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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Pyraclostrobin Impairs Energetic Mitochondrial Metabolism and Productive Performance of Silkworm (Lepidoptera: Bombycidae) Caterpillars

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Author(s):
Nicodemo, Daniel [1] ; Mingatto, Fabio Erminio [1] ; de Carvalho, Amanda [1] ; Veiga Bizerra, Paulo Francisco [1] ; Tavares, Marco Aurelio [1] ; Boas Balieira, Kamila Vilas [1] ; Bellini, William Cesar [1]
Total Authors: 7
Affiliation:
[1] Sao Paulo State Univ Unesp, Coll Technol & Agr Sci, Dracena, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Journal of Economic Entomology; v. 111, n. 3, p. 1369-1375, JUN 2018.
Web of Science Citations: 3
Abstract

Silkworm cocoon production has been reduced due to a number of problems other than those inherent in sericulture, such as diseases, malnutrition, and inappropriate management. The use of pesticides in areas surrounding mulberry fields can contaminate these plants and consequently harm caterpillars. The aim of this study was to evaluate whether the application of the fungicide pyraclostrobin in mulberry plants interferes with the mitochondrial bioenergetics and the productive performance of silkworms. Mulberry plants were treated with pyraclostrobin (0, 100, 200, and 300 g ha(-1)). After 30 d of fungicide application, fifth instar caterpillars were fed with leaves from the treated plants. We evaluated in vitro and in vivo mitochondrial bioenergetics of mitochondria from the head and intestines, as well as the feed intake and mortality rate of the caterpillars and the weight of fresh cocoons and cocoons shells. At doses of 50 mu M (in vitro) and 200 g ha(-1) (in vivo), pyraclostrobin inhibited oxygen consumption in state 3, dissipated membrane potential, and inhibited ATP synthesis in mitochondria. Pyraclostrobin acted as a respiratory chain inhibitor, affecting mitochondrial bioenergetics.The fungicide did not interfere with food consumption but negatively affected mortality rate and weight of cocoons. Mulberry leaves contaminated with pyraclostrobin negatively impact the mitochondrial bioenergetics of silkworms and cocoon production. (AU)

FAPESP's process: 14/25673-0 - Use of strobilurin in mulberry crop to improve silkworm coccon production
Grantee:Daniel Nicodemo
Support type: Regular Research Grants