Effect of fluorescent brighteners on the insecticidal activity of Bacillus thuringiensis var. kurstaki and LdMNPV on Lymantria dispar asiatica in Korea.

Autor: Mezione de Carvalho L; Department of Applied Biology, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Republic of Korea., Hwang HS; Department of Applied Biology, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Republic of Korea.; Sustainable Agriculture Research Center, Kyungpook National University, Gunwi, Republic of Korea., Lee KY; Department of Applied Biology, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Republic of Korea.; Sustainable Agriculture Research Center, Kyungpook National University, Gunwi, Republic of Korea.; Department of Plant Medicine, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Republic of Korea.; Institute of Plant Medicine, Kyungpook National University, Daegu, Republic of Korea.
Jazyk: angličtina
Zdroj: Archives of insect biochemistry and physiology [Arch Insect Biochem Physiol] 2024 Jan; Vol. 115 (1), pp. e22066. Date of Electronic Publication: 2023 Nov 27.
DOI: 10.1002/arch.22066
Abstrakt: Stilbene-based fluorescent brighteners (FBs) have been demonstrated to improve the insecticidal activities of entomopathogenic viruses; however, there is limited information regarding their effect on entomopathogenic bacteria. We conducted this study to investigate the effect of two FBs (FB 28 and FB 71) on the insecticidal activities of Bacillus thuringiensis var. kurstaki (Btk) and Lymantria dispar multiple nuclear polyhedrosis virus (LdMNPV) on Lymantria dispar asiatica. FB 28 and Btk combination at low concentration (1.6 × 10 2  IU/mL) increased the mortality, whereas FB 71 and Btk combination at intermediate and high concentrations (1.6 × 10 3 and 1.6 × 10 4  IU/mL) slightly reduced the mortality compared with that with Btk alone. The lethal time was also shorter with combinations of Btk and FB 28 than with FB 71. Both FB 28 and FB 71 increased the mortality in combination with LdMNPV at all concentrations (3 × 10 2 , 3 × 10 4 , and 3 × 10 6  polyhedral occlusion bodies/mL compared with that with LdMNPV alone. Our results suggest that FBs improve the insecticidal activities of Btk and LdMNPV, and their activities depend on their interactions with the midgut structures of the host insect species.
(© 2023 Wiley Periodicals LLC.)
Databáze: MEDLINE
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