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10 July 2020 Dispersal of the Zoophytophagous Predator Brontocoris tabidus and Podisus nigrispinus (Heteroptera: Pentatomidae) in an Eucalyptus Plantation
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Abstract

Forest plantations, especially eucalyptus, increase wood supply, avoid deforestation of native plants, and preserve local biodiversity. Defoliating caterpillars often reduce the productivity of these plantations. Rearing and releasing pentatomid predators is a strategy to manage these pests biologically. In this study, the predators Brontocoris tabidus (Signoret) and Podisus nigrispinus (Dallas) (both Heteroptera: Pentatomidae) were evaluated in a clonal eucalyptus (Eucalyptus urophylla Blake × Eucalyptus grandis W. Hill ex Maiden) (both Myrtaceae) plantation. Brontocoris tabidus dispersed further than P. nigrispinus over the 7-d trial. Males of both species dispersed more than females, and most P. nigrispinus were found within 10 m from the release point, whereas the majority of B. tabidus were observed between 15 and 30 m from their initial position of release.

Eucalyptus (Myrtaceae) is a fast growing plant that is primarily grown for charcoal and cellulose (Gomide et al. 2005; Botrel et al. 2007), with Brazil having one of the largest geographic areas planted for this production (Abraf 2013). The establishment of Eucalyptus plantations is important to reduce deforestation of native forests; however, insect pests may damage production of this monoculture. The homogeneity of these ecosystems is often characterized by high food supply combined with low diversity and abundance of natural enemies; this favors increased development of injurious pest populations (Fisher et al. 2008; Nadel et al. 2010; Silva et al. 2010).

Integrated Pest Management (IPM) is a decision-making system whereby control tactics, whether employed singly or in combination (i.e., considering cost per benefit relationships and the impact on producers, society, and environment) in order to maintain pest populations below an economic damage level (Kogan 1998). Sometimes, biological control is an important component of this system because it reduces production costs and improves the quality of agricultural products (due to lower pesticide use), as it improves public health by reducing environmental contamination through unnecessary pesticide residues (Pires et al. 2016).

Stinkbugs of the subfamily Asopinae have been used as biological control agents of agricultural and forest pests because they are generalist predators. The characteristics of these enemies, i.e., widespread occurrence, aggressiveness, and voracity, have made them widely studied in Brazil for use in Integrated Pest Management programs. These pentatomid predators contribute to the regulation of lepidopteran pest populations by consuming defoliating caterpillars. This action reduces pesticide usage in agricultural systems and cultivated forests that may directly improve general environmental conservation efforts in these areas (Vacari et al. 2004, 2007; Torres et al. 2006; De Bortoli et al. 2011).

Asopinae have been intensively studied for the last 80 yr in Brazil. Investigations have included biology (i.e., biological and reproductive parameters), physiology, biochemistry, biological control, ecology, systematics and morphology, toxicology, mass rearing methods, and plant resistance in cooperation with producers in the forest sector (Pires et al. 2015). Members of this subfamily, Podisus maculiventris (Say) and Perillus bioculatus (Fabricius) in North America and Europe, Eocanthecona furcellata (Wolff) in Southeast Asia and India, P. nigrispinus (Dallas), Podisus distinctus (Stål), Brontocoris tabidus (Signoret), and Supputius cincticeps (Stål) (all Heteroptera: Pentatomidae) in South America are the main Asopinae species that have been used in biological control programs (Pires et al. 2016).

The dynamics of predator movement, such as general biological attributes and dispersal patterns in the field, influences the effectiveness of natural enemies in biological control programs (Stinner 1983; Bell 1990; Turchin & Thoeny 1993). For example, body size, developmental time, prey consumption frequency, presence or absence of prey, release time, climate variables, and structural plant characteristics (such as trichome abundance) may affect polyphagous predator movement (Bell 1990; Lachance & Cloutier 1997; Reisig et al. 2013). In order to develop effective release strategies using pentatomid predators in forest and agricultural crops, studies of their dispersal and migration should be conducted. We report here on the dispersal dynamics of the predators B. tabidus and P. nigrispinus when released for use as potential biological control agents in Brazilian eucalyptus plantations.

Material and Methods

Brontocoris tabidus and P. nigrispinus were obtained from the rearing facility at the Universidade Federal de Viçosa in Viçosa, Minas Gerais State, Brazil. Dispersal studies were conducted in a 3-mo-old clonal eucalyptus (Eucalyptus urophylla Blake × Eucalyptus grandis W. Hill ex Maiden [Myrtaceae]) plantation. The study area consisted of 13 ha with approximately 3-m tall plants.

