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

Hallan Emannuel Grigório da Silva; Carlos Henrique de Brito; Robério de Oliveira

doi:10.1590/1983-21252022v35n224rc

Authors

Hallan Emannuel Grigório da Silva Universidade Federal da Paraíba, Areia, PB https://orcid.org/0000-0002-3920-8269
Carlos Henrique de Brito Departament of Biological Sciences, Universidade Federal da Paraíba, Areia, PB https://orcid.org/0000-0002-0195-0986
Robério de Oliveira Universidade Federal da Paraíba, Areia, PB https://orcid.org/0000-0002-4590-9934

DOI:

https://doi.org/10.1590/1983-21252022v35n224rc

Keywords:

Biological control. Predator. Fall armyworm. Corn.

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.

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