Relative Abundance of the Stink Bug (Hemiptera: Pentatomidae) Complex Infesting Rice in the Everglades Agricultural Area of Florida

2020 ◽  
Vol 113 (3) ◽  
pp. 1582-1585
Author(s):  
Matthew T VanWeelden ◽  
Ronald H Cherry ◽  
Michael Karounos
Keyword(s):  
Relative Abundance ◽  
Abundant Species ◽  
The United States ◽  
Rice Fields ◽  
Agricultural Area ◽  
Stink Bug ◽  
Everglades Agricultural Area ◽  
Oebalus Pugnax ◽  
Panicum Dichotomiflorum ◽  
Growing Region

Abstract Florida’s rice stink bug complex comprises three species; Oebalus pugnax (F.), O. insularis (Stal), and O. ypsilongriseus (DeGeer), the latter two of which are invasive and exclusive to Florida within the United States. A series of surveys were conducted in 2017 and 2018 to determine the relative abundance of the three species throughout Florida’s rice growing region within the Everglades Agricultural Area, in addition to comparing their seasonality within crop and noncrop habitats. Sampling occurred in commercial rice fields and adjacent transects of graminaceous noncrop hosts using sweep nets. Oebalus pugnax (52.7%) and O. insularis (61.7%) were the most abundant species in 2017 and 2018, respectively. Both species were more prevalent in rice fields compared to transects of noncrop hosts. Oebalus ypsilongriseus remained in low abundance relative to O. pugnax and O. insularis, and did not differ in numbers collected among rice and noncrop hosts. Of the noncrop hosts in transects, Panicum dichotomiflorum (fall panicum) was the most abundant across both years. This study is the first report of Oebalus species feeding on Echinochloa crus-galli (common barnyardgrass) in Florida. This study shows that the invasive O. insularis continues to increase in abundance, and has surpassed O. pugnax in terms of regional populations. These results emphasize the need for additional studies to assess the interactions among O. insularis and other Oebalus species in addition to its feeding behavior in Florida rice.

Relative Abundance of Stink bugs (Hemiptera: Pentatomidae) in Southwestern Colombia Rice Fields

1995 ◽  
Vol 30 (4) ◽  
pp. 463-467 ◽  
Author(s):  
Alberto Pantoja ◽  
Eugenia Daza ◽  
César Garcia ◽  
Olga I. Mejía ◽  
Dave A. Rider
Keyword(s):  
Latin America ◽  
Relative Abundance ◽  
Abundant Species ◽  
Rice Fields ◽  
Geographical Range ◽  
Stink Bug ◽  
Stink Bugs ◽  
Valle Del Cauca ◽  
Latin America Countries

Relative abundance of stink bugs was determined from 01 May 1989 to 30 September 1992 in 80 commercial rice fields in Colombia and in 12 selected rice-producing countries of Latin America. Fifteen stink bug species from nine genera were found in Colombia. The species are Oebalus ornatus (Sailer), Mormidea maculata Dallas, Tribraca obscurata Bergroth, M. pictiventris Stål, O. pugnax torridus (Sailer), Proxys punctulatus (Palisot de Beauvois), O. insularis (Stål), T. limbativentris Stål, and O. ypsilongriseus (De Greer). In Valle del Cauca Department in southwestern Colombia, the most abundant species was O. ornatus representing 94.1% of the stink bugs collected. Seven species comprised the remaining 5.9%. Oebalus ornatus and O. ypsilongriseus were recovered from seven Latin America countries and had the widest geographical range of the stink bugs species collected during the study.

Effect of Weeds on Rice Stink Bug (Hemiptera: Pentatomidae) Populations in Florida Rice Fields

2005 ◽  
Vol 40 (4) ◽  
pp. 378-384 ◽  
Author(s):  
Ron Cherry ◽  
Andy Bennett
Keyword(s):  
Weed Control ◽  
Rice Fields ◽  
Stink Bug ◽  
Stink Bugs ◽  
Large Numbers ◽  
Oebalus Pugnax ◽  
Panicum Dichotomiflorum ◽  
Rice Stink Bug

The effect of weeds on rice stink bug, Oebalus pugnax (F.), populations was studied in Florida rice fields. Fall panicum, Panicum dichotomiflorum Michaux, was the most common grassy weed found in weedy areas of rice fields, and significantly more rice stink bugs were found in these weedy areas vs nonweedy areas in the fields. Large numbers of rice stink bugs also were found in unmowed roadsides containing heading weeds, especially coast cockspur, Echinochloa walteri (Pursh) Heller. In contrast, few rice stink bugs were found in mowed roadsides which prevented weed heading around rice fields. Our study shows that weed control helps reduce rice stink bug populations in Florida rice.

