scholarly journals Phenology in the Native Range of Rhizaspidiotus donacis (Hemiptera: Diaspididae), a Biological Control Agent of Giant Reed in North America

2012 ◽  
Vol 105 (6) ◽  
pp. 865-871 ◽  
Author(s):  
E. Cortés ◽  
M. A. Marcos-García
Keyword(s):  
Biological Control ◽  
North America ◽  
Biological Control Agent ◽  
Control Agent ◽  
Giant Reed ◽  
Native Range

scholarly journals Biology of an Adventive Population of the Armored Scale Rhizaspidiotus donacis, a Biological Control Agent of Arundo donax in California

Insects ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 588
Author(s):  
Charles A. Braman ◽  
Adam M. Lambert ◽  
A. Zeynep Özsoy ◽  
Ellen N. Hollstien ◽  
Kirsten A. Sheehy ◽  
...  
Keyword(s):  
Biological Control ◽  
Biological Control Agent ◽  
Control Agent ◽  
Arundo Donax ◽  
Giant Reed ◽  
Aphytis Melinus ◽  
Adult Females ◽  
Armored Scale ◽  
Riparian Systems

Arundo donax (giant reed) is invasive in Mediterranean, sub-, and tropical riparian systems worldwide. The armored scale Rhizaspidiotus donacis is approved for biocontrol in North America, but an adventive population was recently discovered in southern California. We documented this population’s distribution, phylogeny, phenology, potential host spillover to Phragmites spp., and potential for parasitism by a common biocontrol parasitoid of citrus scale. The adventive scale was found within a single watershed and is genetically closest to Iberian scale genotypes. Rhizaspidiotus donacis developed on Phragmites haplotypes but at much lower densities than Arundo. The adventive population is univoltine, producing crawlers from March-June. Aphytis melinus parasitoids exhibited sustained interest in R. donacis during choice and no-choice trials and oviposition resulted in a small second generation. Rhizaspidiotus donacis appears limited in distribution by its univoltinism and sessile adult females. This presents challenges for broad biocontrol implementation but allows for targeted application. The genetic differentiation between imported biocontrol samples and adventive populations presents an opportunity for exploring benefits of hybrids and/or alternative genotypes where establishment has been difficult. While unlikely to occur in situ, spillover to vulnerable endemic Phragmites or deleterious parasitoid effects on scale biocontrol agents warrants consideration when planning use of R. donacis.

scholarly journals First Report of Phragmidium violaceum Infecting Himalaya and Evergreen Blackberries in North America

2005 ◽  
Vol 6 (1) ◽  
pp. 25 ◽  
Author(s):  
N. Osterbauer ◽  
A. Trippe ◽  
K. French ◽  
T. Butler ◽  
M. C. Aime ◽  
...  
Keyword(s):  
South Africa ◽  
Biological Control ◽  
New Zealand ◽  
North America ◽  
Biological Control Agent ◽  
Control Agent ◽  
First Report ◽  
Official Report

Phragmidium violaceum occurs on several species of Rubus, including R. armeniacus, R. fruticosus agg., and R. laciniatus, in Europe, South Africa, Iran, and Iraq, and has been introduced as a biological control agent for invasive blackberries in Australia, New Zealand, and Chile. To our knowledge, this is the first official report of P. violaceum infecting Himalaya and evergreen blackberries in North America. Accepted for publication 16 September 2005. Published 23 September 2005.

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