Impact of imidazolium salts to reduce the infection of Bombyx mori caterpillars by Beauveria bassiana

Impact of imidazolium salts to reduce the infection of Bombyx mori caterpillars by Beauveria bassiana

The silkworm, Bombyx mori L. (Lepidoptera: Bombycidae), is susceptible to several entomopathogens, including the fungus Beauveria bassiana (Bals.‐Criv.) Vuill. (Hypocreales), which causes white muscardine. Aiming at effective alternatives for disease control, the effect of one pyridinium salt (PS) a...

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Bibliographic Details
Published in:Entomologia experimentalis et applicata Vol. 170; no. 10; pp. 869 - 876
Main Authors: Pessini, Graziele Milani, Schrekker, Henri Stephan, Demétrio da Silva, Vinícius, Pares, Rafaela Barbosa, Alves, Luis Francisco Angeli, Ribeiro, Lucinéia de Fátima Chasko, Seixas, Flávio Augusto Vicente, Fernandez, Maria Aparecida
Format: Journal Article
Language:English
Published: Amsterdam Wiley Subscription Services, Inc 01-10-2022
Subjects:
antifungal control
antimicrobial product
Beauveria bassiana
Bombycidae
Bombyx mori
Caterpillars
Chlorides
Conidia
Disease control
entomopathogen
Fungi
Germination
Hypocreales
Infections
ionic liquid
Larvae
Lepidoptera
Pyridinium
Salts
sanity
sericulture
silkworm
Silkworms
Worms
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Summary:The silkworm, Bombyx mori L. (Lepidoptera: Bombycidae), is susceptible to several entomopathogens, including the fungus Beauveria bassiana (Bals.‐Criv.) Vuill. (Hypocreales), which causes white muscardine. Aiming at effective alternatives for disease control, the effect of one pyridinium salt (PS) and seven imidazolium salts (IS) on biological parameters of this fungus – conidia germination, colony‐forming units (CFU), vegetative growth, and conidia production – were evaluated in vitro. Then, the in vivo action of the IS on silkworm larvae and pupae was verified. Preventive and curative actions of selected IS for disease suppression in B. mori caterpillars were evaluated either via oral or integumentary administration. When administered daily via feeding sheets, the IS 1,3‐di‐n‐decyl‐2‐methylimidazolium chloride at 100 μg ml−1 was effective in reducing the mortality of caterpillars by the fungal infection. In addition, it did not show any negative effects on developing B. mori larvae. Therefore, 1,3‐di‐n‐decyl‐2‐methylimidazolium chloride can be an effective tool in the management of white muscardine in silkworm rearing houses. Bombyx mori (Lepidoptera: Bombycidae) is susceptible to the fungus Beauveria bassiana (Hypocreales), which causes white muscardine. The effect of one pyridinium salt and seven imidazolium salts (IS) on biological parameters of this fungus was evaluated in vitro. 1,3‐Di‐n‐decyl‐2‐methylimidazolium chloride at 100 μg ml−1 reduces the caterpillar's mortality by the fungal infection when administered via feed sheets and in daily applications. Therefore, this IS can be an effective tool in the management of white muscardine in silkworm rearing houses.
ISSN:0013-8703
1570-7458
DOI:10.1111/eea.13220