A VIRUS DISEASE OF ECTROPIS CREPUSCULARIA SCHIFF. (GEOMETRIDAE: LEPIDOPTERA)

1967 ◽  
Vol 13 (7) ◽  
pp. 855-858 ◽  
Author(s):  
Oswald N. Morris
Keyword(s):  
Dna Synthesis ◽  
Deoxyribonucleic Acid ◽  
Nuclear Polyhedrosis Virus ◽  
Virus Disease ◽  
Disease Process ◽  
Virus Diseases ◽  
Virus Particles ◽  
Polyhedrosis Virus ◽  
Nuclear Polyhedrosis

The morphology of a nuclear polyhedrosis virus of Ectropis crepuscularia Schiff., the histopathology of the disease, and deoxyribonucleic acid (DNA) synthesis during the disease process were studied. The polyhedral inclusions measure 1.4 μ in diameter with a range of 0.8–2.1 μ. The virus particles are rods measuring 319 mμ by 79 mμ with a range of 280–360 mμ by 70–110 mμ. DNA labelling and nuclear swelling follow the course of previously described polyhedrosis virus diseases.

scholarly journals THE STRUCTURE OF INSECT VIRUS PARTICLES

1956 ◽  
Vol 2 (3) ◽  
pp. 301-306 ◽  
Author(s):  
Kenneth M. Smith
Keyword(s):  
Inclusion Bodies ◽  
Virus Disease ◽  
Composite Particles ◽  
Insect Virus ◽  
Virus Diseases ◽  
Thin Sections ◽  
Virus Particles ◽  
Nuclear Polyhedrosis

Thin sections have been cut of the virus particles from four types of insect virus diseases: cytoplasmic polyhedroses of lepidopterous larvae, a nuclear polyhedrosis of Tipula paludosa (Diptera), a granulosis from Melanchra persicariae (Lepidoptera), and a new virus disease without polyhedra from T. paludosa. The cytoplasmic polyhedral viruses are thought to have composite particles in some cases. The shape and enveloping membranes of the different virus particles are compared. In the new virus disease of T. paludosa some of the virus particles appear to be empty; inclusion bodies surrounded by complicated membranes are also demonstrated.

The Influence of a Virus Disease and Parasites on Spilonota ocellana in Apple Orchards

1966 ◽  
Vol 98 (10) ◽  
pp. 1035-1045 ◽  
Author(s):  
R. P. Jaques ◽  
H. T. Stultz
Keyword(s):  
Nova Scotia ◽  
Nuclear Polyhedrosis Virus ◽  
Virus Disease ◽  
Host Population ◽  
Apple Orchards ◽  
Late Instar ◽  
Polyhedrosis Virus ◽  
Nuclear Polyhedrosis ◽  
Favorable Conditions

AbstractA nuclear-polyhedrosis virus disease of Spilonota ocellana (Denis and Schiffermüller) is described. The disease was found in the majority of the Nova Scotia apple orchards sampled in a nine-year survey. Under favorable conditions the disease caused high mortalities but usually less than 10 per cent of a host population was killed by the virus.Agathis laticinctus (Cresson) killed an average of 25 per cent of late-instar larvae.

Transmission of Virus in Tent Caterpillar Populations

1966 ◽  
Vol 98 (10) ◽  
pp. 1100-1104 ◽  
Author(s):  
G. R. Stairs
Keyword(s):  
Nuclear Polyhedrosis Virus ◽  
Virus Disease ◽  
Malacosoma Disstria ◽  
Forest Tent Caterpillar ◽  
Larval Instars ◽  
Polyhedrosis Virus ◽  
Nuclear Polyhedrosis ◽  
Tent Caterpillar

AbstractThe transmission of nuclear polyhedrosis virus in populations of the forest tent caterpillar, Malacosoma disstria (Hübner), was studied in Sudbury district, Ontario. Virus was transmitted from generation to generation by infected adults. Their progeny died from virus disease during the second and third larval instars. Adult flies of Sarcophaga aldrichi Parker, a dipterous parasite, were attracted to these dead, diseased larvae, became contaminated with virus, and spread the virus to foliage on which healthy larvae were feeding. The importance of these disseminating agents in the development of virus epizootics is discussed.

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