Reexamination of the Influence of Oebalus pugnax (Hemiptera: Pentatomidae) Infestations on Rice Yield and Quality

2020 ◽  
Vol 113 (3) ◽  
pp. 1248-1253
Author(s):  
Blake E Wilson ◽  
Michael J Stout
Keyword(s):  
Rice Yield ◽  
Oryza Sativa L ◽  
The United States ◽  
Quality Parameters ◽  
Stink Bug ◽  
Yield And Quality ◽  
Oebalus Pugnax ◽  
The Impact ◽  
Sweep Net ◽  
Panicle Weight

Abstract The rice stink bug, Oebalus pugnax (F.), is the most important pest of headed rice, Oryza sativa L., in the United States. Numerous studies have attempted to quantify the impact of O. pugnax feeding on rice yield and grain quality, but these studies have often produced conflicting results. Across mid-south U.S. rice, thresholds based on sweep net sampling are used to determine the need for insecticide applications, but few studies have related sweep net captures to rice quality parameters. Field trials were conducted in Louisiana in 2015 and 2016 that used different rates of insecticides to establish rice plots with mean O. pugnax infestations ranging from 0.8 to 24.6 insects per 10 sweeps. Insecticide applications improved panicle weight and head yields as well as decreased percentage peck. A series of linear regressions examined relationships between O. pugnax captures and rice yield and quality parameters, including panicle weight, head yield (% whole kernels), and peck (discolored grains). Mean O. pugnax sweep net captures across all sampling dates in both years were significantly and negatively correlated to panicle weight and head yield and positively correlated to percentage peck. Peck was negatively correlated with head yield. Results from sampling at different maturity stages indicate sweep net captures at grain fill and soft dough stages had the greatest influence on rice yield and quality parameters, respectively. Further research into impacts of milling quality reductions on farm revenue and the influence of cumulative infestations over grain development is needed to improve economic thresholds for O. pugnax in rice.

DISTRIBUTION AND ABUNDANCE OF LYGUS SPP. (HETEROPTERA: MIRIDAE) ON ALFALFA AND CANOLA IN MANITOBAf

1993 ◽  
Vol 125 (6) ◽  
pp. 1033-1041 ◽  
Author(s):  
B.H. Timlick ◽  
W.J. Turnock ◽  
I. Wise
Keyword(s):  
Relative Abundance ◽  
First Generation ◽  
Second Generation ◽  
Abundant Species ◽  
Agricultural Area ◽  
Lygus Lineolaris ◽  
The South ◽  
The North ◽  
Physiographic Regions

AbstractLygus species were sampled from alfalfa and canola fields in Manitoba from 1988 to 1990. Lygus lineolaris (Palisot de Beauvois), L. borealis (Knight), and L. elisus (Van Duzee) were found consistently throughout the agricultural area. The relative abundance of these species varied among crops, physiographic regions, years, and date of collection. The most abundant species in alfalfa and canola fields tended to be L. borealis in the north and west, L. elisus in the south, and L. lineolaris in the east. Each of the species was the most abundant in some collections, however L. borealis tended to be more abundant in alfalfa and L. lineolaris and L. elisus in canola. First-generation nymphs of Lygus species were found on alfalfa and those of the second generation on canola.

