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Table 1 Percentages of parasitism of T. bactrae on S. littoralis egg masses with different physical characteristics in a no-choice and choice tests

From: Efficacy of the parasitoid, Trichogrammatoidea bactrae Nagaraja (Hymenoptera: Trichogrammatidae) on the cotton leafworm, Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae) egg masses

Egg masses No-choice Choice
Parasitism% Overall average Parasitism% Overall average
One layer with no scales 70.73 ± 1.84 Ab (50–96.82) 66.67± 2.22a 71.76 ± 2.86 Aa (57.14–100) 60.53 ± 2.49a
One layer with low scale density 77.08 ± 1.62 Aa (60–100) 70.85 ± 2.61 Ba (53.33–88.37)
One layer with mid scale density 71.10 ± 2.46 Ab (36–87.04) 54.38 ± 2.12 Bc (33.33–78.20)
One layer with high scale density 47.71 ± 2.97 Ae (15–69) 45.12 ± 2.37 Ad (30–58.62)
Two layers with low scale density 64.50 ± 1.97 Ac (48.19–81.03) 58.23± 2.06b 61.81 ± 1.03 Ab (55–68.54) 48.53 ± 1.31b
Two layers with mid scale density 56.03 ± 2.35 Ad (36.58–82.83) 48.81 ± 2.64 Bcd (28.95–58.67)
Two layers with high scale density 54.17 ± 1.86 Ade (38.09–71.95) 35.00 ± 0.28 Be (32-36.67)
Three layers with low scale density 38.84 ± 2.69 Af (30–54.61) 29.03±3.11c 25.63 ± 0.08 Bf (25–26.65) 22.67 ± 2.29c
Three layers with high scale density 19.23 ± 3.52 Ag (8–36) 19.72 ± 3.13 Af (5–36.57)
  1. Means ± SE sharing the same small letters in the same columns and same capital letters in the rows are statistically insignificant
  2. P > 0.05. Numbers in parentheses represent the range