Details

Autor(en) / Beteiligte

• Abrar, A
• Sarwar, S
• Abbas, M
• Chaudhry, H
• Ghani, N
• Fatima, A
• Tahir, A

Titel

Identification of locally isolated entomopathogenic Fusarium species from the soil of Changa Manga Forest, Pakistan and evaluation of their larvicidal efficacy against Aedes aegypti/ Identificacao de especies de Fusarium entomopatogenicas localmente isoladas do solo da Floresta de Changa Manga, Paquistao e avaliacao de sua eficacia larvicida contra Aedes aegypti

Ist Teil von

• Brazilian journal of biology, 2023-01, Vol.83

Ort / Verlag

Association of the Brazilian Journal of Biology

Erscheinungsjahr

2023

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Dengue fever vectored by the mosquito Aedes aegypti is one of the most rapidly spreading insect-borne diseases. Current reliance of dengue vector control is mostly on chemical insecticides. Growing insecticide resistance in the primary mosquito vector, Aedes aegypti, limits the effectiveness of vector control through chemical insecticides. These chemical insecticides also have negative environmental impacts on animals, plants and human health. Myco-biocontrol agents are naturally occurring organisms and are found to be less damaging to the environment as compared to chemical insecticides. In the present study, entomopathogenic potential of local strains of fungi isolated from soil was assessed for the control of dengue vector. Local fungal isolates presents better alternative to introducing a foreign biocontrol strain, as they may be better adapted to environmental conditions of the area to survive and may have more entomopathogenic efficacy against target organism. Larvicidal efficacy of Fusarium equiseti and Fusarium proliferatum was evaluated against Aedes aegypti. Local strains of F. equiseti (MK371718) and F. proliferatum (MK371715) were isolated from the soil of Changa Manga Forest, Pakistan by using insect bait method. Larvicidal activity of two Fusarium spp. was tested against forth instar larvae of A. aegypti in the laboratory, using concentrations [10.sup.5], [10.sup.6], [10.sup.7] and [10.sup.8] conidia /ml. [LC.sub.50] values for F. equiseti after 24h, 48h, 72h and 96h of exposure were recorded as 3.8x [10.sup.8], 2.9 * [10.sup.7], 2.0 * [10.sup.7], and 7.1 * [10.sup.6] conidia /ml respectively while [LC.sub.50] values for F. proliferatum were recorded as 1.21 * [10.sup.8], 9.6 * [10.sup.7], 4.2 * [10.sup.7], 2.6 * [10.sup.7] conidia /ml respectively after 24h, 48h, 72h and 96h of exposure. The results indicate that among two fungal strains F. equiseti was found to be more effective in terms of its larvicidal activity than F. proliferatum against larvae of A. aegypti.