scholarly journals The use οf νiruses for controlling pest species οf insects

2017 ◽  
Vol 4 ◽  
pp. 3
Author(s):  
N.F. Moore ◽  
T. Manousis
Keyword(s):  
Pest Species ◽  
Insect Virus ◽  
Virus Identification ◽  
Sufficient Detail ◽  
Field Control ◽  
Insect Viruses

Insect viruses have been used effectively to control pest species of insects. While viruses from several families have been used, members of the Baculoviridae have proven most successful. The successful viruses are mentioned and a brief introduc­tion into insect virus identification is followed by sufficient detail to differentiate between the major groups of viruses which have been used as field control agents. References are minimised to recent key articles on all the families of viruses found in insects.

scholarly journals Special Issue “Transmission Dynamics of Insect Viruses”

Viruses ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 644
Author(s):  
Kenneth A. Stapleford
Keyword(s):  
Transmission Dynamics ◽  
Special Issue ◽  
Insect Virus ◽  
Great Work ◽  
Virus Biology ◽  
Insect Viruses

At the close of this Special Issue of Viruses on the Transmission Dynamics of Insect Viruses, we would like to thank all of the authors for their submissions and the great work expanding our knowledge of insect virus biology and transmission [...]

STAGES IN THE DEVELOPMENT OF TWO INSECT VIRUSES

1954 ◽  
Vol 1 (3) ◽  
pp. 170-174 ◽  
Author(s):  
F. T. Bird ◽  
Mary M. Whalen
Keyword(s):  
Electron Micrographs ◽  
Free Virus ◽  
Insect Virus ◽  
Thin Sections ◽  
Virus Particles ◽  
Nuclear Membranes ◽  
Small Holes ◽  
Insect Viruses

Stages in the development of viruses of two Hymenopterous insects, Diprion hercyniae (Htg.) and Neodiprion americanus banksianae Roh., are shown in electron micrographs of thin sections. Following swelling of the nuclei and nucleoli and coagulation of the chromatin, rod-shaped virus particles appear chiefly on the exposed surfaces of the chromatin. The chromatin of D. hercyniae often coagulates into separate lumps that suggest small polyhedra. These first produce rod-shaped particles on their exposed surfaces and later transform into recognizable polyhedra. The chromatin of N. a. banksianae is more uniformly dispersed, and polyhedra arise as thickenings within the chromatin. In the latter insect, virus particles are frequently observed within the developing polyhedra, suggesting that polyhedra are formed by the accumulation of protein around groups of virus particles. Both polyhedra and free virus particles are larger and denser in the nuclear sap than in the chromatin. Their formation continues in remnants of chromatin in nuclei otherwise filled with large polyhedra. An incidental observation is that the nuclear membranes of some nuclei are pitted with small holes.

scholarly journals Field control and biology studies of a new pest species, Aethina tumida Murray (Coleoptera, Nitidulidae), attacking European honey bees in the Western Hemisphere

Apidologie ◽  
1999 ◽  
Vol 30 (5) ◽  
pp. 361-366 ◽  
Author(s):  
Patti J. Elzen ◽  
James R. Baxter ◽  
David Westervelt ◽  
Charlotte Randall ◽  
Keith S. Delaplane ◽  
...  
Keyword(s):  
Honey Bees ◽  
Western Hemisphere ◽  
Aethina Tumida ◽  
Pest Species ◽  
Field Control ◽  
New Pest

scholarly journals Insecticide resistance and control failure likelihood among populations of the boll weevil (Anthonomus grandis) from Mato Grosso (Brazil)

2019 ◽  
Vol 41 ◽  
pp. e42714 ◽  
Author(s):  
Sharrine Omari Domingues Oliveira-Marra ◽  
Raul Narciso Carvalho Guedes ◽  
Cristina Schetino Bastos ◽  
Pedro Henrique Alves Marra ◽  
Lucia Madalena Vivan ◽  
...  
Keyword(s):  
Insecticide Resistance ◽  
Boll Weevil ◽  
Anthonomus Grandis ◽  
Pest Species ◽  
Mato Grosso ◽  
Field Control ◽  
Control Failure ◽  
Insect Populations ◽  
And Control ◽  
Control Failures

The cotton producers from southern Mato Grosso are currently experiencing control failure with the use of the use of insecticides against the cotton boll weevil Anthonomus grandis Boheman, the main pest species of this commodity. Therefore, the present study was designed to survey insecticide resistance and the associated likelihood of control failure among boll weevil populations in the region. Ten insect populations were sampled during the 2016/2017 season and subjected to time-mortality (contact) bioassays in glass vials impregnated with dried insecticide residues at their respective label rates. The three insecticides most frequently used in the region were surveyed: the organophosphate malathion and the pyrethroids beta-cyfluthrin and zeta-cypermethrin. The survival curves showed estimates of the respective median survival time (LT50) for each combination of insecticide and insect copulation. However, there were no significant differences in susceptibility among populations. The estimates of control failure likelihood for each compound at their respective label rates also indicated negligible risk of control failure with their use. These findings are consistent with time-mortality results indicating the lack of insecticide resistant populations at the surveyed sampling sites, suggesting that the reported field control failures result from other causes such as problems with insecticide application.

Periodic Structure in the Matrix Protein of an Insect Virus

1982 ◽  
Vol 40 ◽  
pp. 302-303
Author(s):  
H.M. Mazzone ◽  
W.F. Engler ◽  
R. Zerillo ◽  
G.F. Bahr
Keyword(s):  
Inclusion Body ◽  
Periodic Structure ◽  
Matrix Protein ◽  
Malacosoma Disstria ◽  
Insect Virus ◽  
Virus Particles ◽  
The Matrix ◽  
Nucleopolyhedrosis Virus

The nucleopolyhedrosis virus (NPV) of the forest tent cater - pillar (Malacosoma disstria Hubner) has been analyzed in our laboratories. As a representative of the Baculovirus class, the NPV has virus particles enclosed with in a proteinaceous structure, the inclusion body.

Analysis of Dark-Field Images of Disordered Materials

1972 ◽  
Vol 30 ◽  
pp. 560-561
Author(s):  
J. M. Cowley
Keyword(s):  
Amorphous Materials ◽  
Careful Analysis ◽  
Dark Field ◽  
Minimum Diameter ◽  
Statistical Fluctuations ◽  
Bright Spots ◽  
Sufficient Detail ◽  
Random Arrangement ◽  
Diffraction Patterns ◽  
Imaging Conditions

Recently a number of authors have reported detail in dark-field images obtained from diffuse-scattering regions of electron diffraction patterns. Bright spots in images from short-range order diffuse peaks of disordered binary alloys have been interpreted as evidence for the existence of microdomains of ordered lattice or of segragated clusters of one component. Spotty contrast in dark field images of near-amorphous materials has been interpreted as evidence for the existense of microcrystals. Without a careful analysis of the imaging conditions such conclusions may be invalid. Usually the conditions of the experiment have not been specified in sufficient detail to allow evaluation of the conclusions.Elementary considerations show that even for a completely random arrangement of atoms the statistical fluctuations of density will give a spotty contrast with spots of minimum diameter determined by the dark field aperture size and other factors influencing the minimum resolvable distance under darkfield imaging conditions, including fluctuations and drift over long exposure times (resolution usually 10Å or more).

Control of Pest Species

1991 ◽  
Vol 9 (1) ◽  
pp. 49.3-50
Keyword(s):  
Pest Species
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