Non-targeted insecticidal stress in a pest species: insecticides, sexual fitness and hormesis in the Neotropical brown stink bug Euschistus heros

The Neotropical brown stink bug, Euschistus heros (Fabr.), was collected on sunflower [Helianthus annuus (L.)], soybean [Glycine max (L.) Merrill], star bristle [Acanthospermum hispidum (DC.)], and under fallen leaves of mango tree [Mangifera indica (L.)] and privet (Ligustrum lucidum Ait.), during one year, to evaluate the diapause incidence and the occurrence of different seasonal morphs. The majority of the insects (ca. 90%) with mature reproductive organs was observed during the summer (December-March), when E. heros was found on soybean or on sunflower; in the beginning of autumn, most insects (87%) showed immature reproductive organs, and they were found on star bristle and under fallen leaves. Bugs with mature reproductive organs had more developed shoulders (3.23 and 3.27 mm, for males and females, respectively) than bugs with immature organs (2.91 and 2.89 mm, for males and females, respectively). Two distinct body colors, dark brown and reddish brown, were observed. Nevertheless, the reddish brown was the predominant color of both mature and immature adults during all year. Adults were parasitized by Hexacladia smithii (Ashmead) (Hymenoptera: Encyrtidae) and Tachinidae mainly Trichopoda giacomellii (Blanchard) (Diptera: Tachinidae) (80% and 40% of parasitism in male and female, respectively) during summer (December), when the bugs colonized sunflower. In soybean, 12% of males and 10% of females were parasitized, whereas in fallen leaves, the parasitism rate was 5% in both sexes.These results showed that in autumn/winter (shorter photoperiod) the majority of the insects were inactive under fallen leaves, showing immature reproductive organs and less developed shoulders, indicating that, at this time, these bugs were in diapause.

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Sublethal Concentration of Pyriproxyfen Reduces Testicular Connective Tissue Thickness in Euschistus heros Fabr. (Hemiptera: Pentatomidae)

Journal of Agricultural Science ◽

10.5539/jas.v13n9p27 ◽

2021 ◽

Vol 13 (9) ◽

pp. 27

Author(s):

Janaina F. Matsumoto ◽

Paulo S. G. Cremonez ◽

Samuel Roggia ◽

Angela M. F. Falleiros ◽

Sheila M. Levy ◽

...

Keyword(s):

Connective Tissue ◽

Sublethal Concentration ◽

Experimental Unit ◽

Stink Bug ◽

Hormone Analogue ◽

Working Pressure ◽

Morphometric Analyses ◽

Euschistus Heros ◽

Different Types ◽

Randomized Experimental Design

The aim of this study was to determine the effect of the insecticide pyriproxyfen (Tiger™ 100 CE), juvenile hormone analogue, when applied in a sublethal LC30 concentration (0.668 mL a. i. L-1), on the morphological and morphometric parameters of external and internal connective tissue (CT) of the Neotropical-brown stink bug Euschistus heros testicles. The insecticide was applied on nymphs from the 4th instar using a Potter tower with a working pressure of 82.73 kPa (12 lb pol-²) and 1 mL of the emulsion per replicate. A completely randomized experimental design was used, consisting of two treatments (control and pyriproxyfen-treated), five repetitions, and 10 adults of E. heros per experimental unit. The insects were maintained under controlled conditions until the emergence of adults. After 48 h of emergence of adults, the testicles were collected, fixed, and processed for morphological and morphometric analyses. A change was observed in the collagen fibers of the CT of treated insects when compared with those of controls. It was also observed that both types of CT (dense irregular and loose) over the internal tunic of the treated insect were thinner than those in control insects. The analysis showed that pyriproxyfen significantly reduced the external and internal CT width and the conformation of its fibers in all the observed regions when compared with the controls; this may affect the production of the three different types of sperm present in this species.

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Parâmetros biológicos de Euschistus heros (Fabricius, 1794) alimentado com diferentes dietas

Revista Agraria Academica ◽

10.32406/v4n12021/152-159/agrariacad ◽

2021 ◽

Vol 4 (1) ◽

pp. 152-159

Author(s):

Yves Pierre Harry Dalleinne ◽

◽

Aline Giothi ◽

Rosane Betina Wandscheer ◽

Ivonete Hoss ◽

...

Keyword(s):

Food Preference ◽

Eating Habits ◽

Feeding Preference ◽

Stink Bug ◽

Euschistus Heros ◽

Males And Females ◽

Seeds And Fruits

During their development, insects can suck plant structures like seeds and fruits being the preferred structures. The study aims to monitor the eating habits of these insects are relevant mainly in terms of food preference and development. The objective of this work was to analyze the feeding preference of Euschistus heros (brown stink bug) fed with 5 diets. The different diets studied resulted in insects in adult, with significant differences in the length of the nymph period, differences in the weights of males and females and variation in survival during the experiment.

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Pentatomids associated with blackberry

Ciência e Agrotecnologia ◽

10.1590/s1413-70542014000300005 ◽

2014 ◽

Vol 38 (3) ◽

pp. 256-261

Author(s):

Mauricio Paulo Batistella Pasini ◽

Alessandro Dal'Col Lúcio

Keyword(s):

Rio Grande ◽

Nezara Viridula ◽

Brown Spot ◽

Stink Bug ◽

Stink Bugs ◽

Rio Grande Do Sul ◽

Dark Brown Spot ◽

Euschistus Heros ◽

Santa Maria ◽

Piezodorus Guildinii

Information concerning the presence of stink bugs in blackberry (Rubus spp.) in Brazil is sparse. This study aimed to identify the stink bug species associated with blackberry, to establish the daily dynamics and evaluate the fruits damage. The experiment was conducted in Santa Maria, Rio Grande do Sul State, Brazil, in blackberry orchard. Presence and evaluations of stink bugs were done weekly through visual and sweeping samplings at different day times. Five species of pentatomids were identified: Piezodorus guildinii, Nezara viridula, Euschistus heros, Dichelops furcatus and Edessa meditabunda. The bugs attack the drupelets producing a dark brown spot and wrinkled berries.