Predators were marked on the pronotum with synthetic enamel paint (Colorama, L'Oréal Brasil Comercial de Cosméticos Ltd., Rio de Janeiro, Brazil) using different colors for each release. Insects were marked 1 d before release, then released 24 h later; sampling was conducted for 7 d.

EXPERIMENTAL DESIGN

Six plots were established in the study area (Fig. 1). One release point (referred to as point zero) was determined per plot. Eight directional markers were placed equidistantly at each release point to determine maximum and minimum limits of the circular area sampled. String wires connecting these markers assisted walking and delimited sampling areas.

Ten releases with 300 individuals each of B. tabidus and P. nigrispinus (50:50 M:F) were released per plot. Mark-release areas were assigned by drawing lots with each release in order to switch habitats and avoid pseudo-replication. Sampling consisted of visual inspection of plants while walking in a spiral beginning at 9:00 AM to avoid the dew effect on this activity, and finishing at 12:00 PM. Samples stations were located at point 0 to 10 m (A-1), 10 to 20 m (A-2), 20 to 30 m (A-3), 30 to 40 m (A-4), 40 to 50 m (A-5), and 50 to 60 m (A-6).

Fig. 1.

Experimental design showing the 6 sample areas in the Viçosa Municipality, Minas Gerais State, Brazil. Map was produced with QGIS version 2.18.3 (Open Source Geospatial Foundation Project,  http://www.qgis.org/ [last accessed 16 Dec 2019]).

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PROCEDURES AND DATA ANALYSIS

Daily dispersal distance of B. tabidus and P. nigrispinus was determined using a 3D Parabolic model in Sigma Plot 10.0 (Systat Software Inc., San Jose, California, USA). These data were then subjected to an F test and means were compared using the Scott-Knott test at P < 0.05 (SAEG 9.1 Statistical Software, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil). In addition, percentage of B. tabidus and P. nigrispinus present every 5 m to 60 m from release point was calculated to determine effective release methodology for both predators in eucalyptus plantations.

Fig. 2.

Daily dispersal distance of the predators Brontocoris tabidus and Podisus nigrispinus (Heteroptera: Pentatomidae) in a clonal eucalyptus Eucalyptus grandis × Eucalyptus urophylla plantation in Viçosa, Minas Gerais State, Brazil. Means followed by the same letter, uppercase or lowercase, do not differ according to the Scott-Knott test with P < 0.05.

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Fig. 3.

Distance traveled by the predators Brontocoris tabidus (A) and Podisus nigrispinus (B) (Heteroptera: Pentatomidae) up to 60 m from release point in a clonal eucalyptus plantation (Eucalyptus grandis × Eucalyptus urophylla) during a 7 d evaluation.

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Fig. 4.

Distance traveled by the predators Brontocoris tabidus (A) and Podisus nigrispinus (B) (Heteroptera: Pentatomidae) males and females in a clonal eucalyptus plantation (Eucalyptus grandis × Eucalyptus urophylla) 7 d after release. Means followed by the same letter do not differ according to the F test with P < 0.05.

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Results

Time period and distance effects on predator dispersal abundance were significant for B. tabidus (F = 10.55; P < 0.05) and P. nigrispinus (F = 24.30; P < 0.05). Brontocoris tabidus dispersal averaged 19.6 m more than P. nigrispinus (F = 1754.8; P < 0.05), and 4.0 m at the end of the 7-d evaluation. Dispersal of both predators (B. tabidus F = 18.86; P < 0.05 and P. nigrispinus F = 49.95; P < 0.05) increased after initial release. Brontocoris tabidus exceeded 10 m in the first d after release where it was observed between 20 and 24 m after the fourth d, whereas P. nigrispinus reached 7.4 m on the seventh d (Fig. 2). Overall B. tabidus abundance peaked at 25.0 m from release point (18.6%) (Fig. 3A). Abundance of P. nigrispinus was highest at the release point (68.9%), then decreased as distance increased (Fig. 3B).

