Volume 12, Numéro 1, Pages 2834-2841

Isolation And Identification Of Endophytic Fungi From Borago Officinalis L. And Evaluation Of Their Bioinsecticidal Effect Against Mosquito Larvae Culiseta Longiareolata (macquart)

Auteurs : Toubal Souheyla . El Haddad Djillali . Bouchenak Ouahiba . Sadaoui Nesrine . Boumaza Sarah . Benhabyles Narimen . Arab Karim .


Abstract Description of the subject: Endophytic fungi and their products present a promising alternative to chemical control of mosquito larvae and adults. Objective : This study aims to isolate and to identify the endophytic fungi from Borago officinalis L. (B. officinalis L.), and then to evaluate their bioinsecticidal power against fourth stage (L4) mosquito larvae of Culiseta longiareolata (Macquart) (Cs. longiareolata). Methods : The endophytic fungi were isolated from the leaves of B. officinalis L. collected from the wilaya of Boumerdes, Algeria and then identified by macroscopic and microscopic examinations. The laboratory, bioassays were performed with six different concentrations (102, 103, 104, 105, 106, 107 spores/ml). Results : The three endophytic fungi that were isolated and identified are Fusarium sp. (Bo1) ; Penicillium sp. (Bo2) and Cladosporium sp. (Bo3). The best larvicidal activity is attributed to Fusarium sp. (LC50 = 6.45 × 105 spores/ml), followed by Penicillium sp. (LC50 = 1.99 × 109 spores/ml) and finally Cladosporium sp. (LC50 = 6.30 × 1010 spores/ml). The LT50 values ranged from 11 h to 7 days. (P˂0.01) Conclusion : These findings indicate that the leaves of B. officinalis L. can be a niche of several endophytic fungi with great efficiency against mosquito larvae, which suggests their use as an alternative to chemical control, more economical and less harmful for humans and environment.

Mots clés

vector-borne diseases ; B. officinalis L. ; endophytic fungi ; Cs. longiareolata ; biological control