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

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

Maize variety/content (g/kg)	Mean number of F₁ adult progeny	% reduction in adult emergence relative to control
CLH103
Malagrain	0 ± 0^b	100 ± 0^a
0	85.75 ± 17.31^a	0 ± 0^c
0.75	14.25 ± 3.82^b	84.25 ± 3.52^b
1.5	4.5 ± 1.66^b	93.95 ± 2.57^ab
3	2.25 ± 0.75^b	96.75 ± 1.51^a
6	1.25 ± 1.25^b	98.48 ± 1.52^a
F-value	20.56***	375.89***
CMS8501
Malagrain	0 ± 0^d	100 ± 0^a
0	125.25 ± 4.59^a	0 ± 0^c
0.75	38.25 ± 10.84^b	68.58 ± 9.65^b
1.5	17.75 ± 4.44^bc	85.58 ± 4.03^ab
3	6.25 ± 2.75 ^cd	94.83 ± 2.35a^b
6	2.75 ± 1.8^d	97.7 ± 1.5^a
F-value	75.92***	69.62***
SHABA
Malagrain	0 ± 0^c	100 ± 0^a
0	79.25 ± 4.94^a	0 ± 0^c
0.75	44.75 ± 8.17^ab	42.33 ± 11.99^b
1.5	32 ± 7.87^bc	58.28 ± 1.28^ab
3	20.75 ± 8.25^bc	72.5 ± 11.21^ab
6	9.75 ± 4.23^c	87.03 ± 5.67^a
F value	15.04***	13.07***

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

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