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Infected eggs of Meloidogyne incognita colonized by Paecilomyces marquandii hyphae (A), P. marquandii conidiphores formed on an infected egg (B). Bars = 25 µm. Table 1 Effect of Paecilomyces marquandii on fresh and dry weight, gall and egg mass production and infection of eggs on tomato plants 2 months after inoculation with Meloidogyne incognita.
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Among fungi, species of the genus Paecilomyces are considered as promising biological control agents with high potential to reduce root-knot nematode (RKN) and other nematode populations. In this research we investigated a soil hyphomycetes, Paecilomyces marquandii and its pathogenicity on eggs of RKN in vitro. In greenhouse test, root weight, plan...
Contexts in source publication
Context 1
... of P. marquandii isolate tested in our experiments penetrated the eggs of M. incognita on water agar (Fig. 1, A) and parasitized eggs between 60 to 80% in vitro. Infected eggs contained mycelium inside as well as on their egg shell (Fig. 1, B). Tomato plants inoculated with M. incognita showed significant reduction in their growth (Table 1). The isolate of P. marquandii, increased the top weight and decrease the root weight compared with the ...
Context 2
... of P. marquandii isolate tested in our experiments penetrated the eggs of M. incognita on water agar (Fig. 1, A) and parasitized eggs between 60 to 80% in vitro. Infected eggs contained mycelium inside as well as on their egg shell (Fig. 1, B). Tomato plants inoculated with M. incognita showed significant reduction in their growth (Table 1). The isolate of P. marquandii, increased the top weight and decrease the root weight compared with the nematode control. The weight of roots was significantly higher in plants treated with M. incognita alone which was attributed to the ...
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Citations
... Entomopathogenic fungi are currently considered to be the important factors controlling insect population, and are well suited for being developed as ecofriendly biopesticide (Kumar et al., 2015). Among them, Peacilomyces are important natural control agents and sources of mycopesticides for pests management worldwide (Han et al., 2014;Jamali and Ghasemi, 2016;Sanjaya et al., 2016). To isolate entomopathogenic fungi, susceptible insect host and selective media have been utilizing to the isolation of entomopathogenic fungi from soil. ...
Biocontrol offers an attractive alternative to the use of chemical pesticides in agricultural pest management. The development of high levels of resistance to chemical pesticides have forced researchers to find more alternative biological control agents. The aims of this study were to isolate Paecilomyces spp. with high virulence against diamondback moth (Plutella xylostella) and Oriental leafworm moth (Spodoptera litura), and to investigate suitable agro-industrial residues as a substrate used for solid state fermentation for sporulation of isolates. In this study, Paecilomyces spp. were isolated from soil and insects and identified by morphological and sequencing analyses. The pathogenicity of these isolates was evaluated on Pl. xylostella and S. litura to identify strains with the highest virulence. In addition, agro-industrial residues were used as a cheap substrate for investigating a suitable medium for sporulation on an industrial scale. Six strains of Paecilomyces spp. were isolated including one strain of P. lilacinus and five strain of P. javanicus. P. lilacinus PL01 showed the highest virulence against both Pl. xylostella and S. litura with respective LT50 values of 2.51 and 7.09 days. The five isolated P. javanicus strains also strongly infected Pl. xylostella with LT50 values of 2.52~6.59 days. For sporulation, brown rice alone or brown rice mixed with rice husks and wheat bran or rice bran was suitable for cultivating these isolates. Two newly isolated species of Paecilomyces, P. lilacinus and P. javanicus, can be used as biological control agents for controlling Pl. xylostella and S. litura.
... Entomopathogenic fungi are currently considered to be the important factors controlling insect population, and are well suited for being developed as ecofriendly biopesticide (Kumar et al., 2015). Among them, Peacilomyces are important natural control agents and sources of mycopesticides for pests management worldwide (Han et al., 2014;Jamali and Ghasemi, 2016;Sanjaya et al., 2016). To isolate entomopathogenic fungi, susceptible insect host and selective media have been utilizing to the isolation of entomopathogenic fungi from soil. ...