Brontocoris tabidus and P. nigrispinus males dispersed farther than females. Male B. tabidus (F = 151.0; P < 0.05) reached 25.8 m and females 13.5 m at 7 d (Fig. 4A). Male P. nigrispinus (F = 237.2; P < 0.05) reached 7.0 m and females 1.1 m (Fig. 4B). Dispersal behavior of male and female B. tabidus differed with greater numbers of males dispersing between 15 to 30 m. Most females were found 25 m from the release point with no individuals collected at 30 m. Observations of P. nigrispinus males showed that > 10% reached 20 m with some present at 55 m. On the other hand, > 10% of the females were collected at 5 m but none beyond 20 m from the release point (Fig. 5).

Discussion

The short dispersal distance that we observed for B. tabidus and P. nigrispinus may be due to high foliage density of the eucalyptus plants in the cultivated plots. We believe this would reduce visibility of predators and may prevent flights over long distances. Oliveira et al. (2007) stated that landscape characteristics may stimulate or inhibit movements at short or long distances, but with a gradual increase in daily distance traveled by insect predators.

The greater dispersal of B. tabidus than P. nigrispinus in our study may be explained by their larger antennae and greater number of chemoreceptor sensillae of the first species (Pires EM, unpublished data). This may lead to greater success of B. tabidus as a predator because it is generally one of the first species to reach defoliator caterpillar prey outbreaks. This species usually is followed by other pentatomid predators such as P. nigispinus, P. distinctus (Stål), and Tynacantha marginata (Dallas) (Heteroptera: Pentatomidae) (Zanuncio JC, personal communication).

Fig. 5.

Distribution of the predators Brontocoris tabidus and Podisus nigrispinus (Heteroptera: Pentatomidae) males and females in a clonal eucalyptus plantation (Eucalyptus grandis × Eucalyptus urophylla) 7 d after release.

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The gradual increase in distance traveled by the B. tabidus and P. nigrispinus predators over the 7 d may be influenced by prey availability, where they continue to search until a food source is found. The farther distance traveled by B. tabidus and P. nigrispinus males confirms the greater mobility of this sex because they are smaller and lighter than their female counterparts, as reported similarly for Deois flavopicta (Stål) (Hemiptera: Cercopidae) (Sujii et al. 2000). Besides, heteropteran females spend the majority of their adult stage reproducing, whereas dispersal and foraging are secondary behaviors (Clutton-Brock & Vicent 1991; Dukas et al. 2006). The greater abundance of B. tabidus individuals between 15 to 30 m from the release point indicates greater dispersal capacity to search for defoliator caterpillar outbreaks. Although P. nigrispinus dispersal behavior appeared to be limited, it was collected in great numbers at distances > 10 m from release points. Therefore we suggest that both predators could be released at a maximum number of points in Eucalyptus plantations to increase foraging and colonization in order to increase the effectiveness of biological control programs.

Acknowledgments

This research was supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico, Brasilia, Brazil.

References Cited

1.

Associação Brasileira de Produtores de Florestas Plantadas. 2013. Anuário estatístico - associação brasileira de produtores de florestas plantadas. Anuário Estatístico ABRAF: 146. Brasília, Distrito Federal, Brasil. Google Scholar

2.

Bell WJ. 1990. Searching behavior patterns in insects. Annual Review of Entomology 35: 447–467. Google Scholar

3.

Botrel MCG, Trugilho PF, Rosado SCS, Silva JRM. 2007. Melhoramento genético das propriedades do carvão vegetal de Eucalyptus. Revista Árvore 31: 391–398. Google Scholar

4.

Clutton-Brock TH, Vicent ACJ. 1991. Sexual selection and potential reproductive rates of males and females. Nature 351: 58–60. Google Scholar

5.

De Bortoli SA, Otuka AK, Vacari AM, Martins MIEG, Volpe HXL. 2011. Comparative biology and production costs of Podisus nigrispinus (Hemiptera: Pentatomidae) when fed different types of prey. Biological Control 58: 127–132. Google Scholar

6.

Dukas R, Clark CW, Abbott K. 2006. Courtship strategies of male insects: when is learning advantageous? Animal Behaviour 72: 1395–1404. Google Scholar

7.

Fisher L, Salle L, Tetrastichinae HE. 2008. Taxonomy, biology and efficacy of two Australian parasitoids of the eucalyptus. Zootaxa 20: 1–20. Google Scholar

8.

Gomide JL, Colodette JL, Chaves de Oliveira R, Silva CM. 2005. Technological characterization of the new generation of Eucalyptus clones in Brazil for kraft pulp production. Revista Árvore 29: 129–137. Google Scholar

9.

Kogan M. 1998. Integrated pest management: historical perspectives and contemporary developments. Annual Review of Entomology 43: 243–270. Google Scholar

10.

