Rezistenţa diferiţilor hibrizi de floarea-soarelui la unii agenţi fitopatogeni, în condiţii naturale de cultivare

  • Aliona CUCEREAVÎI
  • Ana MUTU Universitatea de Stat „Dimitrie Cantemir”, Republica Moldova
  • Luxiţa RÎŞNOVEANU Staţiunea de Cercetare-Dezvoltare Agricolă Brăila, România
  • Maria JOIŢA-PĂCUREANU Institutul Naţional de Cercetare şi Dezvoltare Agricolă, Fundulea, România
  • Steliana CLAPCO Universitatea de Stat „Dimitrie Cantemir”, Republica Moldova
  • Aliona CUCEREAVÎI AMG-Agroselect Comerţ, Republica Moldova
  • Maria DUCA Universitatea de Stat „Dimitrie Cantemir”, Republica Moldova

Abstract

Abstract. Sunflower is one of the most widespread oil crops on the world, with multiple production limiting factors and a wide range of phytopathogens which can cause a lot of serious economic damage. In this study the resistance of 39 sunflower hybrids, 20 from Romania (NARDI Fundulea) and 19 from the Republic of Moldova (AMG-Agroselect Comert), was evaluated for different pathogens attack under natural infection conditions on experimental fields of Braila Research and Development Station (Romania). Romanian hybrids have shown higher resistance levels to Phoma, Phomopsis and Botrytis, the percent of plants with infection symptoms being of 70%, 45% and 15%, respectively, in comparison with the hybrids from the Republic of Moldova (90%, 75% and 65%, respectively). By comparative analysis, the hybrids from the Republic of Moldova showed a high level of resistance to broomrape, the attack frequency ranged between 0 - 12.6%, compared to those from Romania with values ranging from 2.5% to 68%.


Key words: Helianthus annuus; Hybrids; Orobanche cumana Wallr.; Phoma macdonaldii; Phomopsis helianthi; Botrytis cinerea; Degree of infection.


Rezumat. Floarea-soarelui este una dintre cele mai răspândite culturi oleaginoase din lume, cu multipli factori limitativi ai producţiei, inclusiv o gamă largă de fitopatogeni. În cadrul acestui studiu, pe câmpurile experimentale ale Staţiunii de Cercetare-Dezvoltare Agricolă Brăila (SCDA Brăila) a fost evaluată rezistenţa la atacul diferitor agenţi patogeni, în condiţii de infectare naturală, a 39 de hibrizi de floarea-soarelui, dintre care 20 provin din România (Institutul Naţional de Cercetare-Dezvoltare Agricolă Fundulea) şi 19 din Republica Moldova (AMGAgroselect Comerţ). În condiţiile experienţei, hibrizii din România au demonstrat, în mediu, un grad de rezistenţă mai înalt la Phoma, Phomopsis şi Botrytis, procentul de plante cu simptome de infectare constituind 70%, 45% şi, respectiv, 15% comparativ cu hibrizii din Republica Moldova (90%, 75% şi, respectiv, 65%). Hibrizii din Republica Moldova au manifestat un nivel mai înalt de rezistenţă la lupoaie, cu valori ale frecvenţei atacului de la 0 la 12,6%, faţă de cei din România cu valori cuprinse între 2,5 şi 68%.


Cuvinte-cheie: Helianthus annuus; Hibrizi; Orobanche cumana Wallr.; Phoma macdonaldii; Phomopsis helianthi; Botrytis cinerea; Grad de atac.

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Published
2019-01-29
How to Cite
CUCEREAVÎI, Aliona et al. Rezistenţa diferiţilor hibrizi de floarea-soarelui la unii agenţi fitopatogeni, în condiţii naturale de cultivare. Stiinta agricola, [S.l.], n. 2, p. 17-23, jan. 2019. ISSN 2587-3202. Available at: <https://sa.uasm.md/index.php?journal=sa&page=article&op=view&path%5B%5D=610>. Date accessed: 22 sep. 2019.
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