Table 2 Relative susceptibility of key lepidopteran pests (i.e., S. frugiperda and A. gemmatalis) to the essential oil of S. guianensis and the synthetic insecticide indoxacarb (oxadiazine).

From: Essential oil of Siparuna guianensis as an alternative tool for improved lepidopteran control and resistance management practices

Insecticide type

Lepidopteran strain

N

Slope ± SEM

LC50 (95% FI) (µL/mL)

TR50* (95% CL)

χ2

P

Essential oil of

S. guianensis

S. frugiperda

(Cry1A.105 and Cry2Ab susceptible strain)

600

4.33 ± 0.61

8.09

(7.59–9.87)

3.3

(3.1–4.0)

0.49

0.97

S. frugiperda

(Cry1A.105 and Cry2Ab resistant strain)

600

1.67 ± 0.13

7.11

(6.94–7.28)

2.9

(2.5–3.1)

1.26

0.73

A. gemmatalis

590

1.75 ± 0.18

2.45

(2.10–2.97)

1.0

(0.9–1.2)

2.90

0.57

Indoxacarb

(oxadiazine)

S. frugiperda

(Cry1A.105 and Cry2Ab susceptible strain)

570

1.93 ± 0.21

0.003

(0.002–0.006)

0.04

(0.02–0.08)

0.44

0.70

S. frugiperda

(Cry1A.105 and Cry2Ab resistant strain)

600

2.19 ± 0.21

0.005

(0.003–0.007)

0.06

(0.05–0.07)

6.2

0.82

A. gemmatalis

540

1.60 ± 0.18

0.08

(0.06–0.10)

1.0

(0.8–1.1)

4.66

0.19

  1. *Tolerance ratio estimated by dividing the LC50 value obtained for S. frugiperda strains by the LC50 value obtained for A. gemmatalis strain.
Back to article page