The aim of this work was to study the production of the bioinsecticide using the aerobic cultivation. Two-stage cultivation process was used: aerobic vegetative growth and end-phase of sporulation (with aeration and without aeration). The cuts of working volume evaluated were 20, 40, 60 and 80 %. The highest value of spore concentration (2.17x10 CFU/mL) and spore productivity (7.2x10 CFU/mL.h) ...

recent technological improvements have extended the application range of dielectric permittivity biomass measurements to on-line monitoring of physiological changes during bacterial fermentations. in an industrial fermentation of bacillus thuringiensis, it is important to verify the intactness of bacterial plasmid content in all steps of culture. changes in certain plasmid resident properties o...

Bioinsecticide Bacillus thuringiensis var. kurstaki (Btk) was used for controlling the mosquito species (Anopheles stephensi and Culex quinquefasciatus) which gave a significant (p<0.05) mortality in both species. The higher concentration of Btk was highly effective compared to the control ones. The controlling effect was dose and time dependent. Among the studied mosquitoes the C. quinquefasci...

Entomopathogenic fungi are microbial agents of insect control in nature. They have been used as biologic strategies to manage invasion; however, the challenge is maintain their shelf life and viability when exposed high temperatures, ultraviolet radiation, humidity. Synthesized silver nanoparticles (AgNPs) from fungal extracellular enzymes an alternative using these microorganisms obtain with i...

BACKGROUND Anticarsia gemmatalis is a pest in South America's soybean crops, which could be controlled by the Multinucleopolyhedrovirus of A. gemmatalis (AgMNPV). Currently, its commercial production is based on infected larvae. However, the possibility of using modified baculoviruses in Integrated Pest Management programs has stimulated an interest to develop alternative multiplication process...

The entomopathogenic fungus Fusarium cf. solani can be used to control brown planthopper. study aim obtain the frequency of spraying against planthopper at different altitudes. Experiment by planting IR 64 seedlings on plots 4 m x m, spacing 25 cm cm, 10 tons compost/ha, and 100 % N, P, K. experiment was carried out with a 2 factors RCBD. Factor I is land altitude &lt; above sea level (P1), – 5...