reported in Italy. Although now it is a minor disease, it could become more important in sustainable crops because of its relatively low sensitivity to copper fungicides (2), the only products that can be used under that program. References: (1) Y. Harada et al. Ann. Phytopathol. Soc. Jpn. 40:412, 1974. (2) J. Ruide et al. China Fruits 2:51, 1997.

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