Synergism between Metarhizium anisopliae (Deuteromycota: Hyphomycetes) and Boric Acid against the German Cockroach (Dictyoptera: Blattellidae)

2002 ◽  
Vol 23 (3) ◽  
pp. 296-302 ◽  
Author(s):  
Ludek Zurek ◽  
D.Wes Watson ◽  
Coby Schal
Keyword(s):  
Boric Acid ◽  
Metarhizium Anisopliae ◽  
German Cockroach

Isolation, Identification, and Virulence of a New Metarhizium anisopliae Strain on the German Cockroach

2018 ◽  
Author(s):  
Xian C Zhang ◽  
Xiao X Li ◽  
Yi W Gong ◽  
Ya R Li ◽  
Kai L Zhang ◽  
...  
Keyword(s):  
Metarhizium Anisopliae ◽  
German Cockroach

scholarly journals Synergism between Hydramethylnon and Metarhizium anisopliae and Their Influence on the Gut Microbiome of Blattella germanica (L.)

Insects ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 538 ◽  
Author(s):  
Yu Chao ◽  
Mingyue Wang ◽  
Wei Dai ◽  
Fengyue Dong ◽  
Xuejun Wang ◽  
...  
Keyword(s):  
Topical Application ◽  
Gut Microbiome ◽  
Metarhizium Anisopliae ◽  
Blattella Germanica ◽  
German Cockroach ◽  
Cell Wall Component ◽  
Fungal Cell ◽  
Major Mechanism ◽  
Combination Treatments ◽  
Cockroach Blattella Germanica

(1) Background: The widespread use of insecticides has cause extensive resistance in German cockroach (Blattella germanica) populations globally. Biological control has the potential to mitigate insecticide resistance, and Metarhizium anisopliae (Meschn.) Sorokin, an entomopathogenic fungus, alone and in combination with various insecticides, has shown good effects against cockroaches. (2) Methods: This experiment compared the cumulative mortality after infecting B. germanica with M. anisopliae conidia by two routes, per os and topical application. To probe the mechanisms that underlie the synergism between M. anisopliae and hydramethylnon, we conducted dose–response assays with cockroaches fed combinations of M. anisopliae and hydramethylnon and characterized the gut microbiomes of the treated cockroaches. (3) Results: The study showed that the mortality with per os infection was lower than that with topical application. In addition, the combination of M. anisopliae and hydramethylnon had a synergistic effect in 16 treatments. The gut microbiome was also altered by hydramethylnon treatment. The abundance of Parabacteroides and Enterococcus declined with the hydramethylnon and combination treatments, which are known to have anti-inflammatory and antifungal activities. The abundance of Alistipes, which is a fungal cell wall component, significantly increased in these treatments. (4) Conclusions: Therefore, we speculate that the major mechanism underlying this synergism is hydramethylnon promoting the survival of M. anisopliae in the harsh gut environment and enhancing its virulence for German cockroaches by altering the gut microbiome. This may provide a method for the fight against B. germanica and lay the foundation for the development of new baits.

scholarly journals Study the effect of some acids on the viability of Beauveria bassiana (Bals.) Vuill. and Metarhizium anisopliae and their growth ability on chitin agar

2014 ◽  
Vol 8 (1) ◽  
pp. 37-42
Author(s):  
Hussein Magtoff Diwan ◽  
Majed Ibrahim Abdela ◽  
Belasim Ahmed Abas ◽  
Husein Neayma Keshmer
Keyword(s):  
Citric Acid ◽  
Oxalic Acid ◽  
Boric Acid ◽  
Beauveria Bassiana ◽  
Metarhizium Anisopliae ◽  
Maximum Rate ◽  
Radial Growth ◽  
The Other ◽  
Hand Control ◽  
Growth Ability

This study aimed to evaluate the effects of three acids; Citric, Oxalic and Boric acids 0.05% on the viability of Beauveria bassiana and Metarhizium anisopliae spores after 1,2, 3 days of exposure 27±1 C° and the growth on chitin agar was obtained after 5 days at 26 ± 1C°.The results showed that the rate of viability of B. bassiana and M. anisopliae with boric acid was 312.3,209,150.3 colony/ml and 318,294.7,157.5 colony/ml respectively during three period time of in comparison with control and spore suspensions with the other acids. Spores of both fungi B. bassiana and M. anisopliae showed maximum rate of viability in the suspension supplied with citric acid which were 266 and 293.6 colony/ml, respectively after 1day of exposures to this acid in comparison with viability of control and other periods. Spores viability was lost with oxalic acid. On the other hand, control recorded highest rate of radial growth in the control was 1.92, 4.4 cm on the medium chitin agar after 3 days of incubation in comparison with other treatments. Both fungi showed best rate of radial growth 3.12, 1.88cm after 1and 3 days of exposure to citric acid, respectively in comparison with other treatments. There were no such growths on chitin agar after exposure the oxalic acid.

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