Laboratory Of Bioecologia Of Percevejos

Londrina, Brazil

Laboratory Of Bioecologia Of Percevejos

Londrina, Brazil

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Depieri R.A.,Federal University of Paraná | Panizzi A.R.,Laboratory Of Bioecologia Of Percevejos | Panizzi A.R.,Laboratory Of Entomologia
Neotropical Entomology | Year: 2011

Laboratory studies were conducted to compare duration of feeding and superficial and in-depth damage to soybean (Glycine max) seeds by the Southern green stink bug, Nezara viridula (L.), the Neotropical brown stink bug, Euschistus heros (F.), the red-banded stink bug, Piezodorus guildinii (Westwood), and the green-belly stink bug, Dichelops melacanthus (Dallas). Results indicated that feeding time was significantly longer for N. viridula (≈ 133 min) compared to E. heros and D. melacanthus (≈ 70 min), but not different from P. guildinii (≈ 103 min). There was a positive correlation between feeding time and the resulting damage for E. heros, N. viridula and P. guildinii (R2>0.80, P<0.0001), but not for D. melacanthus (R2 = 0.1011, P = 0.1493). The deepest seed damage (2.0 mm) was made by P. guildinii and the shallowest (0.5 mm) by D. melacanthus. The depth of the seed damage by E. heros and N. viridula (0.8, 1.2 mm, respectively) was intermediate in comparison to the other species studied. Feeding damage to the seed endosperm caused variable cell disruption and protein body dissolution, particularly when P. guildinii fed on seeds, suggesting that the deleterious action of salivary enzymes was greater for this bug compared to the others. © 2011 Sociedade Entomológica do Brasil.


Silva F.A.C.,Laboratory Of Bioecologia Of Percevejos | Calizotti G.S.,University Filadelfia Of Londrina Unifil | Panizzi A.R.,Laboratory Of Bioecologia Of Percevejos
Neotropical Entomology | Year: 2011

Survivorship and reproductive performance of the pentatomids Euschistus heros (F.) (EH), Nezara viridula (L.) (NV), and Dichelops melacanthus (Dallas) (DM) were tested in the laboratory. A mixture of natural foods (pods of green beans, Phaseolus vulgaris, raw shelled peanuts, Arachis hypogaea, and fruits of privet, Ligustrum lucidum, and 50 pairs/box (25 x 20 x 20 cm) were used, observed for 30 days, and replicated three times. Thirty days after emergence, mean female survivorship was 91% (EH), 60% (NV), and 30% (DM). More egg masses were deposited during 11-20 days after emergence, with mean number of 45.1 (EH), 5.3 (NV), and 11.8 (DM). These values were smaller during the first 10 days (25.5, 2.1, and 4.7) and last 10 days (21-30 days) (39.4, 3.9, and 4.9), respectively. Mean maximum number of eggs/day was 489 (EH) on day 29, 474 (NV) on day 11, and 153 (DM) on day 14. Mean monthly fecundity (egg masses/box) was 985 (EH), 92 (NV), and 193 (DM), and mean number of eggs/ box was 8,480; 5,147, and 2,042.7, respectively. © 2011 Sociedade Entomológica do Brasil.


Panizzi A.R.,Laboratory Of Bioecologia Of Percevejos | Da Silva J.J.,Laboratory Of Bioecologia Of Percevejos
Neotropical Entomology | Year: 2010

Adults of the tomato stink bug, Arvelius albopunctatus (De Geer), from pasture lands at Londrina, Paraná state (latitude 23o 18' S; longitude 51o 09' W) and of Dichelops furcatus (F.) (Heteroptera: Pentatomidae) from field crops at Cruz Alta, Rio Grande do Sul state (latitude 28o 38' S; longitude) southern Brazil were parasitized by Hexacladia smithii Ashmead, which are set as new host records for this parasitoid.


Silva F.A.C.,Laboratory Of Bioecologia Of Percevejos | da Silva J.J.,Laboratory Of Bioecologia Of Percevejos | Depieri R.A.,Laboratory Of Bioecologia Of Percevejos | Panizzi A.R.,Laboratory Of Entomologia
Neotropical Entomology | Year: 2012

Greenhouse and laboratory studies were conducted to evaluate feeding activity and superficial damage to soybean seed by the brown-winged stink bug, Edessa meditabunda (F.), and the Neotropical brown stink bug, Euschistus heros (F.). Soybean plants (cv. BRS 282), at R6 stage of development were used. Thirty pairs of each species were used individually for 48 h. Two daily observations (9:00 AM and 3:00 PM) were taken to record the number of bugs (feeding/resting) on plant parts. Harvested seeds imbibed in tetrazolium solution were photographed for measurement of the damaged surface. Adult E. meditabunda significantly preferred soybean stems (19.7 bugs) to pods (2.7). Feeding/resting was similar at 9:00 AM (mean number of 28.0 bugs) and 3:00 PM (24.3). Euschistus heros equally fed/stayed on stems (7.3 bugs) and pods (6.9), although most bugs (12.3) remained on the cage net; feeding/resting on all plant structures amounted to 13.7 bugs at 9:00 AM and 17.7 bugs at 3:00 PM. Amylase activity was greater for E. heros (41.61 ± 0.89 U/mg) and almost none for E. meditabunda (2.35 ± 0.14 U/mg). The superficial damage to seeds was significantly greater for E. meditabunda (22.9 mm2) compared to E. heros (12.5 mm2). However, E. meditabunda caused less shrinkage of the seed tegument, while E. heros damage was deeper and seeds showed reduction in size. © 2012 Sociedade Entomológica do Brasil.


PubMed | Laboratory Of Bioecologia Of Percevejos
Type: Journal Article | Journal: Neotropical entomology | Year: 2011

Survivorship and reproductive performance of the pentatomids Euschistus heros (F.) (EH), Nezara viridula (L.) (NV), and Dichelops melacanthus (Dallas) (DM) were tested in the laboratory. A mixture of natural foods (pods of green beans, Phaseolus vulgaris, raw shelled peanuts, Arachis hypogaea, and fruits of privet, Ligustrum lucidum, and 50 pairs/box (25 x 20 x 20 cm) were used, observed for 30 days, and replicated three times. Thirty days after emergence, mean female survivorship was 91% (EH), 60% (NV), and 30% (DM). More egg masses were deposited during 11-20 days after emergence, with mean number of 45.1 (EH), 5.3 (NV), and 11.8 (DM). These values were smaller during the first 10 days (25.5, 2.1, and 4.7) and last 10 days (21-30 days) (39.4, 3.9, and 4.9), respectively. Mean maximum number of eggs/day was 489 (EH) on day 29, 474 (NV) on day 11, and 153 (DM) on day 14. Mean monthly fecundity (egg masses/box) was 985 (EH), 92 (NV), and 193 (DM), and mean number of eggs/box was 8,480; 5,147, and 2,042.7, respectively.


PubMed | Laboratory Of Bioecologia Of Percevejos
Type: Journal Article | Journal: Neotropical entomology | Year: 2010

Adults of the tomato stink bug, Arvelius albopunctatus (De Geer), from pasture lands at Londrina, Paran state (latitude 23 18 S; longitude 51 09 W) and of Dichelops furcatus (F.) (Heteroptera: Pentatomidae) from field crops at Cruz Alta, Rio Grande do Sul state (latitude 28 38 S; longitude) southern Brazil were parasitized by Hexacladia smithii Ashmead , which are set as new host records for this parasitoid.

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