Feeding preference of Plutella xylostella for leaves treated with plant extracts

Abstract

Plutella xylostella L. is one of the main agents to cause damages to plants of Brassica genus, provoking negative impacts in cultures. The use of botanical extracts in plants protection has been related in literature, however, their use in the species analyzed in this study is not yet reported. We assessed the effect of aqueous and methanolic extracts of the species: Schinus terebinthifolius Raddi ( -branco), occuring in the state of Mato Grosso do Sul and whose feeding preference of P. xylostella larvae of 3rd instar. We intend to answer the following questions: (1) Are the plant species analyzed fagodeterrentes? (2) what type of extract produces the least food preferrence? To answer these questions, we treated cabbage disks with aqueous extracts stored in a refrigerator in periods of 0, 7, 14 and 21 days and the methanolic extracts were treated at concentrations of 0.5 mg/mL, 1.0 mg/ mL, 2.0mg/mL. The aqueous and methanolic extracts of T. silvatica presented the lowest values of feeding preference, 0.113 and 0.06, respectively, compared to other extracts.

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

“…Aqueous extracts of C. adamantium, C. guazumifolia and C. xanthocarpa were prepared by maceration from leaves that were collected, dried in a forced circulation oven for 3 days at a maximum temperature of 40 °C (±1 °C) and then ground in a mill to obtain fine powder. n the present st shows the effe nd mean numb on (Amoabeng ul, 2012), and insects from plants, such as feeding inhibitors (Couto et al, 2016;Koul, 2005Koul, , 2008. In this line of study the genus Campomanesia interfered in the biological characteristics of P. xylostella.…”

“…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).…”

Involvement of Nrf2 in Ocular Diseases

“…In oxidative stress environments, GSH can conjugate proteins, causing the formation of glutathionylated proteins (PSSG). High PSSG accumulation is often indicative of a deviant redox state and can cause cell damage and death [95, 96]. Hence, chemicals and drugs capable of enhancing GSH levels and restoring redox balance are of key importance to preventing and reducing RPE oxidative injury.…”

Botanical Extracts of the Brazilian Savannah Affect Feeding and Oviposition of Plutella xylostella (Linnaeus, 1758) (Lepidoptera: Plutellidae)

“…A study by Couto et al (2016) evaluating the aqueous and methanolic extracts of the leaves of Annona coriacea Mart. and Schinus terebinthifolius Raddi.showed that these plants negatively affected the feeding of P. xylostella, reducing the leaf consumption of third instar larvae (caterpillars).…”

“…There are several plant families with the potential to be used for insect control (Camaroti et al, 2018), such as, Annonaceae (Ribeiro et al, 2018), Sapindaceae (Castillo et al, 2009), Meliaceae (Sapindal et al, 2017) and Rubiaceae (Peres et al, 2017). Highlighted among the substances useful for insect control are those with insecticidal action (Amoabeng et al, 2014), oviposition inhibitors (Torres et al, 2006), growth regulators (Koul, 2012), repellents (Koul, 2008), or those that only distance insects from the plants such as feeding inhibitors (Couto et al, 2016;Koul, 2005Koul, , 2008.…”