Effects of Methanolic Extracts of Annona Species on the Development and Reproduction of Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)

Abstract

Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) causes significant losses in corn crops and necessitates the use of alternative control strategies, such as the application of bioinsecticides. We report the effect of methanolic leaf extracts of Annona dioica, Annona cacans, and Annona coriacea on the development and reproduction of S. frugiperda. A quantitative analysis was carried out to determine the total concentration of phenolics, flavonoids, and condensed tannin (CT) in leaf extracts. Corn leaves were immersed in a 1% methanolic leaf extract solution and fed to second instars of S. frugiperda. Leaf disks dipped in the synthetic insecticide Connect® (Bayer CropScience Ltda) composed of a neonicotinoid (imidacloprid) and a pyrethroid (β-cyfluthrin), which are harmful to S. frugiperda, was used as positive control. Distilled water was used as a negative control treatment. The leaf extract of A. coriacea decreased larval survivorship, arrested pupal development, and affected the weight gain of S. frugiperda. A. dioica also affected larval survivorship, but its effects were more pronounced for the adult stage, as fecundity, fertility, egg hatchability, and embryonic development were severely affected. Leaf extracts from A. cacans had no effect on S. frugiperda. The leaf extracts of A. dioica and A. coriacea showed a higher content of flavonoids and phenols, respectively. Our results indicated that both A. dioica and A. coriacea have the potential for development as botanical insecticides.

Biological Activity of Piper aduncum extracts on Anticarsia gemmatalis (Hübner) (Lepidoptera: Erebidae) and Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)

“…Phenylpropanoids are toxic to insects and may affect the life cycle of insects (Regnault-Roger et al 2012, Kim andLee 2014). Studies using leaf extracts from A. coriacea and A. dioica, with high content of phenolic compounds, found decreased weight gain, adult emergence, fecundity, fertility, and egg hatching of S. frugiperda (Freitas et al 2014).…”

Bioactivity of the organic extracts of Cnidoscolus urens (L.) Arthur (Euphorbiaceae) on the cabbage-caterpillar

“…Means followed by the same letter, in the columns, do not differ by Scott-Knott's test, with the probability at 5%. authors (Alves et al, 2012;Freitas et al, 2014 andand Magrini et al, 2015) ( 1) The data were transformed as √ (x + 1.0) to suit the statistical analyses. Means followed by the same letter in the columns do not differ from each other by the Scott-Knott test at 5% probability.…”

Feeding preference of Plutella xylostella for leaves treated with plant extracts

“…With regard to the order Lepidoptera, a recent study by Freitas et al (2014) showed the control of S. frugiperda using plant extracts by reducing the viability of the larval phase. Extracts of A. coriacea added to the diet of Anagasta kuehniella caused death in 50% of the larvae, and acted as an antifeedant (Coelho et al 2007).…”