1991). Only recently have investigations focused on relationships between B. bassiana and the corn plant. Field and greenhouse studies were conducted to determine the proBeauveria bassiana forms an endopytic relationship with clivity of Bacillus thuringiensis (Bt) (Berliner)-transgenic corn (Zea mays L.) to form an endophytic relationship with Beauveria bassiana, the corn plant and provides sea...

Essential oils have antifungal and antipathogenic effects and therefore are targets in plant pathology research for their potential uses as natural substitutes for inorganic plant pesticides. Beauveria bassiana, an entomopathogenic fungus, can endophytically colonize a vast number of plant species and trigger induced systemic resistance against plant pathogens. Spore germination is the most vul...

The beetle Alphitobius diaperinus (Panzer), considered a worldwide pest in the poultry industry, is difficult to control and it is a vector for pathogens. The objective of this study was to evaluate the biological control of the lesser mealworm, by strains of fungi Beauveria bassiana, Cladosporium sp. and Trichoderma sp. Larvae and adults of the A. diaperinus were inoculated with suspensions of...

In this study, five morphological types of circulating hemocytes were recognized in the hemolymph of the adult sunn pest, Eurygaster integriceps Puton (Hemiptera: Scutelleridae), namely prohemocytes, plasmatocytes, granulocytes, adipohemocytes, and oenocytoids. The effects of the secondary metabolites of the entomopathogenic fungus Beauveria bassiana on cellular immune defenses of Eurygaster in...

This research tested the suppressive ability of Beauveria bassiana (Balsamo) Vuillemin alone and in combination with diatomaceous earth against the red flour beetle, Tribolium castaneum (Herbst). Adults did not show a dose response to B. bassiana, and the addition of diatomaceous earth (DE) did not result in a significant increase in mortality. Against larvae, however, DE at 190 mg/kg grain enh...

Purpureocillium lilacinum and Beauveria bassiana were isolated from lung sampled at necropsy of a 12 year-old female loggerhead sea turtle (Caretta caretta) that had displayed abnormal buoyancy. Histopathologic evaluation revealed pleuritis and pneumonia with non-melanized, septate hyphae and fruiting structures identical to those of P. lilacinum. This case emphasizes the importance of a histol...

The in vitro effect of five commonly used herbicides viz., pyridate, fluazifop-P-butyl, foramsulfuron, tembotrione and Smetolachlor on mycelial growth of entomopathogenic fungus Beauveria bassiana (ATCC 74040) was evaluated each at different concentrations: 100, 75, 50, 25, 12.5, 6.25 and 0% of recommended field application rate on PDA agar plates at 15 and 25°C. The herbicides tested were clas...

the european corn borer (ecb) is one of the most important insect pests of corn and some other crops such as rice in iran. this pest is one of the most important hosts of the entomopathogenic fungus beauveria bassiana, a well known fungal entomopathogen with high host range and considerable potential in insect pest control. in an isolate selection program of fungal isolates against ecb, ten iso...

entomopathogenic fungi produce secondary metabolites which may bioactively help fungus in its virulence toward insect hosts. beauveria bassiana produces several toxic low molecular compounds in vitro as well as in vivo, the most important of them is beauvericin. the beh isolate of the fungus was selected for beauvericin assay. beauvericin was obtained from surface and submerged cultures of the ...

The enzymatic formation of the cyclodepsipeptide beauvericin was demonstrated in cell-free extracts from Beauveria bassiana. In analogy to the enniatin synthetase system formation of beauvericin is strictly dependent on the presence of the constituent amino and hydroxy acid, S-adenosylmethionine, and ATP/Mg2+. Synthesizing activity could be enriched about 12-fold by fractional ammonium sulfate ...