EFFECT OF A LEAF-SPOT DISEASE CAUSED BY ALTERNARIA-ALTERNATA ON YIELDOF SUNFLOWER IN GREECE

Authors
LAGOPODI AL THANASSOULOPOULOS CC
Citation
Al. Lagopodi et Cc. Thanassoulopoulos, EFFECT OF A LEAF-SPOT DISEASE CAUSED BY ALTERNARIA-ALTERNATA ON YIELDOF SUNFLOWER IN GREECE, Plant disease, 82(1), 1998, pp. 41-44
Citations number
35
Categorie Soggetti
Plant Sciences
Journal title
Plant disease → ACNP
ISSN journal
01912917
Volume
82
Issue
1
Year of publication
1998
Pages
41 - 44
Database
ISI
SICI code
0191-2917(1998)82:1<41:EOALDC>2.0.ZU;2-V
Abstract
Field experiments were conducted during the 1989 to 1993 growing seaso ns in order to determine the effect of natural infections of Alternari a alternata on yield of sunflower (Helianthus annuus). Number of seeds produced per head and seed weight were reduced by 16 to 65% and 15 to 79%, respectively. Number and weight of seeds produced per head were correlated negatively with disease intensity before anthesis. The fung us overwinters in sunflower leaf residues and may present a yearly pro blem for sunflower production in some areas.