| morphology, distribution and abundance of antennal sensilla in three stink bug species (hemiptera: pentatomidae). | the neotropical stink bugs, euschistus heros, piezodorus guildinii and edessa meditabunda, are important pests of soybean and other crops throughout central america and in south america from northern argentina to brazil. mate finding and host plant location in these species depend largely on their chemical communication, and semiochemicals are important mediators of these behaviors. in this study scanning electron microscopy was used to examine the external morphology, distribution and abundance ... | 2010 | 20096594 |
| natural incidence of egg parasitoids of edessa meditabunda (f.) (hemiptera: pentatomidae) on crotalaria spectabilis in campo novo do parecis, mt, brazil. | egg parasitoids of the stink bug edessa meditabunda (f) were studied on rattlepod crotalaria spectabilis used in soybean crop rotation in campo novo do parecis, mato grosso state, central western brazil. seven species of parasitoids were found: two encyrtidae, one eurytomidae, and four platygastridae. the occurrence of trissolcus euchisti (ashmead) and trissolcus elimatus johnson (platygastridae) on eggs of e. meditabunda is recorded for the first time. moreover, this is the first record of t. e ... | 2011 | 22068950 |
| the gastric caeca of pentatomids as a house for actinomycetes. | microbes are extensively associated with insects, playing key roles in insect defense, nutrition and reproduction. most of the associations reported involve proteobacteria. despite the fact that actinobacteria associated with insects were shown to produce antibiotic barriers against pathogens to the hosts or to their food and nutrients, there are few studies focusing on their association with insects. thus, we surveyed the actinobacteria diversity on a specific region of the midgut of seven spec ... | 2012 | 22682021 |
| response of soybean genotypes challenged by a stink bug complex (hemiptera: pentatomidae). | pentatomids (stink bugs) are major pests of soybean, glycine max (l.) merril. these pests reach high levels of infestation, cause severe damage to seeds by feeding, are linked to leaf retention, and are difficult to control. host plant resistance is considered to be a valuable tool in integrated pest management and can assist in reducing the damage caused by stink bugs. this research evaluated the resistance of soybean genotypes in brazil to the stink bug complex, the neotropical brown stink bug ... | 2016 | 26662735 |
| storage of pentatomid eggs in liquid nitrogen and dormancy of trissolcus basalis (wollaston) and telenomus podisi ashmead (hymenoptera: platygastridae) adults as a method of mass production. | the eggs of pentatomid species were evaluated to parasitism by trissolcus basalis (wollaston) and telenomus podisi ashmead after storage in liquid nitrogen. adults which emerged from stored eggs were kept at 18°c for 120 and 180 days to investigate whether adult dormancy could be associated with host egg storage in liquid nitrogen as a method of mass production of these egg parasitoids. eggs of nezara viridula (l.) and acrosternum pengue (rolston) were successfully parasitized by t. basalis, as ... | 2013 | 27023209 |
| feeding activity, salivary amylase activity, and superficial damage to soybean seed by adult edessa meditabunda (f.) and euschistus heros (f.) (hemiptera: pentatomidae). | 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 im ... | 2012 | 23950088 |
| behavioral comparisons of ingestion and excretion by selected species of pentatomids: evidence of feeding on different food sources supports pest status. | laboratory studies were conducted on food ingestion and excretion by selected species of pentatomids on different food sources to support their pest status. we compared the frequency and time of feeding on vegetative (stem) and reproductive (seed) structures of soybean, glycine max (l.) merrill and of maize, zea mays l. by piezodorus guildinii (westwood), dichelops melacanthus (dallas), and edessa meditabunda (f.); in addition, the amount of excreta (feces) produced were compared for d. melacant ... | 2016 | 27995590 |
| characterization of injury caused by edessa meditabunda (f.), chinavia impicticornis (stål), and piezodorus guildinii (west.) (hemiptera: pentatomidae) to soybean. | field cage trials were carried out in ponta grossa, paraná, season 2010/2011, aiming to characterize and evaluate the injury caused by edessa meditabunda (f.), chinavia impicticornis (stål), and piezodorus guildinii (west.) (hemiptera: pentatomidae) to soybean. non-infested plants were compared with infested plants with 2 and 3 adults/m (number of adult specimens per linear meter) at the r5.1-r9, r5.3-r9, r6-r9, and r7-r9 soybean growing stages. the following variables were analyzed: foliar rete ... | 2014 | 27193624 |
| first record of edessa meditabunda (f.) on lettuce in mato grosso state, brazil. | we report the first record of the stink bug edessa meditabunda (f.) on lettuce lactuca sativa in the organic vegetable garden "cheiro verde" in tangará da serra, state of mato grosso, brazil (14°37'13″ s, 57°28'46″ w). during september, october, and november 2009, we collected 1,099 adults, 43 nymphs, and 29 egg masses. feeding by this stink bug possibly caused early bolting. | 2012 | 23950014 |
| andropogon bicornis (poales, poaceae): a hibernation site for pentatomoidea (hemiptera: heteroptera) in a rice-growing region of southern brazil. | tussocks of andropogon bicornis (poaceae) make up a significant part of the landscape of the rice-growing region of south brazil. however, little is known about their role in maintaining insect diversity in anthropized regions. we tested the hypothesis that a. bicornis is a hibernation site for pentatomoidea (hemiptera: heteroptera) by analyzing the composition, structure, and diversity of pentatomoid assemblages over the course of a year. a total of 208 tussocks were removed at fortnightly inte ... | 2013 | 23949805 |
| male-produced sex pheromone of the stink bug edessa meditabunda. | edessa meditabunda is a secondary pest within the piercing-sucking stink bug complex that attacks soybean crops in brazil. the behavioral responses of males and females to aeration extracts from conspecifics suggested the presence of a male-produced sex pheromone. gas chromatographic (gc) analysis of male and female aeration extracts revealed the presence of two male-specific compounds in a ratio of 92:8. gas chromatographic -electroantennographic detection (gc-ead) assays indicated that the maj ... | 2012 | 22692411 |
| secondary metabolites from the phloem of piper solmsianum (piperaceae) in the honeydew of edessa meditabunda. | the phytochemistry of species of the genus piper has been studied extensively, including piper solmsianum. however, no studies have addressed the phytochemistry of the sap content of piper species. | 2013 | 22407565 |