Histology of Damage Caused by Euschistus heros (F.) Nymphs in Soybean Pods and Seeds

2021 ◽  
Author(s):  
Magda Andréia Tessmer ◽  
Taciana Melissa de Azevedo Kuhn ◽  
Beatriz Appezzato-da-Glória ◽  
João Roberto Spotti Lopes ◽  
Greice Erler ◽  
...  
Keyword(s):  
Euschistus Heros

Potential of Ficus carica extracts against Euschistus heros : toxicity of major active compounds and selectivity against beneficial insects

2021 ◽  
Author(s):  
Isabella O. Britto ◽  
Sabrina H. C. Araújo ◽  
Pedro F. S. Toledo ◽  
Graziela D. A. Lima ◽  
Iorrana V. Salustiano ◽  
...  
Keyword(s):  
Ficus Carica ◽  
Active Compounds ◽  
Beneficial Insects ◽  
Euschistus Heros

scholarly journals Natural parasitism of Hexacladia smithii Ashmead (Hymenoptera: Encyrtidae) on Euschistus heros (F.) (Hemiptera: Pentatomidae): new record from Mato Grosso State, Brazil

2016 ◽  
Vol 82 (0) ◽  
Author(s):  
Leonardo Morais Turchen ◽  
Vanessa Golin ◽  
Bruna Magda Favetti ◽  
Alessandra Regina Butnariu ◽  
Valmir Antônio Costa
Keyword(s):  
Biological Control ◽  
New Record ◽  
Insect Pest ◽  
First Record ◽  
Insect Control ◽  
Conventional System ◽  
Mato Grosso ◽  
Random Samples ◽  
Euschistus Heros ◽  
Natural Parasitism

The neotropical stink brown bug, Euschistus heros (F.) (Hemiptera: Pentatomidae), is an insect pest to soybean crops in Mato Grosso State, Brazil. In this region, synthetic insecticides are frequently used for insect control. An alternative to the indiscriminate use of insecticides is the biological control with parasitoids. Thus, the objective of this study was to conduct the survey of parasitoids that use E. heros adults as hosts. Random samples were conducted during the harvests of 2009/10 and 2010/11 in two farms that produce soybean (conventional system) in Tangará da Serra, Mato Grosso State, Brazil. The total number of collected E. heros was: 297 (Field 1) and 293 (Field 2) in 2009/10 and 295 (Field 1) and 376 (Field 2) in 2010/11. Of these, 1.50 (Field 1) and 13.99% (Field 2) were parasitized in 2009/10 and 8.47 (Field 1) and 7.45% (Field 2) in 2010/11. The parasitoids found were Hexacladia smithii Ashmead (Hymenoptera: Encyrtidae) in both fields. This is the first record of parasitism in E. heros adults in the state of Mato Grosso, Brazil.

scholarly journals Attraction of Telenomus podisi to volatiles induced by Euschistus heros in three different plant species

2016 ◽  
Vol 10 (5) ◽  
pp. 419-428 ◽  
Author(s):  
Aline Moreira Dias ◽  
Martín Pareja ◽  
Maycon Laia ◽  
Maria Carolina Blassioli-Moraes ◽  
Miguel Borges ◽  
...  
Keyword(s):  
Plant Species ◽  
Euschistus Heros ◽  
Telenomus Podisi

scholarly journals Biologia reprodutiva de Euschistus heros (F.) (Heteroptera: Pentatomidae)

1998 ◽  
Vol 27 (4) ◽  
pp. 559-568 ◽  
Author(s):  
Maria L.M. Costa ◽  
Miguel Borges ◽  
Evaldo F. Vilela
Keyword(s):  
Euschistus Heros ◽  
Heteroptera Pentatomidae

Estudou-se a biologia de Euschistus heros (F.) (Heteroptera: Pentatomidae) em laboratório sob 24±0,5ºC, 70±10% UR e fotofase de 14 h. O tempo médio de desenvolvimento até adulto foi de 38,6 d, sendo o 2º estádio ninfal, o de maior índice de mortalidade (10,4%). A longevidade de E. heros variou de acordo com o sexo e atividade sexual. Machos e fêmeas atingiram a maturidade sexual com 11,4 e 11,2 d, respectivamente. O tempo médio para a colocação de posturas, após o primeiro acasalamento, variou de 9,1 d para fêmeas, que acasalaram uma única vez, até 13,9 dias para fêmeas que acasalaram várias vezes durante o período de sobrevivência. O número médio de ovos por fêmea variou de 108,5 até 130,5, dependendo do número de acasalamento das fêmeas estudadas. Juntamente com a deposição das massas de ovos, foi observada a colocação de posturas isoladas com percentagens de 71,7 e 77,8 respectivamente, também dependendo do número de acasalamentos.

scholarly journals Cultivation of resistant soybean varieties and application of silicon (Si) on biology of Euschistus heros (Hemiptera: Pentatomidae)

2016 ◽  
Vol 10 (10) ◽  
pp. 1404-1409 ◽  
Author(s):  
Paulo Vinicius de Souza ◽  
◽  
Bruna Ribeiro Machado ◽  
Jose Cola Zanuncio ◽  
Marcio Silva Araújo ◽  
...  
Keyword(s):  
Euschistus Heros

scholarly journals Resistência de soja a insetos: VI. Comportamento de genótipos em relação a percevejos

Bragantia ◽  
1986 ◽  
Vol 45 (2) ◽  
pp. 323-335 ◽  
Author(s):  
Carlos Jorge Rossetto ◽  
Toshio Igue ◽  
Manoel Albino Coelho de Miranda ◽  
André Luiz Lourenção
Keyword(s):  
Nezara Viridula ◽  
Euschistus Heros ◽  
Piezodorus Guildinii

O comportamento de trinta e cinco genótipos de soja foi estudado em condições de campo, em Campinas, SP, em relação ao ataque dos percevejos pentatomídeos Euschistus heros (F.), Piezodorus guildinii (Westwood) e Nezara viridula (L.). A infestação natural do campo experimental foi suplementada com a liberação de percevejos adultos. Em 1983/1984, o dano médio sofrido pelos genótipos foi moderado e, em 1984/1985, severo. Três critérios foram utilizados para avaliar a resistência das variedades: a porcentagem de área foliar retida após a maturação das vagens, o índice porcentual de dano de vagem e a produção de grãos. A testemunha suscetível usada foi o cultivar Paraná, que produziu apenas 402kg/ha e 31kg/ha em 1983/ 1984 e 1984/ 1985 respectivamente. A linhagem IAC 80/4228 apresentou uma resistência estável, tendo produzido 1.675kg/ha e 1.639kg/ha em 1983/1984 e 1984/1985 respectivamente.

scholarly journals Diapause and different seasonal morphs of Euschistus heros (Fabr.) (Hemiptera: Pentatomidae) in Northern Paraná State

2000 ◽  
Vol 29 (2) ◽  
pp. 205-218 ◽  
Author(s):  
Ana P. M. Mourão ◽  
Antônio R. Panizzi
Keyword(s):  
Mangifera Indica ◽  
Reproductive Organs ◽  
Stink Bug ◽  
Ligustrum Lucidum ◽  
Mango Tree ◽  
Euschistus Heros ◽  
Males And Females ◽  
Fallen Leaves ◽  
Diapause Incidence ◽  
In The Beginning

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.

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

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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