Seasonal occurrence of Tachinid parasitism on stink bugs with different overwintering strategies

Panizzi, Antônio R.; Oliveira, Eliege Aparecida de Paiva

doi:10.1590/s0301-80591999000100018

Cited by 20 publications

(20 citation statements)

References 5 publications

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“…Another pentatomid pest of soybean, Euschistus heros (Fabricius), also enters into diapause on the soil underneath fallen dead leaves, after the crop is harvested (Panizzi & Vivan 1997). This behavior protects the bugs from parasitism by tachinid flies, what does not happen with the pentatomid, Nezara viridula (L.), which does not hide but continues to feed on alternate host plants during mild winters of the neotropics (Panizzi 1997, Panizzi & Oliveira 1999.…”

Section: Resultsmentioning

confidence: 99%

Impact of cultivation systems on Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae) population and damage and its chemical control on wheat

Chocorosqui¹,

Panizzi²

2004

Neotrop. Entomol.

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PALAVRAS-CHAVE: Insecta, insecticida, percevejo, plantio direto, tratamento de sementes ABSTRACT -Results of field evaluations indicated that the neotropical pentatomid Dichelops melacanthus (Dallas) is associated with wheat, Triticum aestivum L. In the no-tillage cultivation system, adults and nymphs were mostly found on the soil, near the plant stems and underneath crop residues of the preceding summer crop, usually soybean, Glycine max (L.) Merrill, or corn, Zea mays L. Wheat grown under the conventional cultivation system showed minimal bug attack. D. melacanthus caused substantial damage to no-tillage wheat plants, particularly to seedlings. Bug attack reduces the number of seed heads of up to 34%. Seed yield was reduced in 31% due to the bugs' feeding, compared to plants free of damage. All developmental phases of the wheat plant were susceptible to the attack of D. melacanthus, and the greatest yield reduction occurred from stem elongation (26.5%) to milky grain stage (33.1%). Seed treatment using insecticides was efficient, greatly reducing the grain production losses.

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Section: Resultsmentioning

confidence: 99%

Impact of cultivation systems on Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae) population and damage and its chemical control on wheat

Chocorosqui¹,

Panizzi²

2004

Neotrop. Entomol.

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“…viridula collected in the field in February had higher egg production compared to the laboratory population, which can be explained by the high fecundity of this stink bug specie and low parasitism index for Tachinidae, which occurs in this period in field populations (Corrêa-Ferreira & Panizzi 1999). However, N. viridula collected in the field for setting up a large scale colony may be used with criterion, because parasitism rates by Tachinidae can be high in some periods of the year (Panizzi & Oliveira 1999) and, as a consequence, the egg production can be reduced (Corrêa-Ferreira & Godoy, unpublished).…”

Section: Resultsmentioning

confidence: 99%

Nymphal and Adult Performance of Euschistus heros (Fabr.) (Hemiptera: Pentatomidae), as a Potential Alternative Host for Egg Parasitoids Multiplication

Peres¹,

Corrêa-Ferreira²

2001

Neotrop. Entomol.

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-This research aimed to evaluate the potential of Euschistus heros (Fabr.) (Hemiptera: Pentatomidae) as host for multiplication of egg parasitoids, by determining the nymphal and adult performance of E. heros from laboratory and the field, comparing with Nezara viridula (L.) (Hemiptera: Pentatomidae), under mass conditions. One hundred eggs of E. heros and N. viridula were placed among the leaves of soybean plants contained in cages (50x50x70 cm) and observation were made until adult emergence. The nymphs fed on soybean pods, dry soybean and peanuts seeds. The number of nymphs that reached adulthood and the development time were calculated. The survivorship and reproduction performance of laboratory and field populations of E. heros and N. viridula were evaluated during 13 weeks in February-May 1999. The number of eggs produced by 100 pairs of stink bugs per cage containing the same diet was recorded. Nymphal development time of E. heros and N. viridula was 33.0 and 34.0 days and 65.0% and 71.3% of nymphs reached adulthood, respectively. Adults of E. heros reared under laboratory conditions produced 2.5 times more eggs (5547.0 eggs/ cage) than those collected in the field (2262.7 eggs/cage). The adult field population of E. heros had reduced reproduction and longevity due to parasitism by Hexacladia smithii Ash. (Hymenoptera: Encyrtidae). The N. viridula adults collected in the field produced 1.7 times more eggs (6304.9 eggs/cage) than those reared in the laboratory (3609.2 eggs/cage). E. heros laboratory reared is a promising host for egg parasitoids multiplication when compared with N. viridula collected in the field.KEY WORDS: Insecta, Glycine max, southern green stink bug, neotropical brown stink bug, rearing.

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“…5) variou de acordo com a época do ano. Em janeiro, quando os insetos alimentaram-se da soja no campo e, portanto, estavam mais expostos ao parasitismo, a percentagem de insetos parasitados chegou a quase 30,0%, decaindo no final de março/início de abril, com a chegada do outono, quando os adultos começam a procura dos abrigos de inverno; isso concorda com Panizzi & Oliveira (1999), que encontraram 37,0% de parasitismo em E. heros, no mês de janeiro, e 0,0%, de julho a outubro. É nítido o aumento da percentagem de insetos parasitados (quase 50,0%), coincidindo com a saída dos percevejos da palhada e o início da colonização da cultura do girassol (novembro), atingindo índices ainda mais altos no final de dezembro; isto ocorre talvez porque, no girassol, os insetos ficam mais concentrados e expostos nos capítulos, sendo melhor localizados pelos parasitóides.…”

Section: Junho 2000unclassified

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

Mourão

Panizzi

2000

An. Soc. Entomol. Bras.

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, 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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Seasonal occurrence of Tachinid parasitism on stink bugs with different overwintering strategies

Cited by 20 publications

References 5 publications

Impact of cultivation systems on Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae) population and damage and its chemical control on wheat

Impact of cultivation systems on Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae) population and damage and its chemical control on wheat

Nymphal and Adult Performance of Euschistus heros (Fabr.) (Hemiptera: Pentatomidae), as a Potential Alternative Host for Egg Parasitoids Multiplication

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

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