Effects of stilbene optical brighteners on the insecticidal activity of Bacillus thuringiensis and a single nucleopolyhedrovirus on Helicoverpa armigera

Ibargutxi, María A.; Muñoz, Delia; Bernal, Alexandra; Escudero, Íñigo Ruiz de; Caballero, Primitivo

doi:10.1016/j.biocontrol.2008.08.019

Cited by 13 publications

(2 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance, Bernal et al (2014) demonstrated that the pathogenicity of NPV against the fourth instar larvae of Chrysodeixis chalcites ranged from 51% to 96% depending on various FBs. Ibargutxi et al (2008) investigated the effects of nine different optical brighteners on the pathogenic activities of Btk and NPV against Helicoverpa armigera and reported that four brighteners were effective but five other brighteners exerted an adverse or no effect on Btk. Moreover, some brighteners that exerted no effect on Btk demonstrated increased pathogenicity when combined with NPV.…”

Section: Discussionmentioning

confidence: 99%

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

Mezione de Carvalho,

Hwang,

Lee

2023

Arch Insect Biochem Physiol

View full text Add to dashboard Cite

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 × 102 IU/mL) increased the mortality, whereas FB 71 and Btk combination at intermediate and high concentrations (1.6 × 103 and 1.6 × 104 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 × 102, 3 × 104, and 3 × 106 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.

show abstract

Section: Discussionmentioning

confidence: 99%

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

Mezione de Carvalho,

Hwang,

Lee

2023

Arch Insect Biochem Physiol

View full text Add to dashboard Cite

show abstract

“…The optical brighteners, especially calcofluor, tinopal, leucophor, and blankophor are both protect baculoviruses from UV and damage to the peritrophic membrane of insects. Thus, these substances are added to the formulations to accelerate baculovirus infection (Ibargutxi et al 2008). In addition, boric acid used as a source of physiological stress in larvae increased the virulence (Bhutia et al 2012).…”

Section: Discussionmentioning

confidence: 99%

An environmentally safe and tolerant microbial insecticide utilizing Helicoverpa armigera single nucleopolyhedrovirus (HearNPV-TR)

Eroğlu

Demirbağ

2022

Egypt J Biol Pest Control

View full text Add to dashboard Cite

Background Baculoviruses are significant biocontrol agents of pests in agriculture; however, ultraviolet light B (UV-B) and high temperature inactivate them in the environment within a short time. Results In this study, formulations of Helicoverpa armigera nucleopolyhedrovirus Turkey isolate (HearNPV-TR) were prepared. Crude virus, the oil-based formulations of the virus, and a commercial H. armigera NPV product were exposed to UV-B light and various temperatures (28, 35, and 42 °C) at different periods (0, 1, 3, 5 h.). While the UV-B application decreased the virulence of crude virus up to 32% after 5 h. exposure, it decreased the virulence of oil-based formulation by (15%). Similarly, the virulence of the crude virus by 70% at 42 °C, while was reduced by 10% in the formulations at the same temperature. Therefore, 5% oil formulation was enough to keep the virulence of the virus underexposed to UV-B and high temperatures. LC95 values were calculated as 1 × 108 OBs/ml−1 in concentration–response tests, and mortality rates were 90 and 92% in pot assays for commercial product and 5% oil formulation, respectively. Conclusions The results showed that 5% oil formulation of HearNPV-TR was an important biocontrol preparation to protect virus virulence under suppressive environmental conditions.

show abstract

Effect of High Temperature and UV Radiation on the Insecticidal Capacity of a Spodoptera frugiperda Nucleopolyhedrovirus Microencapsulated in a Matrix Based on Oxidized Corn Starch

et al. 2023

View full text Add to dashboard Cite

Effects of stilbene optical brighteners on the insecticidal activity of Bacillus thuringiensis and a single nucleopolyhedrovirus on Helicoverpa armigera

Cited by 13 publications

References 48 publications

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

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

An environmentally safe and tolerant microbial insecticide utilizing Helicoverpa armigera single nucleopolyhedrovirus (HearNPV-TR)

Effect of High Temperature and UV Radiation on the Insecticidal Capacity of a Spodoptera frugiperda Nucleopolyhedrovirus Microencapsulated in a Matrix Based on Oxidized Corn Starch

Contact Info

Product

Resources

About