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Table 4 Mortality of S. exigua larvae by P. ribesioides extract spray applications after 24 h exposure under greenhouse conditions at FI50 concentrations

From: Antifeedant Activity and Biochemical Responses in Spodoptera exigua Hübner (Lepidoptera: Noctuidae) Infesting Broccoli, Brassica oleracea var. alboglabra exposed to Piper ribesioides Wall Extracts and Allelochemicals

Treatments

Mortality (%) ± SE

1st applicationB

2nd applicationC

Dichloromethane extractA

 > 100 µg/cm2

 > 100 µg/cm2

Hexane extract

46.67 ± 5.77bc

56.67 ± 5.77bc

Ethyl acetate extract

63.33 ± 5.77c

73.33 ± 5.77cd

Methanol extract

30.00 ± 10.00b

36.67 ± 11.55b

CypermethrinD

83.33 ± 5.77d

93.33 ± 11.55d

Control

9.33 ± 1.15a

13.33 ± 3.06a

P-value

 < 0.0001

 < 0.0001

F-value

61.35

42.46

  1. ADichloromethane extract FI50 values > 100 µg/cm2 were not determined for greenhouse experiments
  2. B1st application means 29 days of Brassica oleracea var alboglabra planting and mean values within a column followed by same letter were not significantly different (P < 0.05) by Tukey’s test
  3. C2nd application means 36 days of Brassica oleracea var alboglabra planting and mean values within a column followed by same letter were not significantly different (P < 0.05) by Tukey’s test
  4. DPositive control