BENOMYL INHIBITION OF COTESIA (= APANTELES) MARGINIVENTRIS1 SURVIVAL IN FOUR LEPIDOPTEROUS HOSTS2

1985 ◽  
Vol 20 (1) ◽  
pp. 76-81 ◽  
Author(s):  
T. G. Teague ◽  
D. L. Horton ◽  
W. C. Yearian ◽  
J. R. Phillips
Keyword(s):  
Biological Control ◽  
Deleterious Effect ◽  
Spodoptera Exigua ◽  
Heliothis Zea ◽  
Pseudoplusia Includens ◽  
Synthetic Diet ◽  
Parasite Emergence

Four noctuid larvae, Heliothis zea (Boddie), Spodoptera exigua (Hubner), Pseudoplusia includens (Walker), and S. ornithogalli (Guenee) were reared on semi-synthetic diet in which varying concentrations of the carbamate fungicide benomyl were incorporated. These larvae were exposed to parasitization by Cotesia (= Apanteles) marginiventris (Cresson), and the effect of the fungicide on parasitism and host survival determined. Successful parasite emergence from H. zea, S. exigua, and P. includens was significantly reduced (P = 0.01) as benomyl concentration increased. Parasite emergence from S. ornithogalli was reduced, but a significantly significant dosage response was not evident. Implications of these findings, including a possible deleterious effect on natural biological control following benomyl application, are discussed.

Isozyme differentiation among three pathotypes of the entomogenous fungus Nomuraea rileyi

1981 ◽  
Vol 27 (3) ◽  
pp. 364-366 ◽  
Author(s):  
D. J. Joslyn ◽  
D. G. Boucias
Keyword(s):  
Host Specificity ◽  
Entomopathogenic Fungus ◽  
Heliothis Zea ◽  
Anticarsia Gemmatalis ◽  
Pseudoplusia Includens ◽  
Nomuraea Rileyi ◽  
Metabolic Function ◽  
Entomogenous Fungus ◽  
Fungal Isolates ◽  
Electrophoretic Data

The zymogram technique has been applied to three pathotypes of the entomopathogenic fungus Nomuraea rileyi. Isozyme profiles of isolates from Heliothis zea, Pseudoplusia includens, and Anticarsia gemmatalis were compared for 17 enzymes of known metabolic function. Electrophoretic data supported the taxonomic differences inferred for the three pathotypes based on host specificity. The isolate from A. gemmatalis was found consistently to be the most distinct.This study demonstrates that isozyme analysis may be used to distinguish closely related fungal isolates of N. rileyi.

Can mixtures of horizontally and vertically transmitted nucleopolyhedrovirus genotypes be effective for biological control of Spodoptera exigua?

2016 ◽  
Vol 90 (1) ◽  
pp. 331-343 ◽  
Author(s):  
Cristina Virto ◽  
Trevor Williams ◽  
David Navarro ◽  
M. Mar Tellez ◽  
Rosa Murillo ◽  
...  
Keyword(s):  
Biological Control ◽  
Spodoptera Exigua

A new multistage dynamic model for biological control exemplified by the host–parasitoid system Spodoptera exigua–Chelonus oculator

2014 ◽  
Vol 88 (2) ◽  
pp. 343-358 ◽  
Author(s):  
József Garay ◽  
Zoltán Sebestyén ◽  
Zoltán Varga ◽  
Manuel Gámez ◽  
Alejandro Torres ◽  
...  
Keyword(s):  
Biological Control ◽  
Dynamic Model ◽  
Spodoptera Exigua ◽  
Chelonus Oculator

Biological Control of Beet Armyworm, Spodoptera exigua, with Baculoviruses in Greenhouses: Development of a Comprehensive Process-Based Model

2002 ◽  
Vol 23 (1) ◽  
pp. 35-46 ◽  
Author(s):  
Felix J.J.A. Bianchi ◽  
Just M. Vlak ◽  
Rudy Rabbinge ◽  
Wopke Van der Werf
Keyword(s):  
Biological Control ◽  
Spodoptera Exigua ◽  
Beet Armyworm

Electron investigations of rhabdovirus-like particles in mexican bean beetles and crickets

1978 ◽  
Vol 36 (2) ◽  
pp. 378-379
Author(s):  
J. R. Adams ◽  
G. J Tompkins ◽  
A. M. Heimpel ◽  
E. Dougherty
Keyword(s):  
Biological Control ◽  
Integrated Pest Management ◽  
Pest Management ◽  
Developmental Stages ◽  
Management Program ◽  
Acheta Domesticus ◽  
Epilachna Varivestis ◽  
House Cricket ◽  
Similar Morphology ◽  
Bean Beetle

As part of a continual search for potential pathogens of insects for use in biological control or on an integrated pest management program, two bacilliform virus-like particles (VLP) of similar morphology have been found in the Mexican bean beetle Epilachna varivestis Mulsant and the house cricket, Acheta domesticus (L. ).Tissues of diseased larvae and adults of E. varivestis and all developmental stages of A. domesticus were fixed according to procedures previously described. While the bean beetles displayed no external symptoms, the diseased crickets displayed a twitching and shaking of the metathoracic legs and a lowered rate of activity.Examinations of larvae and adult Mexican bean beetles collected in the field in 1976 and 1977 in Maryland and field collected specimens brought into the lab in the fall and reared through several generations revealed that specimens from each collection contained vesicles in the cytoplasm of the midgut filled with hundreds of these VLP's which were enveloped and measured approximately 16-25 nm x 55-110 nm, the shorter VLP's generally having the greater width (Fig. 1).

Ultrastructural investigation of an adenoma of the pituitary post mortem

1987 ◽  
Vol 45 ◽  
pp. 622-623
Author(s):  
Shirley Siew ◽  
W. C. deMendonca
Keyword(s):  
Deleterious Effect ◽  
Anterior Lobe ◽  
Definitive Diagnosis ◽  
Pars Intermedia ◽  
Post Mortem ◽  
Close Apposition ◽  
Autopsy Material ◽  
Progressive Loss ◽  
Transmission Electron ◽  
Means Of Transmission

The deleterious effect of post mortem degeneration results in a progressive loss of ultrastructural detail. This had led to reluctance (if not refusal) to examine autopsy material by means of transmission electron microscopy. Nevertheless, Johannesen has drawn attention to the fact that a sufficient amount of significant features may be preserved in order to enable the establishment of a definitive diagnosis, even on “graveyard” tissue.Routine histopathology of the autopsy organs of a woman of 78 showed the presence of a well circumscribed adenoma in the anterior lobe of the pituitary. The lesion came into close apposition to the pars intermedia. Its architecture was more compact and less vascular than that of the anterior lobe. However, there was some grouping of the cells in relation to blood vessels. The cells tended to be smaller, with a higher nucleocytoplasmic ratio. The cytoplasm showed a paucity of granules. In some of the cells, it was eosinophilic.

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