Distribution of Natural Enemies of Euonymus Scale, Unaspis euonymi (Comstock), in Virginia

1995 ◽  
Vol 30 (2) ◽  
pp. 273-278 ◽  
Author(s):  
D. K. Jefferson ◽  
P. B. Schultz ◽  
M. D. Bryan
Keyword(s):  
Natural Enemies ◽  
Metropolitan Areas ◽  
Introduced Predators ◽  
Chilocorus Kuwanae ◽  
Euonymus Scale ◽  
Unaspis Euonymi

The colonization of Chilocorus kuwanae (Silvestri) (Coleoptera: Coccinellidae) and Cybocephalus nipponicus (Endrody-Younga) (Coleoptera: Nitidulidae), introduced predators of euonymus scale, Unaspis euonymi L., was evaluated on evergreen euonymus scale, Euonymus japonica L., by regional and statewide surveying. This study determined the statewide distribution of the native parasites of euonymus scale, Aspidiotiphagus spp. and Encarsia spp. (Hymenoptera: Aphelinidae). Highest recovery incidences were from 18 of the 41 survey sites on 25 May. The survey established the survival and dispersal of C. kuwanae in metropolitan areas of Virginia with recoveries in 8 of the 12 cities.

Distribution of Natural Enemies of Euonymus Scale,Unaspis euonymi(Comstock) (Homoptera: Diaspididae), in New Jersey

2003 ◽  
Vol 32 (3) ◽  
pp. 602-607 ◽  
Author(s):  
Deepak Matadha ◽  
George C. Hamilton ◽  
Marilyn G. Hughes ◽  
James H. Lashomb
Keyword(s):  
New Jersey ◽  
Natural Enemies ◽  
Euonymus Scale ◽  
Unaspis Euonymi

scholarly journals Suitability of Five Horticulturally Important Armored Scale Insects as Hosts for an Exotic Predaceous Lady Beetle1

1993 ◽  
Vol 11 (1) ◽  
pp. 28-30 ◽  
Author(s):  
Brenda C. Bull ◽  
Michael J. Raupp ◽  
Mark R. Hardin ◽  
Clifford S. Sadof
Keyword(s):  
Pupal Stage ◽  
The United States ◽  
Scale Insects ◽  
Armored Scale ◽  
Aspidiotus Nerii ◽  
Pseudaulacaspis Pentagona ◽  
Chilocorus Kuwanae ◽  
San Jose Scale ◽  
White Peach Scale ◽  
Euonymus Scale

Abstract Chilocorus kuwanae (Sylvestri) was imported from Korea to the United States for release against the euonymus scale (Unaspis euonymi (Comstock)). Field observations suggest that C. kuwanae feeds on a number of other armored scale insects, including white peach scale (Pseudaulacaspis pentagona (Targionni-Tozzeti)) and obscure scale (Melanaspis obscura (Comstock)). However, such observations have not been rigorously examined under controlled conditions. Our laboratory investigations indicate that C. kuwanae survives and reproduces well on San Jose scale (Quadraspidiotus perniciosus (Comstock)), in addition to euonymus scale. Fecundity was reduced in adults fed white peach scale. Few larvae survived to adulthood when fed oleander scale (Aspidiotus nerii (Bouche)). Adults failed to reproduce on obscure scale; none of the larvae fed this host survived to the pupal stage.

scholarly journals Differential Susceptibility of Six Euonymus Species and Cultivars to Euonymus Scale, Unaspis euonymi (Comstock)

1995 ◽  
Vol 13 (3) ◽  
pp. 140-142 ◽  
Author(s):  
David K. Jefferson ◽  
Peter B. Schultz
Keyword(s):  
Differential Susceptibility ◽  
Field Studies ◽  
Euonymus Scale ◽  
Euonymus Species ◽  
Unaspis Euonymi

Abstract The susceptibility of Euonymus species and cultivars to infestation by euonymus scale was studied in both field-grown and container plants. Significantly lower levels of euonymus scale were observed on Euonymus kiautschovicus ‘Manhattan’, E. japonicus, and E. fortunei in the field studies. In contrast, E. japonicus ‘Albo-marginatus’ and E. japonicus ‘Microphyllus’ had the highest infestation levels, indicating greatersusceptibility to euonymus scale. In container studies, E. japonicus ‘Albo-marginatus’ was the most susceptible of the species and cultivars; however, none of the remaining 5 differed significantly from one another

scholarly journals Occurrence of Euonymus scale Unaspis euonymi Comstock (Homoptera: Diaspididae) in the Semberia area

Biljni lekar ◽  
2020 ◽  
Vol 48 (2) ◽  
pp. 21-29
Author(s):  
Zorana Miladinović ◽  
Vojislav Trkulja
Keyword(s):  
Euonymus Scale ◽  
Unaspis Euonymi

EUONYMUS SCALE, UNASPIS EUONYMI (COMSTOCK) (HOMOPTERA: DIASPIDIDAE): EFFECTS OF HOST CULTIVAR AGE, AND LOCATION ON INFESTATION LEVELS1

1987 ◽  
Vol 22 (2) ◽  
pp. 119-122 ◽  
Author(s):  
B. S. Brewer ◽  
A. D. Oliver
Keyword(s):  
The Other ◽  
Euonymus Scale ◽  
Unaspis Euonymi

The euonymus scale, Unaspis euonymi (Comstock) infestation frequency was measured on 5 species and varieties of Euonymus. Euonymus japonica var. aureovariegata was infested more frequently than ‘Grandifolia’, var aureomarginata, cv ‘Silver King’, and cv ‘Silver Queen’. There were no differences in infestation rates among the other four cultivars. Plants located in “protected” environments had a significantly higher rate of infestation than plants located in “unprotected” environments. There were also significant differences (∞ = 0.05) in rate of infestation related to age of plants, with older plants being more heavily infested.

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