Compatibility of entomopathogenic nematodes with insecticides against the cabbage white butterfly, Pieris rapae L. (Lepidoptera: Pieridae)

Egyptian Journal of Biological Pest Control

Table 3 Efficacy of EPN species at concentrations of 50, 100 and 125 IJs/larva against the 4rd instar Pieris rapae larvae after different time intervals

Treatments	% Mortality of 4th instar Pieris rapae larvae at time intervals post treatments
	One day	Two days	Three days	Four days	Five days
	50 IJs/larva
Steinernema carpocapsae (All strain)	4.00 ab	16.00 ab	48.00 b	68.00 c	92.00 ab
S. feltiae (Filipjev)	0.00 b	12.00 b	40.00 b	60.00 c	84.00 b
Heterorhabditis bacteriophora (HP88)	12.00 a	28.00 a	64.00 a	92.00 a	100.00 a
H.bacteriophora (Ar-4)	8.00 ab	24.00 ab	48.00 b	80.00 b	100.00 a
	100 IJs/larva
S.carpocapsae (All strain)	8.00 b	20.00 b	56.00 bc	76.00 b	100.00 a
S. feltiae (Filipjev)	4.00 b	16.00 b	48.00 c	68.00 b	88.00 b
H.bacteriophora (HP88)	20.00 a	40.00 a	72.00 a	96.00 a	100.00 a
H.bacteriophora (Ar-4)	20.00 a	36.00 a	68.00 ab	92.00 a	100.00 a
	125 IJs/larva
S.carpocapsae (All strain)	16.00 ab	32.00 bc	60.00 b	80.00 b	100.00 a
S. feltiae (Filipjev)	12.00 b	24.00 c	60.00 b	76.00 b	96.00 a
H.bacteriophora (HP88)	24.00 a	48.00 a	84.00 a	100.00 a	100.00 a
H.bacteriophora (Ar-4)	20.00 ab	40.00 ab	76.00 a	96.00 a	100.00 a

Reported numbers represent means of 5 replicates
Different letter(s) in the same column represent significant differences (P ≤ 0.05) according to Tykey`s multiple range test
\({\text{Mortality}}\;\left( \% \right) = \frac{{{\text{Number }}\;{\text{of }}\;{\text{dead }}\;{\text{larvae}}}}{{{\text{Total }}\;{\text{number }}\;{\text{of}}\;{\text{ larvae}}}} \times {100}\)