Salicylic acid: resistance inducer to two-spotted spider mite in strawberry crop

Abstract

The strawberry is susceptible to several pests which cause a reduction in productivity. The use of mechanisms which repel or prevent these pests to establish, represent a sustainable environmental technology to reduce the frequency of agrochemical use. In this context, the aim of this study was to evaluate the effect of salicylic acid (SA) on resistance induction against two-spotted spider mite in strawberry cultivars (Aromas and Sweet Charlie). Five concentrations of SA (0, 25, 50, 75 and 100 mg L-1) were tested in order to verify the antixenosis effects. In SA concentration of 50 mg L-1, a reduced number of mites in the two strawberry cultivars was noticed. For the number of eggs deposited on leaflet, we verified an effect of SA concentration with quadratic adjustment in the equation. Sweet Charlie cultivar was more effective than Aromas in relation to the reduction of mite oviposition on leaflets treated with SA. SA concentrations of 25, 50 and 75 mg L-1 were the most efficient for the evaluated traits allowed to infer its potential as antixenotic resistance inducer against two-spotted spider mite in strawberry crop.

Induction of resistance againstBrevicoryne brassicaebyPseudomonas putidaand salicylic acid in canola

“…Furthermore, Favaro et al . (2019) verified the antixenosis resistance in strawberry cultivars treated with SA against the two-spotted spider mite. This effect can be due to SAR that results from invader recognition accompanied by the induction of the synthesis of particular materials, such as chitinases and other hydrolytic enzymes, because of the elicitor action as an endogenous signal for triggering the plant defense response (Mandal et al ., 2008).…”

The Ecology of Salicylic Acid Signaling: Primary, Secondary and Tertiary Effects with Applications in Agriculture

“…SA not only affects larval performance of P. brassicae in Arabidopsis , but also potentially affects oviposition behavior; MeSA tends to deter oviposition by P. brassicae when either dispensed exogenously or expressed constitutively at high levels [97]. Similar effects on oviposition and performance were observed to some extent in other systems, but either been tested solely through exogenous application or not explored to the same extent [98,99].…”

Relationship between salicylic acid and resistance to mite in strawberry

“…For the test, juvenile strawberry ('Sweet Charlie') plants obtained from the nursery were grown in pots (3 dm 3 per 40 days) containing a mixture of soil and commercial bio-stabilised substrate, obtained by anaerobic digestion in a reactor and fertilised with 3.8 g NPK formula 4-14-8 (NPK) in an automated greenhouse (T 25 ± 3 o C, RH 80 ± 5%, and photoperiod 13:11 h, light:dark). For each treatment, eight plants were taken and divided into four replications with two plants per pot, based on the preliminary research carried out by Favaro et al (2019).…”

“…Exogenous SA has been reported to induce resistance to the striped mite in strawberry cultivars, reducing adult survival and oviposition (Favaro et al, 2019). However, the mechanisms related to these resistance effects are not yet fully understood, especially regarding the morpho-agronomic changes that occur in plants attacked by the pest.…”