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Cytotoxicity of Piper aduncum (Piperaceae) essential oil in brown stink bug Euschistus heros (Heteroptera: Pentatomidae)

Ecotoxicology ◽

10.1007/s10646-019-02072-8 ◽

2019 ◽

Vol 28 (7) ◽

pp. 763-770 ◽

Cited By ~ 4

Author(s):

Jamile F. S. Cossolin ◽

Mônica J. B. Pereira ◽

Luis C. Martínez ◽

Leonardo M. Turchen ◽

Muhammad Fiaz ◽

...

Keyword(s):

Essential Oil ◽

Stink Bug ◽

Euschistus Heros ◽

Heteroptera Pentatomidae ◽

Piper Aduncum

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Insecticide resistance to endosulfan, monocrotophos and metamidophos in the neotropical brown stink bug, Euschistus heros (F.)

Neotropical Entomology ◽

10.1590/s1519-566x2001000200017 ◽

2001 ◽

Vol 30 (2) ◽

pp. 317-320 ◽

Cited By ~ 28

Author(s):

DANIEL R. SOSA-GOMEZ ◽

IVAN C. CORSO ◽

LAURO MORALES

Keyword(s):

Insecticide Resistance ◽

Stink Bug ◽

Euschistus Heros

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Characterization and Comparison of Intestinal Bacterial Microbiomes of Euschistus heros and Piezodorus guildinii Collected in Brazil and the United States

Frontiers in Microbiology ◽

10.3389/fmicb.2021.769965 ◽

2021 ◽

Vol 12 ◽

Author(s):

Matheus Sartori Moro ◽

Xing Wu ◽

Wei Wei ◽

Lucas William Mendes ◽

Kerry Clint Allen ◽

...

Keyword(s):

United States ◽

The United States ◽

Microbial Pathogens ◽

Intestinal Microbiome ◽

Rrna Gene ◽

Stink Bug ◽

Stink Bugs ◽

Physical Damage ◽

Euschistus Heros ◽

Piezodorus Guildinii

Background: Herbivorous insects are one of the main biological threats to crops. One such group of insects, stink bugs, do not eat large amounts of tissue when feeding on soybean, but are damaging to the quality of the seed yield as they feed on green developing seeds leading to poorly marketable harvests. In addition to causing physical damage during sucking-feeding activities, the insects can also transmit microbial pathogens, leading to even greater yield loss. Conducting surveys of the insect intestinal microbiome can help identify possible pathogens, as well as detail what healthy stink bug digestive systems have in common.Methods: We used the conserved V4 region of the 16S rRNA gene to characterize the bacterial microbiome of the red-banded stink bug Piezodorus guildinii collected in Brazil and the United States, as well as the neotropical brown stink bug Euschistus heros collected in Brazil.Results: After quality filtering of the data, 192 samples were kept for analyses: 117 samples from P. guildinii covering three sites in Brazil and four sites in the United States, and 75 samples for E. heros covering 10 sites in Brazil. The most interesting observations were that the diversity and abundance of some bacterial families were different in the different ecoregions of Brazil and the United States.Conclusion: Some families, such as Acetobacteraceae, Bacillaceae, Moraxellaceae, Enterobacteriaceae, and Rhodocyclaceae, may be related to the better adaptation in some localities in providing nutrients, break down cellulose, detoxify phytochemicals, and degrade organic compounds, which makes it difficult to control these species.

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Chloris distichophylla Lag. (Poaceae) as stink bug (Pentatomidae) shelter in soybean and corn off-season in southern Brazil

10.1101/670943 ◽

2019 ◽

Author(s):

Eduardo Engel ◽

Mauricio P. B. Pasini ◽

Daniele C. Hörz ◽

Rafael P. Bortolotto

Keyword(s):

Data Analysis ◽

Population Density ◽

Stink Bug ◽

Stink Bugs ◽

Southern Brazil ◽

Euschistus Heros ◽

Composition Structure

AbstractThe objective of this study was to evaluate the composition and abundance of dormant bedbugs in Chloris distichophylla Lag (Poales: Poaceae) over the soybean and corn off-season. The work was carried out in the municipality of Cruz Alta, over the soybean and corn off-season between 2014 and 2018. Plants of C. distichophylla with different clump diameter were sampled, and the bugs contained in them were counted and submitted to data analysis for the evaluation of the composition, structure, and diversity of occurring species. At the end of the experiment, 3543 hibernating adults were counted and divided into six species: Euschistus heros (F.), Dichelops furcatus (F.), Dichelops melacanthus Dallas, Edessa meditabunda (F.), Edessa ruformaginata (De Geer) (Hemiptera: Pentatomidae). The species E. heros was the most abundant, followed by D. furcatus. The diameter of the clumps directly affects the population density of the stink bugs. Finally, C. distichophylla is shown as a hibernate favorable to the maintenance of the stink bug populations over the soybean and corn off-season.

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