Antifeedant, contact toxicity and oviposition deterrent effects of phyllostine acetate and phyllostine isolated from the endophytic fungus <i>Diaporthe miriciae</i> against <i>Plutella xylostella</i> larvae

Ratnaweera, Pamoda B.; Jayasundara, J M Nisansala M; Herath, H H M Suseema D; Williams, David E.; Rajapaksha, Sasini U; Nishantha, K. M. D. W. P.; Silva, E.Dilip de; Andersen, Raymond J.

doi:10.1002/ps.5673

Cited by 16 publications

(11 citation statements)

References 32 publications

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“…Previous studies have confirmed that some species of the Aspergillus genus contribute to the death of members of the insect orders Hymenoptera [ 74 ], Lepidoptera [ 75 ], Coleoptera [ 76 ] and Diptera [ 77 ]. Furthermore, some species of the Diaporthe genus are pathogens of dipteran [ 78 ] and lepidopteran species [ 20 , 79 ] and can result in the death of insects [ 61 ]. However, there is no firm evidence indicating that Botryosphaeria sp., Aspergillus sp.…”

Section: Discussionmentioning

confidence: 99%

The Diversity and Dynamics of Fungi in Dryocosmus kuriphilus Community

Yang

Zhu

et al. 2021

Insects

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Dryocosmus kuriphilus (Hymenoptera: Cynipidae) is a gall wasp that induces insect galls on chestnut trees and results in massive yield losses worldwide. Fungi can cause the necrosis of chestnut trees and the death of gall wasps. The aim of this research was to investigate the potential role of D. kuriphilus in the transmission of fungi. We sequenced the ribosomal RNA internal transcribed spacer region 1 of fungi in D. kuriphilus adults, associated insect galls and the galled twigs of Castanea mollissima, using high-throughput sequencing. We compared the species richness, α-diversity and community structure of fungi in D. kuriphilus adults, insect galls and the galled twigs. We provide the first evidence that D. kuriphilus adults shared most fungal species with associated insect galls and the galled twigs, and were dominated by Botryosphaeria sp., Aspergillus sp. and Diaporthe sp. We suggest D. kuriphilus adults may be potential vectors of plant pathogens and may facilitate the transmission of fungi between chestnut trees. Furthermore, the fungi may horizontally transmit among D. kuriphilus adults, associated insect galls and the galled twigs.

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Section: Discussionmentioning

confidence: 99%

The Diversity and Dynamics of Fungi in Dryocosmus kuriphilus Community

Yang

Zhu

et al. 2021

Insects

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“…Currently, 106 compounds derived from Diaporthe exhibiting biological activities, such as cytotoxic, antifungal, antibacterial, antiviral, antioxidant, anti-inflammatory, phytotoxic, antiparasitic, and herbicidic activities, have been studied (Ash et al, 2010;Meepagala et al, 2018;Xu et al, 2021). Two cyclohexeneoxidediones, phyllostine acetate (1) and phyllostine (2), from the fungus Diaporthe miriciae, showed insecticidal activity against Plutella xylostella larvae (Ratnaweera et al, 2020). Meepagala et al (2018) isolated a compound from the liquid medium extract of Diaporthe eres, identified as 3,4-dihydro-8-hydroxy-3,5-dimethylisocoumarin (1), which has larvicidal activity against Ae.…”

