Host age influence on the parasitism of the species Cotesia vestalis (Haliday) (Hymenoptera: Braconidae)

Egyptian Journal of Biological Pest Control

Table 1 Preference of C. vestalis for different larval stages of P. xylostella

Host instar	Mean (± SE) number of larvae parasitized out of five larvae of each instar	CV (%)	Parasitization (%)
I	0.4 ± 0.2^c	136.9	8
II	4.2 ± 0.2^a	10.6	84
III	2.6 ± 0.2^b	21.1	52
IV	1.0 ± 0.3^c	70.7	20
CD (p = 0.05)	0.7

Values superscripted by the same letter in the column do not differ significantly at p ≤ 0.05