Relation between Helicoverpa armigera (Hubner) (Lepidoptera/Noctuidae) mortality and entomopathogenic fungi persistence in soybean leaflets

de Souza, Tamires Doroteo; Fernandes, Fabricio Oliveira; Sanches, Ariadne Costa; do Nascimento, Joacir; Pinto, Antonio Alves; Polanczyk, Ricardo Antônio

doi:10.1186/s41938-022-00508-8

Egyptian Journal of Biological Pest Control

Table 6 Mean parameters (± SE) of the life table of Helicoverpa armigera submitted to different collection times after application of the fungi Beauveria bassiana and Metarhizium anisopliae in the field in the soybean crop for the second year (2020) over a generation at 25 ± 1 °C and 70 ± 10% RH

From: Relation between Helicoverpa armigera (Hubner) (Lepidoptera/Noctuidae) mortality and entomopathogenic fungi persistence in soybean leaflets

Treatments (hrs)	Population parameters
	T (day)	R₀	r (day⁻¹)	\(\mathchar'26\mkern-10mu\lambda\) (day⁻¹)	GRR
Beauveria bassiana
0.5	36.17 ± 0.64 b	42.96 ± 14.96 e	0.103 ± 0.010 Ns	1.109 ± 0.011 Ns	268.5 ± 36.33 b
1	38.41 ± 0.41 b	81.98 ± 19.60 b	0.123 ± 0.006 Ns	1.130 ± 0.007 Ns	258.76 ± 27.81 b
2	39.87 ± 0.17 b	112.64 ± 24.36 a	0.118 ± 0.005 Ns	1.125 ± 0.006 Ns	319.85 ± 28.11 a
3	47.22 ± 0.33 a	70.97 ± 18.05 c	0.090 ± 0.005 Ns	1.094 ± 0.006 Ns	267.54 ± 24.85 b
4	47.22 ± 0.32 a	70.97 ± 18.00 c	0.092 ± 0.005 Ns	1.097 ± 0.005 Ns	109.48 ± 24.83 c
5	47.18 ± 0.34 a	63.44 ± 16.07 d	0.087 ± 0.006 Ns	1.091 ± 0.006 Ns	144.77 ± 28.08 c
6	47.19 ± 0.35 a	58.61 ± 14.49 e	0.086 ± 0.005 Ns	1.090 ± 0.0061 Ns	220.92 ± 15.722 b
7	47.52 ± 0.38 a	72.14 ± 18.31 c	0.090 ± 0.006 Ns	1.094 ± 0.006 Ns	271.92 ± 24.37 b
Metarhizium anisopliae
0.5	41.26 ± 0.58 a	21.78 ± 7.80 e	0.074 ± 0.009 d	1.07 ± 0.001 Ns	211.19 ± 58.56 c
1	36.24 ± 0.65 b	47.26 ± 17.15 d	0.106 ± 0.011 c	1.11 ± 0.012 Ns	294.25 ± 86.97 b
2	47.22 ± 0.32 a	47.22 ± 17.99 d	0.090 ± 0.005 cd	1.09 ± 0.006 Ns	109.48 ± 24.76 d
3	35.91 ± 0.26 b	253.66 ± 39.96 b	0.154 ± 0.004 b	1.16 ± 0.005 Ns	405.68 ± 70.24 a
4	35.82 ± 0.21 b	116.46 ± 32.49 c	0.132 ± 0.008 b	1.14 ± 0.006 Ns	159.64 ± 45.28 cd
5	36.06 ± 0.22 b	314.2 ± 45.49 a	0.159 ± 0.004 b	1.17 ± 0.004 Ns	495.66 ± 71.87 a
6	37.15 ± 0.31 b	118.61 ± 32.47 c	0.218 ± 0.005 a	1.21 ± 0.002 Ns	320.52 ± 85.25 b
7	37.22 ± 0.35 b	152.18 ± 38.32 c	0.190 ± 0.006 ab	1.29 ± 0.006 Ns	261.98 ± 25.38 c
Control
0.5	35.65 ± 0.17 Ns	283.32 ± 24.00 b	0.151 ± 0.003 b	1.16 ± 0.003 Ns	330.41 ± 41.47 b
1	35.51 ± 0.14 Ns	388.31 ± 28.36 a	0.167 ± 0.002 b	1.18 ± 0.002 Ns	450.17 ± 49.53 a
2	35.92 ± 0.23 Ns	302.54 ± 38.27 ab	0.159 ± 0.003 b	1.17 ± 0.004 Ns	490.56 ± 63.73 a
3	35.92 ± 0.23 Ns	303.26 ± 38.27 ab	0.159 ± 0.003 b	1.12 ± 0.003 Ns	485.33 ± 37.41 a
4	35.92 ± 0.26 Ns	254 ± 39.85 b	0.154 ± 0.004 b	1.16 ± 0.005 Ns	399.62 ± 69.09 ab
5	37.18 ± 0.34 Ns	63.45 ± 16.03 d	0.087 ± 0.005 c	1.09 ± 0.006 Ns	339.77 ± 21.75 b
6	37.15 ± 0.31 Ns	288.61 ± 28.52 b	0.316 ± 0.005 a	1.00 ± 0.002 Ns	326.02 ± 65.02 b
7	36.72 ± 0.41 Ns	148.12 ± 25.31 c	0.291 ± 0.006 a	1.05 ± 0.006 Ns	391.95 ± 27.32 ab

The data for each parameter were calculated using the 100.000-color initialization procedure. The means followed by the same letters did not significantly differ from each other (paired initialization test: p > 0.05). T (day)—average duration of a generation, R₀—net reproduction rate, r (day⁻¹)—intrinsic rate of increase, λ—finite rate of increase, GRR—gross reproduction rate, and Ns—not significant

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