Seasonality and Movement of Adventive Populations of the Arundo Wasp (Hymenoptera: Eurytomidae), a Biological Control Agent of Giant Reed in the Lower Rio Grande Basin in South Texas

2009 ◽  
Vol 34 (4) ◽  
pp. 347-357 ◽  
Author(s):  
Alexis E. Racelis ◽  
John A. Goolsby ◽  
Patrick Moran
Keyword(s):  
Biological Control ◽  
Biological Control Agent ◽  
Rio Grande ◽  
Control Agent ◽  
South Texas ◽  
Giant Reed ◽  
Rio Grande Basin ◽  
Lower Rio Grande

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 Occurrence of Lysiphlebus testaceipes parasitizing Aphis gossypii in watermelon in the State of Rio Grande do Norte, Brazil

2010 ◽  
Vol 40 (9) ◽  
pp. 2030-2032 ◽  
Author(s):  
Luciano Pacelli Medeiros Macedo ◽  
Edmondson Reginaldo Moura Filho ◽  
Adriano Soares Carvalho ◽  
Carlos Eduardo Souza Bezerra ◽  
Luís Cláudio Paterno Silveira
Keyword(s):  
Biological Control ◽  
Biological Control Agent ◽  
Integrated Management ◽  
Aphis Gossypii ◽  
Rio Grande ◽  
Control Agent ◽  
The State ◽  
Lysiphlebus Testaceipes ◽  
Aphis Gossypii Glover ◽  
Almost All

This is the first report of the parasitoid Lysiphlebus testaceipes (Cresson) as a biological control agent of the aphid Aphis gossypii Glover in watermelon crop in Vale do Açu, RN. It was observed that near the harvest, almost all collected aphids were mummified, and after analyzing the emerged parasitoids, the parasitoid L. testaceipes was identified. Therefore, in the future, this species may be included in A. gossypii integrated management programs.

scholarly journals LEVANTAMENTO DA DISPERSÃO E VARIABILIDADE GENÉTICA DE Tectococcus ovatus (HETEROPTERA: ERIOCOCCIDAE) NAS REGIÕES DE OCORRÊNCIA NATURAL DE Psidium cattleianum (MYRTACEAE)

FLORESTA ◽  
2013 ◽  
Vol 43 (2) ◽  
pp. 289
Author(s):  
Luciene Erica Cordeiro Ranuci ◽  
Josiane de Carvalho Vitorino ◽  
Tracy Johnson ◽  
Marcelo Diniz Vitorino
Keyword(s):  
Biological Control ◽  
Genetic Variability ◽  
Rio De Janeiro ◽  
Biological Control Agent ◽  
Rio Grande ◽  
Control Agent ◽  
Rio Grande Do Sul ◽  
Santa Catarina ◽  
Psidium Cattleianum ◽  
Different Populations

 A espécie Psidium cattleianum é considerada uma das maiores ameaças ao ecossistema e à biodiversidade nas ilhas do Havaí. Buscando controlar sua disseminação, adotaram-se técnicas de controle biológico. Dentre as várias espécies estudadas como agente de controle, Tectococcus ovatus (Heteroptera: Eriococcidae) apresentou o maior nível de especificidade. Este trabalho teve como objetivo verificar a existência de variabilidade genética entre e dentro das diferentes populações de Tectococcus ovatus amostradas, utilizando a técnica de PCR-RAPD. As análises foram realizadas a partir de fêmeas coletadas nos estados do Rio de Janeiro, Paraná, Santa Catarina e Rio Grande do Sul. Dos oito iniciadores de PCR-RAPD testados, quatro foram utilizados nas análises, revelando marcadores monomórficos e polimórficos com uma freqüência variável, tanto para os indivíduos de uma mesma localidade quanto para os indivíduos de localidades diferentes. Através da análise de agrupamento de caracterização molecular, foi possível verificar a formação de dois grupos distintos, A e B, apresentando uma variabilidade genética de 44%. Os resultados obtidos através da análise dos marcadores RAPD foram úteis na verificação de variação e forneceram informações sobre os níveis de variabilidade e similaridade entre e dentro das diferentes populações de Tectococcus ovatus.Palavras-chave:  Controle biológico; variabilidade genética; PCR-RAPD. AbstractSurvey of dispersal and genetic variability of Tectococcus ovatus (Heteroptera: Eriococcidae) in the regions of natural occurence of Psidium cattleianum (Myrtaceae). The species Psidium cattleianum is considered one of the greatest threats to the ecosystem and biodiversity of the islands from Hawaii. Seeking to control its dissemination, techniques of biological control were used. Among the various species studied, as a biological control agent, Tectococcus ovatus showed a higher level of specificity. This work had as its aim to verify the existence of genetic variability among and inside different populations of Tectococcus ovatus sampled, using the technique of PCR-RAPD. The analyses were made from females collected in the states of Rio de Janeiro, Paraná, Santa Catarina and Rio Grande do Sul. From the eight initiators of PCR-RAPD tested, four were used in the analyses, revealing monomorphic and polimorphic markers with a variable frequency, to the individuals of one place as well as to the individuals of different places. Through the analysis of the grouping of molecular characterization it was possible to verify a formation of two distinctive groups A and B, presenting a genetic variability of 44%. The results obtained through the analysis of RAPD markers were useful to variation verification and provided safe information about the levels of variability and similarity amongst and inside the different populations of Tectococcus ovatus.Keywords:  Biological control; genetic variability; PCR-RAPD.

Biology, ecology, and impact of Cryptonevra nigritarsis Duda, a potential biological control agent against the giant reed Arundo donax

2020 ◽  
Vol 147 ◽  
pp. 104287
Author(s):  
Yaël Escobar ◽  
Fatiha Guermache ◽  
Marie-Claude Bon ◽  
Elven Kerdellant ◽  
Louis Petoux ◽  
...  
Keyword(s):  
Biological Control ◽  
Biological Control Agent ◽  
Control Agent ◽  
Arundo Donax ◽  
Giant Reed
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