Bulletin of the National Research Centre

Table 3 Effect of tested formulations on mortality and weight gain of two larval instars of A. ipsilon

From: Field persistence of certain new insecticides and their efficacy against black cutworm, Agrotis ipsilon (Hufnagel)

Conc. (mg L⁻¹)	3rd-instar			5th-instar
	Larval mortality (%) ± SE
	E*	I*	C*	E*	I*	C*
10	30.8^d ± 0.2	26.7^d ± 1.2	22.2 ^d ± 2.3	20.0^d ± 5.2	16.4^e ± 1.9	12.3^d ± 1.9
25	76.7^c ± 2.8	70.0^c ± 1.1	66.5^c ± 1.4	65.5^c ± 1.9	59.9^d ± 1.7	55.5^c ± 1.4
50	93.3^ab ± 0.5	86.9^b ± 0.8	80.8^b ± 0.8	82.3^b ± 1.0	77.7^c ± 1.5	71.9^b ± 1.2
100	100^a ± 0.0	100^a ± 0.0	95.2^ab ± 1.5	97.1^ab ± 0.4	89.8^ab ± 1.0	84.6^ab ± 1.2
200	100^a ± 0.0	100^a ± 0.0	100^a ± 0.0	100 ^a ± 0.0	98.1^a ± 0.4	92.5^a ± 0.6
Mean weight gain (mg/larva) ± SE
Control	357.9^d ± 1.7	355.8^e ± 1.3	360.0^e ± 1.7	710.5^e ± 3.2	714.0^f ± 3.6	712.2^f ± 2.9
10	203.1^c ± 0.2	218.3^d ± 1.2	222.6^d ± 2.3	506.0^d ± 5.2	558.4^e ± 1.9	566.1^e ± 1.9
25	33.6^b ± 2.8	44.7^c ± 1.1	48.7^c ± 1.4	390.3^c ± 1.9	397.0^d ± 1.7	385.5^d ± 1.4
50	13.7^a ± 0.5	16.9^b ± 0.8	20.0^b ± 0.8	52.3^b ± 1.0	63.5^c ± 1.5	71.9^c ± 1.2
100	–	5.0^a ± 0.5	12.2^a ± 1.5	7.1^a ± 0.4	19.8^b ± 1.0	24.6^b ± 1.2
200	–	–	–	–	3.1^a ± 0.4	5.0^a ± 0.6

Means followed by the same letter in the same column are not significantly different according to Tukey's multiple range test at P < 0.05
E*: Emamectin benzoate, I*: Indoxacarb, C*: Chlorantraniliprole

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