Larvicidal activities of local <i>Bacillus thuringiensis</i> isolates and toxins from nematode bacterial symbionts against the Rift Valley fever vector, <i>Aedes caspius</i> (Diptera: Culicidae)

Ahmed, Ashraf M.; El-Kersh, Talat A.; Hussein, Heba A.; Ayaad, Tahany H.; El-Sadawy, Hanan A.; Ibrahim, Mohamed S.; Amoudi, Mikky A.; Aseery, Ghaleb M

doi:10.1080/15627020.2020.1858720

Cited by 1 publication

(1 citation statement)

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“…Since the majority of the larvicidal bacteria for mosquito vectors are spore-forming bacteria, their spores can be preserved for a longer time, so these bacterial isolates can be cultured easily by supplementing them with appropriate nutrients and minerals. The colony morphology of the Bti VEVP-60 shows similarity with the international reference strain of Bti-H14 (IPS-82) i.e., white, almost circular with fine irregular margins (Ahmed et al, 2021). The colony morphology of the other two isolates show similarity to the reference strain Bti-H14; but it is to be noted that the three isolates showed varied potency across different mosquito vectors.…”

Section: Resultsmentioning

confidence: 87%

A Novel Mosquiocidal Bacterium from Soils of Vellore, Tamil nadu, India

Hemaladkshmi,

Aneha,

Bora

et al. 2023

IJE

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In this study, intensive screening for mosquitocidal bacteria from different agricultural soils of Vellore district of Tamil Nadu was carried out to isolate potential mosquitocidal bacteria. From a total of 315 soil samples, 945 bacterial isolates were cultured, out of which three isolates showed mosquitocidal activity. One most potential mosquitocidal isolate was selected out of these and studied further. The isolate was identified by ilvD primer and phylogenetic tree as Bacillus thuringiensis israelensis. This new isolate exhibited effective toxicity against Aed. aegypti, An. stephensi, and Cx. quinquefasciatus. The LC50 values were 0.757, 0.52 and 0.165 mg/ l respectively. Similarly, the LC90 values were 0.963, 0.794 and 0.355 mg/l, respectively. These results depict that the new isolate (Bti) VEVP-60 is a good candidate for mosquito control.

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Section: Resultsmentioning

confidence: 87%