Assessment of a diketopiperazine, cyclo(Trp-Phe) from Streptomyces griseoplanus SAI-25 against cotton bollworm, Helicoverpa armigera (Lepidoptera: Noctuidae)

Abstract

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Extracellular biosynthesis of silver nanoparticles using Streptomyces griseoplanus SAI-25 and its antifungal activity against Macrophomina phaseolina , the charcoal rot pathogen of sorghum

“…It was previously characterized and proved for its insecticidal activity against lepidopteran insects such as Helicoverpa armigera, Spodoptera litura and Chilo partellus (Vijayabharathi et al, 2014). An insecticidal metabolite belongs to diketopiperazine class called cyclo(Trp-Phe) has also been identified (Sathya et al, 2016) from S. griseoplanus SAI-25. Therefore, the aim of the present study is to synthesize and characterize AgNPs from SAI-25, and to evaluate its antifungal activity against the charcoal rot pathogen.…”

Insecticidal activities of diketopiperazines of Nomuraea rileyi entomopathogenic fungus

“…Recent studies revealed that Cycle (Trp-Phe) exhibited dose-dependent anti-alimentary, larvicidal and pupicidal activity against H. armigera. In addition, the purified compound prolonged the larval and pupal period when compared to the untreated control (Sathya et al, 2016).…”

Management of Fungal Diseases of Chickpea (Cicer arietinum L.) through Plant Growth Promoting Actinobacteria and Their Secondary Metabolites

“…Secondary metabolites from Streptomyces are reported to control Helicoverpa armigera, one of the important polyphagous insect pests of many legume crops including chickpea, causing yield losses of up to 100% (Vijayabharathi et al 2014). An insecticidal compound, diketopiperazine, cyclo (Trp-Phe), was purified from the extracellular extract of Streptomyces griseoplanus SAI-25 against H. armigera of chickpea (Sathya et al 2016). One more metabolite was also purified from the culture filtrate of Streptomyces sp.…”