Evaluation of locally available tomato varieties and introductions for resistance to bacterial speck and bacterial spot diseases in Tanzania

• Autorzy: Shenge K C , mabagala R.B. , Mortensen C.N.

Warianty tytułu

PL

Ocena odpornosci dostepnych introdukowanych odmian pomidora na bakteryjna cetkowatosc [Pseudomonas syringae pv.tomato] i bakteryjna plamistosc [Xanthomonas vesicatoria] w Tanzanii

• Języki publikacji: EN

Abstrakty

EN

Four tomato (Lycopersicon esculentum Mill.) varieties commonly grown by tomato farmers in Tanzania were evaluated for resistance to bacterial speck (Pseudomonas syringae pv. tomato) and bacterial spot (Xanthomonas vesicatoria) diseases, along with five introductions under screenhouse and field conditions. The four tomato varieties were Cal J, Moneymaker, Tanya and Roma VF. Seeds of the tomato varieties were purchased from seed vendors in the open market. The introductions that were included in the study were Bravo, Taxman, Stampede (from Sakata-Mayford Seeds (Pty) Ltd, South Africa), Torquay and BSS436 (from Bejo Zaden B.V., The Netherlands). In the screenhouse, results indicated that all the tomato varieties were susceptible to the two diseases, and suffered moderate to severe infection levels. The performance of the introductions against bacterial speck under screenhouse conditions was variable. All the introductions showed high levels of susceptibility to bacterial spot. Under field conditions, incidence of the diseases was high in all the locally available varieties tested, averaging 87% for bacterial spot and 82.3% for bacterial speck. The results of this study indicate that all the locally available tomato varieties included in the study were highly susceptible to bacterial speck and bacterial spot diseases.

PL

Oceniano odporność 4 odmian pomidora (Lycopersicon esculentum Mill.) uprawianych przez farmerów w Tanzanii oraz 5 odmian introdukowanych na bakteryjną cętkowatość (Pseudomonas syringae pv. tomato) i bakteryjną plamistość (Xanthomonas vesicatoria). Doświadczenia prowadzono w warunkach polowych oraz pod osłoną/ na występujących 4 odmianach: Cal J, Moneymaller, Tanya i Roma VF. Do badań wykorzystano nasiona dostępne w handlu. Jednocześnie oceniano odporność 5 odmian introdukowanych: Bravo, Taxman, Stampede (z Sakata-Mayford Seeds (Pty) Ltd. Południowa Afryka), Torquay i BSS436 (z Bejo Zaden B.V. Holandia). Wyniki uzyskane pod osłoną wskazywały na wrażliwość wszystkich odmian lokalnych na obydwie choroby, przy czym porażenie oceniono jako umiarkowane do silnego. Wyniki badań odporności introdukowanych odmian na bakteryjną cętkowatość, powodowanych pod osłoną były zmienne. Wszystkie odmiany introdukowane wykazały wysoki poziom wrażliwości na bakteryjną plamistość. W warunkach polowych występowanie chorób na odmianach lokalnych było pospolite i wynosiło 87% dla bakteryjnej plamistości i 82,3% dla bakteryjnej cętkowatości. Wyniki przeprowadzonych badań wykazały, że wszystkie lokalnie dostępne odmiany, które uwzględniono w badaniach, były bardzo wrażliwe na obydwie choroby bakteryjne.

Słowa kluczowe

EN

plant disease; bacterial spot; Lycopersicon esculentum; bacterial speck; tomato variety; plant protection; Pseudomonas syringae pv.tomato; plant resistance; Xanthomonas vesicatoria; tomato

• Wydawca: -
• Czasopismo: Journal of Plant Protection Research
• Rocznik: 2007
• Tom: 47
• Numer: 2
• Opis fizyczny: p.103-111,ref.

Twórcy

autor

Shenge K C

• University of Agriculture, P.O.Box 3005, Morogoro, Tanzania

autor

mabagala R.B.

autor

Mortensen C.N.

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