A NEW SQUASH BUG

1898 ◽  
Vol 30 (9) ◽  
pp. 239-240
Author(s):  
F. H. Chittenden
Keyword(s):  
District Of Columbia ◽  
Department Of Agriculture ◽  
Anasa Tristis ◽  
Squash Bug ◽  
Field Investigations ◽  
The Common ◽  
College Station ◽  
Official Work

In the course of an investigation of insects affecting cucurbits, begun in a preliminary way in the season of 1897, as a part of the official work of the Division of Entomology of the Department of Agriculture, it was found that we have in addition to the common squash bug, Anasa tristis, DeG., a second species sufficiently resembling it as to have readily escaped the notice of the average observer, but at the same time quite distinct in all its stages. This species is Anasa armigera, Say, and it was first observed on cucurbits by the writer July 12, near colonial Beach, Va., where it occured on cucumbers. Afterward it was taken by the writer and Mr. F. C. Pratt, of the Division of Entomology, who has assisted in field investigations and collections on different cucurbits, at Ballston, Va., Poolesville and Seat pleasant, Md., and on the Conduit Road and at Tenleytown, D. C. At the last mentioned place it occured in great abudance on a late crop of cucumbers and watermelons. As late as the 29th of September, all stages of the insect were found, including the egg. The present year the species was found to be nearly as abundant in some locaties as the common squash bug. Such was the case at Marshall Hall, Md., and in one locality in the District of columbia. It was also observed on squash at College Station and Kensington, Md., and on cucumber at Cabin John, Md.

scholarly journals PENGARUH KECERDASAN EMOSIONAL DAN MOTIVASI TERHADAP KINERJA PENYULUH DI DINAS PERTANIAN KABUPATEN TANGGAMUS

2017 ◽  
Vol 10 (2) ◽  
pp. 69
Author(s):  
Anna Gustina Zainal ◽  
Amiruddin Saleh
Keyword(s):  
Emotional Intelligence ◽  
Significant Influence ◽  
Multiple Linear Regression Model ◽  
Agricultural Extension ◽  
Test Results ◽  
Department Of Agriculture ◽  
Analysis Technique ◽  
Independent Variable ◽  
The Common ◽  
Dominant Influence

The most forward elements of the bureaucracy, dealing directly with farmers and spearheading the development of agriculture is the agricultural extension. Its presence is very important in determining the success of development activities of farmers. The purpose of this study to (1) determine the effect of emotional intelligence and motivational variables on the performance of agricultural extension; (2). determine the effect of emotional intelligence and motivation variable partially on the performance of agricultural extension (3). proving variables emotional intelligence has a dominant influence compared to the performance of agricultural extension motivation. The research is a kind of survey of the Department of Agriculture agricultural extension Tanggamus. The analysis technique used: multiple regression analysis to determine the effect of the independent variable (X) studied both together and partially to the dependent variable (Y). As for the multiple linear regression model should qualify the common assumptions of regression to test heteroscedasticity, autocorrelation and multicollinearity. Based on the analysis of F test proved that the independent variable in the form of emotional intelligence(X1),motivation (X2)has a significant influence on the performance variable (Y) so that the first hypothesis is accepted. While based on t test results proved that the X variable partially significant influence to variable Y so that the second hypothesis is accepted. The dominant independent variables affect the performance is not a variable motivational variables emotional intelligence so that the third hypothesis is rejected.

scholarly journals The importance of environmentally-acquired bacterial symbionts for the squash bug (Anasa tristis), a significant agricultural pest

2021 ◽  
Author(s):  
Tarik S. Acevedo ◽  
Gregory P. Fricker ◽  
Justine R Garcia ◽  
Tiffany Alcaide ◽  
Aileen Berasategui ◽  
...  
Keyword(s):  
Horizontal Transmission ◽  
Development Stage ◽  
Bacterial Symbionts ◽  
Complete Understanding ◽  
Anasa Tristis ◽  
Squash Bug ◽  
The Family ◽  
Insect Symbionts ◽  
Midgut Crypts ◽  
Bacterial Plant Pathogen

