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Table 3 Progeny production of Sitophilus zeamais on grains of three maize varieties treated with NeemPro® under ambient laboratory conditions

From: Use of NeemPro®, a neem product to control maize weevil Sitophilus zeamais (Motsch.) (Coleoptera: Curculionidae) on three maize varieties in Cameroon

Maize variety/content (g/kg) Mean number of F1 adult progeny % reduction in adult emergence relative to control
CLH103
 Malagrain 0 ± 0b 100 ± 0a
 0 85.75 ± 17.31a 0 ± 0c
 0.75 14.25 ± 3.82b 84.25 ± 3.52b
 1.5 4.5 ± 1.66b 93.95 ± 2.57ab
 3 2.25 ± 0.75b 96.75 ± 1.51a
 6 1.25 ± 1.25b 98.48 ± 1.52a
 F-value 20.56*** 375.89***
CMS8501
 Malagrain 0 ± 0d 100 ± 0a
 0 125.25 ± 4.59a 0 ± 0c
 0.75 38.25 ± 10.84b 68.58 ± 9.65b
 1.5 17.75 ± 4.44bc 85.58 ± 4.03ab
 3 6.25 ± 2.75 cd 94.83 ± 2.35ab
 6 2.75 ± 1.8d 97.7 ± 1.5a
 F-value 75.92*** 69.62***
SHABA
 Malagrain 0 ± 0c 100 ± 0a
 0 79.25 ± 4.94a 0 ± 0c
 0.75 44.75 ± 8.17ab 42.33 ± 11.99b
 1.5 32 ± 7.87bc 58.28 ± 1.28ab
 3 20.75 ± 8.25bc 72.5 ± 11.21ab
 6 9.75 ± 4.23c 87.03 ± 5.67a
 F value 15.04*** 13.07***
  1. Means in the same column for the same maize variety, followed by the same letter do not differ significantly at P = 0.05 (Tukey’s test); Number of replicates: 4; *** P < 0.001; F value: a ratio of two variances—the “between group” variance and the “within-group” variance