ORIGINAL ARTICLE
First notice of Phytophthora aerial blight and crown rot on pansies in Poland
 
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Research Institute of Pomology and Floriculture, Pomologiczna 18, 96-100 Skierniewice, Poland
CORRESPONDING AUTHOR
Leszek B. Orlikowski
Research Institute of Pomology and Floriculture, Pomologiczna 18, 96-100 Skierniewice, Poland
 
Journal of Plant Protection Research 2010;50(2):233–237
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ABSTRACT
Phytophthora cactorum was detected on ⁹⁄₁₀ of pansies showing yellowing of leaves and crown rot symptoms and constituted about 90% of isolates obtained. Botrytis cinerea, Fusarium avenaceum, F. solani and Pythium ultimum were also isolated from diseased tissues. Using rhododendron leaves as the bait, P. cactorum was detected in pansy substratum as well as from soil under the mata. Isolates obtained from diseased plants, substratum and soil under mata colonized leaves, stem parts and roots of pansy. Necroses spread faster on organs inoculated with cultures from plants and substratum. Among 25 cultivars inoculated with P. cactorum, disease symptoms did not occur on 3 of them, whereas the fastest spread of necrotic spots (3.8 mm/24 hrs) was noticed on 3 cultivars. Isolates of P. cactorum from Begonia semperflorens and Malus domestica colonized leaf petioles of pansy with significantly faster spread when isolates from begonia and pansy were used for inoculation.
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
 
REFERENCES (11)
1.
Boersma J.G.,Cooke D.E.L., Sivasithamparam K. 2000. A survey of wildflower forms in the south-west of Western Australia for Phytophthora spp. associated with root rots. Aust. J. Exp. Agric. 40: 1011–1019.
 
2.
Hwang J., Benson D.M. 2005. Identification, mefenoxam sensitivity, and compatibility type of Phytophthora spp. Attacking floriculture crops in North Carolina. Pl. Dis. 89: 185–190.
 
3.
Leahy R.M. 1998. Black root rot of pansies. Pl. Pathol. Circ. 387: 1–2.
 
4.
Mullen J., Hagan A. 2001. Diseases of pansies and their control. ACES Homepage ANR 1214: 1–8.
 
5.
Orlikowski L.B. 2006. Relationship between source of water used for plant sprinkling and occurrence of Phytophthora shoot rot and tip blight in container-ornamental nurseries. J. Plant Protection Res. 46: 163–168.
 
6.
Orlikowski L.B., Duda B., Oszako T. 2004. Występowanie Phytophthora cactorum na jarząbie zwyczajnym (Sorbus aucuparia). Sylwan 10: 67–72.
 
7.
Orlikowski L.B., Ptaszek M., Trzewik A. 2010. Pelargonium grandiflorum – nowy gatunek żywicielski dla Phytophthora cactorum w Polsce. Zesz. Probl. Post. Nauk Rol. (in print).
 
8.
Orlikowski L.B., Trzewik A., Orlikowska T. 2007. Water as potential source of Phytophthora citricola. J. Plant Protection Res. 47 (2): 125–132.
 
9.
Schubert T.S. 1983. Phytophthora crown rot of petunia and snapdragon. Plant Pathol. Crc. 254: 1–2.
 
10.
Trzewik A., Wiejacha K., Orlikowski L.B., Orlikowska T. 2006. Identification of five Phytophthora species, causing agents of diseses of nuresy perennials, trees and shrubs on the base of DNA markers amplified with non-specific primers. Phytopathol. Pol. 41: 27–37.
 
11.
Wolf F.A. 1910. Fusarium disease of pansy. Mycologia 2: 19–22.
 
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