Most insects maintain associations with microbes that shape their ecology and evolution. Such symbioses have important applied implications when the associated insects are pests or vectors of disease. The squash bug, Anasa tristis (Coreoidea: Coreidae), is a significant pest of human agriculture in its own right and also causes damage to crops due to its capacity to transmit a bacterial plant pathogen. Here, we demonstrate that complete understanding of these insects requires consideration of their association with bacterial symbionts in the family Burkholderiaceae. Isolation and sequencing of bacteria housed in midgut crypts in these insects indicates that these bacteria are consistent and dominant members of the crypt-associated bacterial communities. These symbionts are closely related to Caballeronia spp. associated other true bugs in the superfamiles Lygaeoidea and Coreoidea. Fitness assays with representative Burkholderiaceae strains indicate that the association can significantly increase survival and decrease development time, though strains do vary in the benefits that they confer to their hosts, with Caballeronia spp. providing the greatest benefit. Experiments designed to assess transmission mode indicate that unlike many other beneficial insect symbionts, the bacteria are not acquired from parents before or after hatching but are instead acquired from the environment after molting to a later development stage. The bacteria do, however, have the capacity to escape adults to be transmitted to later generations, leaving the possibility for a combination of indirect vertical and horizontal transmission.

scholarly journals The Importance of Environmentally Acquired Bacterial Symbionts for the Squash Bug (Anasa tristis), a Significant Agricultural Pest

2021 ◽  
Vol 12 ◽  
Author(s):  
Tarik S. Acevedo ◽  
Gregory P. Fricker ◽  
Justine R. Garcia ◽  
Tiffanie Alcaide ◽  
Aileen Berasategui ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Horizontal Transmission ◽  
Bacterial Symbionts ◽  
Complete Understanding ◽  
Anasa Tristis ◽  
Squash Bug ◽  
The Family ◽  
Insect Symbionts ◽  
Midgut Crypts ◽  
Bacterial Plant Pathogen

Most insects maintain associations with microbes that shape their ecology and evolution. Such symbioses have important applied implications when the associated insects are pests or vectors of disease. The squash bug, Anasa tristis (Coreoidea: Coreidae), is a significant pest of human agriculture in its own right and also causes damage to crops due to its capacity to transmit a bacterial plant pathogen. Here, we demonstrate that complete understanding of these insects requires consideration of their association with bacterial symbionts in the family Burkholderiaceae. Isolation and sequencing of bacteria housed in the insects’ midgut crypts indicates that these bacteria are consistent and dominant members of the crypt-associated bacterial communities. These symbionts are closely related to Caballeronia spp. associated with other true bugs in the superfamilies Lygaeoidea and Coreoidea. Fitness assays with representative Burkholderiaceae strains indicate that the association can significantly increase survival and decrease development time, though strains do vary in the benefits that they confer to their hosts, with Caballeronia spp. providing the greatest benefit. Experiments designed to assess transmission mode indicate that, unlike many other beneficial insect symbionts, the bacteria are not acquired from parents before or after hatching but are instead acquired from the environment after molting to a later developmental stage. The bacteria do, however, have the capacity to escape adults to be transmitted to later generations, leaving the possibility for a combination of indirect vertical and horizontal transmission.

A cluster-based multiparametric similarity test for the compartmentalization of crystalline rocks into structural domains

2022 ◽  
pp. qjegh2021-136
Author(s):  
Attoumane Abi ◽  
Julien Walter ◽  
Ali Saeidi ◽  
Romain Chesnaux
Keyword(s):  
Rock Mass ◽  
Fractured Rocks ◽  
Crystalline Rocks ◽  
Fluid Circulation ◽  
Structural Domains ◽  
Fracture Spacing ◽  
Sampling Studies ◽  
Field Investigations ◽  
The Common ◽  
Similarity Method

Usually, fracture sampling studies comprise the collection of several fracture samples, which involve many fracture clusters. Grouping fracture samples into structural domains is generally useful for geologists, hydrogeologists, and geomechanicians as a region of fractured rocks is subdivided into sub-regions with similar behavior in terms of their hydromechanical properties. One of the common methods used for grouping fracture samples into structural domains considers the fracture orientation of clusters and ignores several fracture parameters, such as fracture spacing, aperture, and persistence, which are important for fluid circulation in the rock mass.In this study, we proposed a new cluster-based similarity method that considered the orientation of clusters as well as clusters’ aperture, persistence, and fracture spacing. Field investigations were conducted in the Grenville geological province of the Canadian Shield in the Lanaudière region, Quebec, Canada, where fractures were sampled from 30 outcrops and four boreholes. The proposed method is more suitable than other methods, and has applications in hydrogeology, rock mechanics, and especially in studies of fluid circulation in the rock mass. In addition, a method for the compartmentalization of a given study area into structural domains by means of Voronoi diagrams was also proposed.

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