Table 3.

Effect of nematode infestation on survival and reproduction of Brevicoryne brassicae on Brassica nigra plants infested with different species of nematodes (Melodoigyne hapla, Pratylenchus penetrans) or mock infested with water (Control).

Treatment	% Drop	% Dead	Maturation	Reproduction
Control	32	7	10.2 (0.2)	3.50 (0.13)a
M. hapla	32	4	10.0 (0.1)	3.51 (0.13)a
P. penetrans	30	4	10.3 (0.2)	3.08 (0.13)b

n = 20–22 per treatment. % drop = % of aphids that dropped during counting; % dead = % aphids recorded dead on the leaf; Maturation = average number of days from neonate till first reproduction (+SE); Reproduction = average number of offspring per surviving aphid per day after the first day of reproduction (+SE). Letters indicate significant differences between groups (Wilcoxon rank sum test with continuity correction).