Isolation, characterization and larvicidal potential of indigenous soil inhabiting bacteria against larvae of southern house mosquito (Culex quinquefasciatus Say)

Larvicidal potential, toxicological assessment, and molecular docking studies of four Egyptian bacterial strains against Culex pipiens L. (Diptera: Culicidae)

“…Additionally, the extensive paralysis on the midgut epithelium layer might be the major reason for the mortal of C. pipiens , in addition to midgut deterioration, dropping the function of midgut and feeding refraining with various microorganisms 34 , Bacillus subtilis (MH370499) and Streptomyces griseoruber (MH370498) 12 . This deterioration is due to microbial peptides and carbohydrates that increase the pH level (Alkaly) in the insect gut, leading the insects to lose the ability to grow and reproduction 35 . It is generally acknowledged that insects exposed to these products may come into exposure to hazardous substances that affect a variety of Proteins (including enzymes, receptors, signaling molecules, ion channels, and structural proteins) as well as nucleic acids, biomembranes, and other cell components 24 .…”

Larvicidal potential and molecular docking analysis of metabolites from new Egyptian bacterial strains as effective biological control agents against Culex pipiens (L: Diptera)

“…Additionally, the extensive paralysis on the midgut epithelium layer might be the major reason for the mortal of C. pipiens, in addition to midgut deterioration, dropping the function of midgut and feeding refraining with various microorganisms 34 , Bacillus subtilis (MH370499) and Streptomyces griseoruber (MH370498) 12 . This deterioration is due to microbial peptides and carbohydrates that increase the pH level (Alkaly) in the insect gut, leading the insects to lose the ability to grow and reproduction 35 . It is generally acknowledged that insects exposed to these products may come into exposure to hazardous substances that affect a variety of molecular targets in a somewhat generic manner.…”

Relative activity of 15 bacterial strains against the larvae of Helicoverpa armigera, Spodoptera exigua, and Spodoptera litura (Lepidoptera: Noctuidae)

“…During spore formation, a Bt bacterium produces one or more insecticidal crystal proteins (ICPs), which account for 25% of the dry weight of the bacteria. These ICPs are mainly encoded by the cytolytic protein gene family ( cyt ) and cry proteins ( cry ) (Betz et al 2000, Sanchis and Bourguet 2008, Crickmore et al 2020, Iftikhar et al 2023). Some of these toxin proteins are highly toxic to some agricultural pests, and different types of toxin proteins have specific targets; however, they are safe for mammals and environmentally friendly (Sanchis 2011, Palma et al 2014).…”

“…At the onset of sporulation and during the stationary growth phase, Bt strains synthesize crystal (Cry) and cytolytic (Cyt) toxins (also known as δ-endotoxins), which are lethal to a wide range of insects, including lepidopterans, dipterans, and coleopteran larvae (Bravo et al 2007, Majeed et al 2018, Iftikhar et al 2023). Other toxins, including vegetative insecticidal proteins (Vips), are also produced during vegetative growth.…”