Insecticidal activity of Muntingia calabura extracts against larvae and pupae of diamondback, Plutella xylostella (Lepidoptera, Plutellidae)

Abstract

The aim of the present study was to evaluate the insecticidal effects of hexane and ethanolic extracts of the flowers and fruits of Muntingia calabura against diamondback moth, Plutella xylostella. The leaf disc immersion methodology was carried out to assess the insecticidal effects on the larvae and pupae as well as duration of the larval phase following feeding of the first instar larvae of diamondback on the treated leaf discs for 72 h. All extracts were toxic to larvae and pupae of P. xylostella. The ethanolic extracts of the flowers and fruits of M. calabura were the most toxic against first instar P. xylostella larvae with LC 50 values of 0.61 lg mL À1 and 1.63 lg mL À1 respectively, followed by the hexane extract of the fruits (LC 50 = 5.5 lg mL À1 ) and flowers (LC 50 = 18.9 lg mL À1 ). All extracts were more toxic to P. xylostella larvae compared with cordycepin, the positive control which produced 100% mortality at 500 lg mL À1 in 72 h. Fruit extracts were more active than the flowers in producing pupal mortality following 72 h of feeding of the first instar larvae on leaf discs treated with the extracts. Both the hexane and the ethanolic extracts of M. calabura fruits and flowers prolonged larval duration by $2 days in some cases as compared with the control (7.2 days). These results suggest that M. calabura has potential for development as commercial insecticide for controlling P. xylostella due to its insecticidal effects.

Determination of antioxidant activity and phenolic compounds of Muntingia calabura Linn. peel by HPLC‐DAD and UPLC‐ESI‐MS/MS

“…grows naturally in Central America and was introduced to Brazil as a decorative tree (Bandeira et al, 2013). grows naturally in Central America and was introduced to Brazil as a decorative tree (Bandeira et al, 2013).…”

“…Muntingia calabura Linn. grows naturally in Central America and was introduced to Brazil as a decorative tree (Bandeira et al, 2013). Currently, this plant is well adapted in Brazil due to the favourable weather conditions and soil properties (Lopes et al, 2002;Figueiredo et al, 2008).…”

Insecticidal activity of the ethanolic extract from Croton species against Plutella xylostella L. (Lepidoptera: Plutellidae)

“…As part of a systematic study on the insecticidal potential of the medicinal flora growing in the state of Pernambuco (Bandeira et al, 2013;Pereira et al, 2009), the objective of this work was to evaluate the potential of ethanolic extracts prepared from the stems and leaves of C. rhamnifolius, C. jacobinensis, C. sellowii and C. micans. on the development and survival of P. xylostella.…”

Aqueous Extracts of Species of the Genus Campomanesia (Myrtaceae) Affect Biological Characteristics of Plutella xylostella (Linnaeus, 1758) (Lepidoptera: Plutellidae)

“…Studies involving plant extracts with medicinal properties have reported insecticidal properties such as mortality (Bandeira et al, 2013;Mishra & Singh, 2014;Peres et al, 2017) and feeding deterrence (Chandrashekharaiah et al, 2015;Couto et al, 2016); Deformities in adults, pupae and larvae of Plutella xylostella (Peres et al, 2017).…”