Lachance S, Cloutier C. 1997. Factors affecting dispersal of Perillus bioculatus (Hemiptera: Pentatomidae), a predator of the Colorado potato beetle (Coleoptera: Chrysomelidae). Environmental Entomology 26: 946–954. Google Scholar

11.

Nadel RL, Slippers B, Scholes MC, Lawson SA, Noack AE, Wilcken CF, Bouvet JP, Wingfield MJ. 2010. DNA bar-coding reveals source and patterns of Thaumastocoris peregrinus invasions in South Africa and South America. Biological Invasions 12: 1067–1077. Google Scholar

12.

Oliveira DA, Cola Zanuncio J, Salazar Zanuncio J, Ferreira Martins G, Marques-Silva S, Sossai MF, Serrão JE. 2007. Biochemical and morphological aspects of salivary glands of the predator Brontocoris tabidus (Heteroptera: Pentatomidae). Brazilian Archives of Biology and Technology 50: 469–477. Google Scholar

13.

Pires EM, Nogueira RM, Fernandes BV, Manica CLM. 2016. Predadores Asopinae: sua importância econômica e ambiental, pp. 82–91 In Editora UFV [ed.], Controle Biológico: Estudos, Aplicações e Métodos de Criação de Predadores Asopíneos no Brasil. Viçosa, Minas Gerais, Brazil. Google Scholar

14.

Pires EM, Soares MA, Nogueira RM, Zanuncio JC, Sergio P, Moreira A, Oliveira MA De. 2015. Seven decades of studies with Asopinae predators in Brazil (1933–2014). Bioscience Journal 31: 1530–1549. Google Scholar

15.

Reisig DD, Roe M, Dhammi A. 2013. Dispersal pattern and dispersion of adult and nymph stinkbugs (Hemiptera: Pentatomidae) in wheat and corn. Environmental Entomology 42: 1184–1192. Google Scholar

16.

Silva JO, Oliveira KN, Santos KJ, Espírito-Santo MM, Neves FS, Faria ML. 2010. Efeito da estrutura da paisagem e do genótipo de Eucalyptus na abundância e controle biológico de Glycaspis brimblecombei Moore (Hemiptera: Psyllidae). Neotropical Entomology 39: 91–96. Google Scholar

17.

Stinner ER. 1983. Dispersal and moviment of insect pests. Annual Review of Entomology 28: 19–35. Google Scholar

18.

Sujii ER, Garcia MA, Fontes EMG. 2000. Movimentos de migração e dispersão de adultos da cigarrinha-das-pastagens. Pesquisa Agropecuaria Brasileira 35: 471–480. Google Scholar

19.

Torres JB, Zanuncio JC, Moura MA. 2006. The Predatory Stinkbug Podisus nigrispinus: Biology, Ecology and Augmentative Releases for Lepidoperan Larval Control in Eucalyptus Forests in Brazil. Perspectives in Agriculture, Veterinary Science, Nutrition and Natural Resources 1. https://doi.org/10.1079/pavsnnr20061015 Google Scholar

20.

Turchin P, Thoeny WT. 1993. Quantifying dispersal of southern pine beetles with mark-recapture experiments and a diffusion model. Ecological Applications 3: 187–198. Google Scholar

21.

Vacari AM, Albergaria NMMN, Otuka AK, Dória HO, Loureiro E, De Bortoli SA. 2004. Seletividade de óleo de nim (Azadirachta indica A. Juss) sobre Podisus nigrispinus (Dallas, 1851) (Heteroptera: Pentatomidae). Arquivos do Instituto Biológico 71: 190–194. Google Scholar

22.

Vacari AM, Otuka K, Bortoli D. 2007. Desenvolvimento de Podisus nigrispinus alimentado com lagartas de Diatraea saccharalis (Fabricius, 1794) (Lepidoptera: Crambidae). Arquivos do Instituto Biológico 74: 259–265. Google Scholar
Evaldo Martins Pires, José Cola Zanuncio, Roberta Martins Nogueira, Marcus Alvarenga Soares, and Marco Antônio de Oliveira "Dispersal of the Zoophytophagous Predator Brontocoris tabidus and Podisus nigrispinus (Heteroptera: Pentatomidae) in an Eucalyptus Plantation," Florida Entomologist 103(2), 168-171, (10 July 2020). https://doi.org/10.1653/024.103.0203
Published: 10 July 2020
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