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Table 4 Population increase (mean number of progeny for 4 jars ± SE) and damage parameters of Sitophilus zeamais on grains of three maize varieties admixed with NeemPro® and stored for 4 months under laboratory conditions and percentage of seed germination

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) Number of insects alive Grain damage (%) Weight loss (%) Germination (%)
CLH103
 Malagrain 0 ± 0b 0 ± 0b 0 ± 0b 84.13 ± 1.24a
 0 669 ± 0a 113 ± 0a 99.99 ± 0.01a 0 ± 0b
 0.75 5 ± 5b 1 ± 1b 0.13 ± 0.13b 85.56 ± 2.94a
 1.5 0 ± 0b 0 ± 0b 0 ± 0b 86.67 ± 1.93a
 3 0 ± 0b 0 ± 0b 0 ± 0b 76.67 ± 1.93a
 6 0 ± 0b 0 ± 0b 0 ± 0b 82.22 ± 2.94a
 F value 86.63*** 8607.81*** 999.99*** 218.06***
CMS8501
 Malagrain 0 ± 0c 0 ± 0c 0 ± 0b 86.41 ± 1.02ab
 0 748 ± 28a 106 ± 0a 99.94 ± 0.01a 0 ± 0c
 0.75 40 ± 20b 5 ± 2b 1.13 ± 0.44b 85.55 ± 2.22ab
 1.5 6 ± 6bc 1 ± 1bc 0.61 ± 0.61b 82.22 ± 2.94ab
 3 0 ± 0c 0 ± 0c 0 ± 0b 78.89 ± 5.56ab
 6 0 ± 0c 0 ± 0c 0 ± 0b 72.22 ± 294b
 F value 86.63*** 970.42*** 17674.85*** 110.92***
SHABA  
 Malagrain 0 ± 0d 0 ± 0b 0 ± 0b 57.73 ± 2.05c
 0 762 ± 66a 98 ± 0a 99.98 ± 0.01a 0 ± 0b
 0.75 476 ± 60a 81 ± 12a 58.31 ± 24.36a 26.67 ± 13.47ab
 1.5 135 ± 48b 28 ± 5b 5.85 ± 1.12b 37.78 ± 2.94a
 3 54 ± 21bc 12 ± 2b 1.54 ± 0b 33.33 ± 1.93a
 6 15 ± 11c 7 ± 3b 0.69 ± 0.29b 30 ± 3.33a
 F value 47.11*** 44.29*** 16.5*** 6.27***
  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