TITLE:
Identification of Fusarium Species Associated with Onion (Allium cepa L.) Plants in Field in Burkina Faso
AUTHORS:
Konwendé Raïssa Kintega, P. Elisabeth Zida, Vianney W. Tarpaga, Philippe Sankara, Paco Sereme
KEYWORDS:
Allium cepa, Fusarium, Molecular Identification, Biometric Characterization, Fungal Rot
JOURNAL NAME:
Advances in Bioscience and Biotechnology,
Vol.11 No.3,
March
30,
2020
ABSTRACT: Many fungi limit onion production in Burkina Faso.
This study aims to identify the main Fusarium species associated with onion plant in field in order to determine those
involved in seedling
damping-off and bulb rot, and develop adequate management strategies of these
diseases. For this purpose, 36 isolates of Fusarium were isolated from onion
plants in 17 sites and subjected to molecular analysis and biometric
characterization. The results revealed that the isolates belong to five Fusarium species: Fusarium oxysporum (44.44%
of the isolates), Fusarium proliferatum (41.66%), Fusarium solani (5.55%), Fusarium fujikuroi (5.55%) and Fusarium
thapsinum (2.77%). Fusarium oxysporum, F. proliferatum, F. solani and F. fujikuroi had faster mycelial development, with a growth rate of
7.72 - 8.27 mm/d, than F. thapsinum (6.52 mm/d). Conidia of F. oxysporum, F. proliferatum and F. solani were longer (4.74 - 5.96 μm) than those of F. fujikuroi and F. thapsinum (3.20 - 4.04
μm). Fusarium solani and F. oxysporum, respectively, had the largest and most partitioned conidia.