BIOLOGICAL ASPECTS AND PREDATORY CAPACITY OF <i>Doru luteipes</i> WHEN FED WITH <i>Spodoptera frugiperda</i>

DA SILVA, HALLAN EMANNUEL GRIGÓRIO; DE OLIVEIRA, ROBÉRIO; DE BRITO, CARLOS HENRIQUE

doi:10.1590/1983-21252022v35n224rc

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Research Paper • Rev. Caatinga 35 (02) • Apr-Jun 2022 • https://doi.org/10.1590/1983-21252022v35n224rc copy

BIOLOGICAL ASPECTS AND PREDATORY CAPACITY OF Doru luteipes WHEN FED WITH Spodoptera frugiperda

ASPECTOS BIOLÓGICOS E CAPACIDADE PREDATÓRIA DE Doru luteipes QUANDO ALIMENTADA COM Spodoptera frugiperda

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Biological aspects and predatory capacity of Doru luteipes was assessed as a function of predation on Spodoptera frugiperda. The experiment was conducted under laboratory conditions of mean temperature of 25 ± 1 °C, relative humidity of 70 ± 10%, and 12:12 h (Light: Dark) photoperiod. To evaluate the biological parameters of D. luteipes, artificial diet, eggs and caterpillar (1^st, 2^nd, 3^rd, 4^th, 5^th or 6^th instars) of S. frugiperda were supplied. The completely randomized statistical design was used, with 10 replicates for each treatment. The nymphs (1^st, 2^nd and 3^rd instars) and adult males and females of D. luteipes were individualized in Petri dish (9 cm diameter), with artificial diet as standard food (control). Nymphs of the 1^st and 3^rd instars of the predator lasted 4.5 and 6.9, days respectively, but they perished. The survival of D. luteipes is high, but there was variation when consuming the different instars of the caterpillar of S. frugiperda. Adults of D. luteipes did not consume caterpillars of the 4^th, 5^th and 6^th instars of the prey. There was a significant difference for the feeding of D. luteipes with artificial diet, eggs and caterpillar of S. frugiperda with respect to the parameters number of eggs and preoviposition. Higher consumption of male and female D. luteipes occurs when they are fed with prey eggs.

Keywords
Biological control; Predator; Fall armyworm; Corn

Food	Duration
Food	1^st instar	2^nd instar^* * Nymphs of D. luteipes of 1st instar fed with artificial diet;	3^rd instar^ Nymphs of D. luteipes 1st and 2nd instars fed with artificial diet.
Artificial diet	5.9 ± 0.6 a	17.7 ± 2.5 a	14.4 ± 3.1 a
Spodoptera frugiperda eggs	3.8 ± 0.4 a	4.9 ± 1.1 b	9.4 ± 2.1 ab
1^st instar caterpillar of S. frugiperda	2.3 ± 0.7 a	7.1 ± 0.3 b	10.5 ± 0.5 ab
2^nd instar caterpillar of S. frugiperda	3.9 ± 1.2 a	7.5 ± 1.6 b	11.6 ± 1.0 ab
3^rd instar caterpillar of S. frugiperda	3.4 ± 1.1 a	5.8 ± 1.7 b	5.0 ± 2.7 b
4^th instar caterpillar of S. frugiperda	3.2 ± 0.4 a	5.3 ± 1.1 b	5.6 ± 2.6 b
5^th instar caterpillar of S. frugiperda	4.7 ± 0.7 a	6.6 ± 1.1 b	8.2 ± 2.3 ab
6^th instar caterpillar of S. frugiperda	4.5 ± 0.5 a	4.9 ± 1.4 b	6.9 ± 3.7 b
CV (%)		31.81

	Survival
	1^st instar	2^nd instar^* * Nymphs of D. luteipes of 1st instar fed with artificial diet;	3^rd instar^ Nymphs of D. luteipes 1st and 2nd instars fed with artificial diet.
Artificial diet	100.0	100.0	100.0
Spodoptera frugiperda eggs	100.0	80.0	100.0
1^st instar caterpillar of S. frugiperda	80.0	100.0	100.0
2^nd instar caterpillar of S. frugiperda	60.0	100.0	100.0
3^rd instar caterpillar of S. frugiperda	50.0	30.0	20.0
4^th instar caterpillar of S. frugiperda	80.0	80.0	10.0
5^th instar caterpillar of S. frugiperda	90.0	80.0	20.0
6^th instar caterpillar of S. frugiperda	00.0	20.0	00.0

Food	Longevity		Survival
Food	Female^* * Nymphs of D. luteipes of 1st, 2nd, 3rd and 4th instars fed with artificial diet.	Male^* * Nymphs of D. luteipes of 1st, 2nd, 3rd and 4th instars fed with artificial diet.	Female^* * Nymphs of D. luteipes of 1st, 2nd, 3rd and 4th instars fed with artificial diet.	Male^* * Nymphs of D. luteipes of 1st, 2nd, 3rd and 4th instars fed with artificial diet.
Artificial diet	58.3 ± 4.2 a	58.3 ± 0.4 a	100.0	100.0
Spodoptera frugiperda eggs	45.0 ± 1.2 b	44.5 ± 0.4 a	100.0	100.0
1^st instar caterpillar of S. frugiperda	44.8 ± 0.4 b	44.5 ± 0.0 a	100.0	100.0
2^nd instar caterpillar of S. frugiperda	45.1 ± 0.7 b	46.0 ± 0.0 a	100.0	100.0
3^rd instar caterpillar of S. frugiperda	41.9 ± 6.3 b	39.5 ± 0.0 a	100.0	100.0
CV (%)	7.36	12.74

Food	Doru luteipes ^* * Nymphs of D. luteipes of 1st, 2nd, 3rd and 4th instars fed with artificial diet.
Food	EN	LN	EV (%)	POP (days)	IP (days)
Artificial diet	22.1 ± 3.0 a	1.2 ± 0.4 a	71.7 ± 36.2 a	32.4 ± 2.6 a	8.0 ± 0.0 a
Spodoptera frugiperda eggs	20.3 ± 3.0 a	1.1 ± 0.4 a	36.6 ± 45.2 a	24.3 ± 1.2 b	7.9 ± 0.6 a
1^st instar caterpillar of S. frugiperda	20.0 ± 0.0 ab	1.0 ± 0.0 a	78.8 ± 36.14 a	24.3 ± 1.5 b	8.0 ± 0.0 a
2^nd instar caterpillar of S. frugiperda	12.8 ± 6.0 b	1.0 ± 0.0 a	62.5 ± 40.2 a	24.8 ± 0.4 b	7.7 ± 0.8 a
3^rd instar caterpillar of S. frugiperda	16.9 ± 4.5 ab	1.0 ± 0.0 a	43.4 ± 47.0 a	25.1 ± 0.9 b	7.9 ± 0.9 a
CV%	20.64	26.60	73.16	6.07	7.84

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