Stink Bugs in Florida Rice

EDIS ◽  
2013 ◽  
Vol 2013 (11) ◽  
Author(s):  
Ron Cherry
Keyword(s):  
United States ◽  
Dominant Species ◽  
The United States ◽  
Rice Production ◽  
Rice Fields ◽  
Stink Bug ◽  
Stink Bugs ◽  
First Report ◽  
Important Pest ◽  
Species Being

Although many different insects can be found in rice fields in Florida, stink bugs are currently considered the most important pest. Jones and Cherry reported that the rice stink bug was the dominant species, comprising more than 95% of the total stink bug population. Cherry et al. (1998) reported that the stink bug Oebalus ypsilongriseus was widespread in Florida rice fields. This was the first report of this species being found in commercial rice fields in the United States. Cherry and Nuessly (2010) reported that the stink bug Oebalus insularis is now widespread in Florida rice fields. This was the first report of this species being found in commercial rice fields in the United States. The stink bug complex attacking Florida rice is the most diversified and unique stink bug complex in US rice production. This 4-page fact sheet was written by Ron Cherry, and published by the UF Department of Entomology and Nematology, October 2013. http://edis.ifas.ufl.edu/in1009

scholarly journals Epidemic West Nile Virus Infection Rates and Endemic Population Dynamics Among South Dakota Mosquitoes: A 15-yr Study from the United States Northern Great Plains

2019 ◽  
Vol 57 (3) ◽  
pp. 862-871
Author(s):  
Geoffrey P Vincent ◽  
Justin K Davis ◽  
Matthew J Wittry ◽  
Michael C Wimberly ◽  
Chris D Carlson ◽  
...  
Keyword(s):  
United States ◽  
West Nile Virus ◽  
South Dakota ◽  
Relative Abundance ◽  
Mosquito Species ◽  
Abundant Species ◽  
The United States ◽  
Northern Great Plains ◽  
Infection Rates ◽  
West Nile

Abstract Mosquito surveillance has been conducted across South Dakota (SD) to record and track potential West Nile virus (WNV) vectors since 2004. During this time, communities from 29 counties collected nearly 5.5 million mosquitoes, providing data from over 60,000 unique trapping nights. The nuisance mosquito, Aedes vexans (Meigen) was the most abundant species in the state (39.9%), and most abundant in most regions. The WNV vector, Culex tarsalis Coquillett (Diptera: Culicidae), was the second most abundant species (20.5%), and 26 times more abundant than the other Culex species that also transmit WNV. However, geographic variation did exist between WNV vector species, as well as relative abundance of vector and nuisance mosquitoes. The abundance of Ae. vexans decreased from east to west in South Dakota, resulting in an increase in the relative abundance of Cx. tarsalis. Other species are reported in this study, with various relative abundances throughout the different regions of South Dakota. WNV infection rates of mosquitoes showed that Cx. tarsalis had the most positive sampling pools and the highest vector index of all the species tested. This study addressed the need for an updated summary of the predominant mosquito species present in the United States Northern Great Plain and provides infection rate data for WNV among these predominant species.

scholarly journals Trouble in Paradise? A comparison of 1953 and 2005 benthonic foraminiferal seafloor assemblages at the Ibis Field, offshore eastern Trinidad, West Indies

2006 ◽  
Vol 25 (2) ◽  
pp. 157-164 ◽  
Author(s):  
Brent Wilson
Keyword(s):  
Relative Abundance ◽  
Nutrient Enrichment ◽  
Abundant Species ◽  
Nutrient Supply ◽  
South American ◽  
Sufficient Time ◽  
Phytoplankton Primary Production ◽  
Environmental Perturbations ◽  
Run Off ◽  
Shrimp Farms

Abstract. Foraminiferal communities are not static, but change in response to environmental perturbations. Given sufficient time, the change will be recorded in the total (live+dead) seafloor assemblage, from which valuable information regarding environmental trends can be obtained by re-sampling assemblages at the decadal scale.The seafloor assemblage in the 5 km × 6 km Ibis Field, off southeast Trinidad, first surveyed in 1953, was re-examined in 2005. The fauna had changed markedly between the surveys. Overall increases in the proportional abundances of Uvigerina subperegrina, Ammonia pauciloculata/Rolhausenia rolhauseni and Pseudononion atlanticum indicate an increase in nutrient supply that apparently killed off Cibicidoides pseudoungerianus and Miliolinella subrotunda, and reduced the relative abundance of Hanzawaia concentrica, but did not affect the relative abundance of Cancris sagrai. As shown by similar 1953 and 2005 planktonic/benthonic foraminiferal ratios, the increased nutrient supply impacted on both surface and bottom waters.Of the six most abundant species in 2005, five showed the same general biogeographical distributions within the field in 1953 and 2005. However, whereas the proportional abundance of Uvigerina subperegrina in 1953 increased southwards, in 2005 it increased northwards.Trinidad cannot be the source for the nutrient enrichment: the island lies down-current from the Ibis Field. Sources must therefore be sought up-current and to the southeast, in the Amazon, Essequibo and Orinoco river basins, or along the South American shoreline. It is speculated that the nutrient enrichment may be a consequence of increased phytoplankton primary production associated with nitrogen-rich run-off from South American sugarcane plantations, or from flushing of organic carbon from poorly regulated sewage systems or shrimp farms in South America.

