Skip to main content

Table 3 Development time and survival of Chrysoperla zastrowi sillemi fed on Amrasca biguttula biguttula reared on Bt and non-Bt cotton cultivars

From: Impact of Bt cotton expressing single (Cry1Ac) and dual toxins (Cry1Ac and Cry2Ab) on the fitness of the predator Chrysoperla zastrowi sillemi (Esben-Petersen): prey-mediated tri-trophic analysis

Parameters

Bollgard (Cry1Ac)

Bollgard II (Cry1Ac and Cry2Ab)

Non-Bt

Statistical analysis

*Larval period (days)

14.48 ± 0.21 (23)

14.45 ± 0.29 (22)

14.43 ± 0.26 (23)

F = 0.01; df = 2.65; P = 0.993

#Larval survival (%)

76.7

73.3

76.7

χ2 = 0.342; df = 2; P = 0.952

*Pupal period (days)

7.68 ± 0.20 (19)

7.63 ± 0.21 (19)

7.58 ± 0.18 (19)

F = 0.07; df = 2.54; P = 0.930

#Pupal survival (%)

82.6

86.4

82.6

χ2 = 0.375; df = 2; P = 0.945

*Larval weight (mg)

10.05 ± 0.35 (20)

10.00 ± 0.37 (20)

10.11 ± 0.32 (20)

F = 0.02; df = 2.57; P = 0.979

*Cocoon weight (mg)

12.85 ± 0.63 (19)

13.00 ± 0.54 (19)

13.05 ± 0.68 (19)

F = 0.03; df = 2.54; P = 0.969

  1. Means (± SE), number of replicates given in parentheses, the experiment started with 30 larvae in each treatment; *one-way ANOVA (p < 0.05), #chi-square test (p < 0.05)