Antioviposition and Reduction of Callosobruchus chinensis Pic. 1902 (Coleoptera: Bruchidae) Emergence on Phaseolus vulgaris by Dioscorea sansibarensis Powder and Its Chemical Composition

Table 2

Oviposition by Callosobruchus chinensis cultured on Phaseolus vulgaris seeds treated with powders of Dioscorea sansibarensis leaves, bulbils, and yams.

Oviposition ± SE
Powder	(Conc. g/50 g)				Positive control	Negative control
	0.2	0.4	0.6	0.8
Leaves	422.5 ± 56.8^c	441.0 ± 51.6^b	360.5 ± 39.8^c	299.8 ± 31.2^c,d	144.3 ± 15	661.5 ± 67.8
Bulbils	491.8 ± 59.7^a	478.8 ± 54.4^a	399.8 ± 46.9^c	385.5 ± 37.9^c
Yams	458.5 ± 65.6^b	405.0 ± 36.3^c	338.8 ± 31.6^c,d	286.0 ± 40.8^d

Treatment with Poisson distributed data was subjected to a generalized linear model. Means in the table that do not share a letter are significantly different (N = 56; ).