Effect of fire regime on the grass community of the humid savanna of Lamto, Ivory Coast

2018 ◽  
Vol 35 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Kouamé Fulgence Koffi ◽  
Aya Brigitte N’Dri ◽  
Jean-Christophe Lata ◽  
Souleymane Konaté ◽  
Tharaniya Srikanthasamy ◽  
...  
Keyword(s):  
Relative Abundance ◽  
Ivory Coast ◽  
Fire Regime ◽  
Fire Regimes ◽  
Abundant Species ◽  
Grass Species ◽  
The Third ◽  
Humid Savanna ◽  
The Impact ◽  
Tussock Grasses

AbstractThis study assesses the impact of four fire treatments applied yearly over 3 y, i.e. early fire, mid-season fire, late fire and no fire treatments, on the grass communities of Lamto savanna, Ivory Coast. We describe communities of perennial tussock grasses on three replicated 5 × 5-m or 10 × 5-m plots of each fire treatment. Tussock density did not vary with fire treatment. The relative abundance of grass species, the circumference of grass tussocks and the probability of having a tussock with a central die-back, varied with fire treatment. Mid-season fire had the highest proportion of tussocks with a central die-back while the late fire had the smallest tussocks. Tussock density, circumference, relative abundance and probability of having a central die-back varied with species. Andropogon canaliculatus and Hyparrhenia diplandra were the most abundant of the nine grass species. They had the largest tussocks and the highest proportion of tussock with a central die-back. Loudetia simplex was the third most abundant species but was very rare in no fire plots. The distribution of tussock circumferences was right skewed and dominated by small tussocks. The proportion of the tussocks with a central die-back strongly increased with circumference, which could lead to tussock fragmentation. Taken together, this study suggests that fire regimes impact grass demography and that this impact depends on grass species and tussock size.

scholarly journals Mejores Prácticas de Manejo en el Area Agrícola de los Everglades: Controlando el Fósforo en Partícula y Sedimentos en Canales

EDIS ◽  
2007 ◽  
Vol 2007 (17) ◽  
Author(s):  
Orlando A. Diaz ◽  
Timothy A. Lang ◽  
Samira H. Daroub ◽  
Viviana M. Nadal
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Spanish Language ◽  
Agricultural Area ◽  
Particulate Phosphorus ◽  
Sediment Control ◽  
Language Version ◽  
Everglades Agricultural Area ◽  
Best Management ◽  
Improve Water Quality

SL-228-Sp, a 9-page illustrated fact sheet by O.A. Diaz, T.A. Lang, S.H. Daroub, and V.M. Nadal, is the Spanish language version of "SL228/SS448: Best Management Practices in the Everglades Agricultural Area: Controlling Particulate Phosphorus and Canal Sediments." It explains and discusses particulate P and sediment control practices, which serve as important tools in efforts to improve water quality in the basin. This EDIS article is one in a series that attempts to explain in easily understandable terms the implementation methods and rationale behind the main P load reducing BMPs employed on EAA farms. Published by the UF Department of Soil and Water Sciences, August 2007. SL228SP/SS476: Mejores Prácticas de Manejo en el Area Agrícola de los Everglades: Controlando el Fósforo en Partícula y Sedimentos en Canales (ufl.edu) Ask IFAS: Best Management Practices in the Everglades Agricultural Area series (en espanol) (ufl.edu)

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