Section: Discussionmentioning

confidence: 99%

Extracts of Amazonian Fungi With Larvicidal Activities Against Aedes aegypti

et al. 2021

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The global increase in diseases transmitted by the vector Aedes aegypti, new and re-emerging, underscores the need for alternative and more effective methods of controlling mosquitoes. Our aim was to identify fungal strains from the Amazon rain forest that produce metabolites with larvicidal activity against Aedes aegypti. Thirty-six fungal strains belonging to 23 different genera of fungi, isolated from water samples collected in the state of Amazonas, Brazil were cultivated. The liquid medium was separated from the mycelium by filtration. Medium fractions were extracted with ethyl acetate and isopropanol 9:1 volume:volume, and the mycelia with ethyl acetate and methanol 1:1. The extracts were vacuum dried and the larvicidal activity was evaluated in selective bioassays containing 500 μg/ml of the dried fungal extracts. Larval mortality was evaluated up to 72 h. None of the mycelium extracts showed larvicidal activity greater than 50% at 72 h. In contrast, 15 culture medium extracts had larvicidal activity equal to or greater than 50% and eight killed more than 90% of the larvae within 72 h. These eight extracts from fungi belonging to seven different genera (Aspergillus, Cladosporium, Trichoderma, Diaporthe, Albifimbria, Emmia, and Sarocladium) were selected for the determination of LC50 and LC90. Albifimbria lateralis (1160) medium extracts presented the lowest LC50 value (0.268 μg/ml) after 24 h exposure. Diaporthe ueckerae (1203) medium extracts presented the lowest value of LC90 (2.928 μg/ml) at 24 h, the lowest values of LC50 (0.108 μg/ml) and LC90 (0.894 μg/ml) at 48 h and also at 72 h (LC50 = 0.062 μg/ml and LC90 = 0.476 μg/ml). Extracts from Al. lateralis (1160) and D. ueckerae (1203) showed potential for developing new, naturally derived products, to be applied in integrated vector management programs against Ae. aegypti.

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“…200-202 °C. 1 Compounds I-11−I-46 were synthesized by means of the procedure described for I-10. The physical data for I-11-I-46 are provided in the Supporting Information.…”

Section: 5-dichloro-1-(1-trifluoromethylethenyl)benzenementioning

confidence: 99%

Design, synthesis, and insecticidal and fungicidal activities of quaternary ammonium salt derivatives of a triazolyphenyl isoxazoline insecticide

Huang

Zhu

Wang

et al. 2022

Pest Management Science

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BACKGROUND Insect pests seriously decrease the yield and quality of agricultural crops. Resistance to commonly used insecticides is increasingly undermining their effectiveness, and therefore the development of agents with novel modes of action is desirable. Isoxazolines are a new class of insecticides that act on γ‐aminobutyric acid (GABA) gated chloride channels. In this work, we used the highly active 4‐triazolyphenyl isoxazoline DP‐9 as a parent structure to design and synthesize a series of quaternary ammonium salt (QAS) derivatives, and we systematically evaluated their insecticidal and antifungal activities. RESULTS Many of the synthesized QASs exhibit insecticidal activities equivalent to or higher than that of DP‐9. In particular, compounds I‐31 (93%, 0.00005 mg/L) and I‐34 (80%, 0.00001 mg/L) showed insecticidal activities against diamondback moth larvae that were 2–10 times higher than those of fluralaner (70%, 0.0001 mg/L) and DP‐9 (80%, 0.0001 mg/L), in addition to showing excellent activities against oriental armyworm, fall armyworm, cotton bollworm, corn borer, and mosquito larvae. Furthermore, all of the synthesized compounds also showed broad‐spectrum fungicidal activities. CONCLUSION The insecticidal activities of QAS derivatives of DP‐9 were the same as or better than the activity of DP‐9. Compounds I‐31 and I‐34 showed better insecticidal activities against diamondback moth larvae than fluralaner and DP‐9, and thus are promising new candidates for insecticide research.

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Antifeedant, contact toxicity and oviposition deterrent effects of phyllostine acetate and phyllostine isolated from the endophytic fungus Diaporthe miriciae against Plutella xylostella larvae

Cited by 16 publications

References 32 publications

The Diversity and Dynamics of Fungi in Dryocosmus kuriphilus Community

The Diversity and Dynamics of Fungi in Dryocosmus kuriphilus Community

Extracts of Amazonian Fungi With Larvicidal Activities Against Aedes aegypti

Design, synthesis, and insecticidal and fungicidal activities of quaternary ammonium salt derivatives of a triazolyphenyl isoxazoline insecticide

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