Severity of late blight (Phytophthora infestans /Mont./ de Bary) and early blight of potato (Alternaria solani Sorauer A. alternata/Fr./Keissler) in three potato cultivars under differentiated soil and foliar fertilization

• Autorzy: Cwalina-Ambroziak B. , Bogucka B.

Warianty tytułu

PL

Nasilenie zarazy ziemniaka (Phytophthora infestans) i alternariozy (Alternaria spp.) na trzech odmianach ziemniaka przy zróżnicowanym nawożeniu doglebowym i dolistnym

• Języki publikacji: EN

Abstrakty

EN

Late blight (Phytophthora infestans /Mont./ de Bary) and early blight of potato (Alternaria solani Sorauer, A. alternata /Fr./ Keissler) belong to very severe potato diseases, which are able to decimate potato plantations in Poland and worldwide. In a strict plot experiment, run from 2008 to 2010, the severity of late blight (Phytophthora infestans) and early blight (Alternaria spp.) was determined, during the growing season, on three potato cultivars: medium-early cv. Adam, medium-late cv. Pasja Pomorska and late cv. OElêza, which received NPK soil fertilization (two fertilization levels) and foliar nutrition consisting of complex fertilizers with micronutrients (Basfoliar 12-4-6, ADOB Mn, Solubor DF). The extent to which the pathogens infected potato plants was evaluated twice during each growing season, on a 9-degree scale (PIETKIEWICZ 1985), and the results (means from two observations) expressed as a percentage represented an infestation index. During the first two seasons, the late blight symptoms were significantly less severe on the late and medium- late rather than on the medium-early cultivar. In the last year, the cultivars Adam and OElêza proved to be the least infected by P. infestans. Differences in the intensity of early blight of potato on the examined potato cultivars appeared in the third year, when cv. Adam proved to be the healthiest variety. Some non-significant differences were demonstrated in the severity of the diseases depending on the applied foliar fertilization and the levels of NPK fertilization.

PL

Zaraza ziemniaka (Phytophthora infestans /Mont./ de Bary) i alternarioza (Alternaria solani Sorauer, A. alternata /Fr./ Keissler) należą do groźnych chorób ziemniaka, dewastujących uprawy tego gatunku w kraju i na świecie. W ścisłym doświadczeniu poletkowym (2008-2010) w okresie wegetacji określano nasilenie zarazy ziemniaka (Phytophthora infestans) i alternariozy (Alternaria spp.) na trzech odmianach ziemniaka: średnio wczesnej Adam, średnio późnej Pasja Pomorska i późnej Ślęza nawożonych doglebowo NPK (dwa poziomy nawożenia) i dokarmianych wieloskładnikowych nawozami dolistnymi z mikroelementami (Basfoliar 12-4-6, ADOB Mn, Solubor DF). Porażenie przez patogeny oceniano dwukrotnie w okresie wegetacji wg 9-stopniowej skali (Pietkiewicz 1985), a wyniki (średnie z dwóch obserwacji) podano w procentach jako indeks porażenia. Zanotowano istotnie mniejsze nasilenie zarazy na roślinach późnych odmian niż na średnio wczesnej w pierwszych dwóch analizowanych sezonach wegetacyjnych oraz mniejsze nasilenie tej choroby na roślinach średnio wczesnej i późnej odmiany niż średnio późnej w ostatnim roku badań. Zróżnicowanie w nasileniu alternariozy na badanych odmianach ziemniaka stwierdzono w ostatnim roku badań, a najzdrowsza okazała się odmiana Adam. Stwierdzono nieistotne zróżnicowanie w nasileniu chorób w zależności od stosowanego nawożenia dolistnego i poziomów nawożenia mineralnego NPK.

• Wydawca: -
• Czasopismo: Journal of Elementology
• Rocznik: 2012
• Tom: 17
• Numer: 3
• Opis fizyczny: p.379-388,ref.

Twórcy

autor

Cwalina-Ambroziak B.

• Chair of Phytopathology and Entomology, University of Warmia and Mazury in Olsztyn, Prawochenskiego 17, 10-720 Olsztyn, Poland

autor

Bogucka B.

• Chair of Agrotechnology and Crop Production Management, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland

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