Host specificity of the rubber vine moth, Euclasta whalleyi Popescu-Gorj and Constantinescu (Lepidoptera: Crambidae: Pyraustinae): field host-range compared to that predicted by laboratory tests

2002 ◽  
Vol 41 (4) ◽  
pp. 321-323 ◽  
Author(s):  
Rachel E Cruttwell McFadyen ◽  
Marie Vitelli ◽  
Catherine Setter
Keyword(s):  
Host Range ◽  
Host Specificity ◽  
Laboratory Tests ◽  
Euclasta Whalleyi

scholarly journals Trissolcus kozlovi in North Italy: Host Specificity and Augmentative Releases against Halyomorpha halys in Hazelnut Orchards

Insects ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 464
Author(s):  
Silvia Teresa Moraglio ◽  
Francesco Tortorici ◽  
Sara Visentin ◽  
Marco Giuseppe Pansa ◽  
Luciana Tavella
Keyword(s):  
Host Range ◽  
Host Specificity ◽  
Environmental Conditions ◽  
Laboratory Tests ◽  
Biological Traits ◽  
Halyomorpha Halys ◽  
New Host ◽  
Augmentative Releases ◽  
Few Data ◽  
High Adaptation

Trissolcus kozlovi (Hymenoptera: Scelionidae) emerged from field-laid eggs of Halyomorpha halys (Hemiptera: Pentatomidae) in North Italy, and it emerged in significantly higher numbers from fresh H. halys eggs compared to other native scelionids. Since few data on T. kozlovi are available, its host-specificity and some biological traits were investigated in laboratory tests, and its impact after augmentative releases was evaluated in two hazelnut orchards. Among the 12 tested bug species (Hemiptera: Pentatomidae, Scutelleridae), only Nezara viridula was an unsuitable host, while the highest offspring proportions were obtained from Arma custos, Pentatoma rufipes, and Peribalus strictus, followed by Acrosternum heegeri and Palomena prasina. Furthermore, when reared on P. strictus, T. kozlovi showed a high longevity as well as a high adaptation to H. halys eggs. In both hazelnut orchards, T. kozlovi emerged from H. halys eggs after field releases, but it was not found in the next two years. The physiological host range of T. kozlovi was quite similar to that of T. japonicus, and probably T. kozlovi has just begun to attack H. halys as a new host. This aspect needs to be further investigated, as well as its favorable environmental conditions, its distribution and also its possible interaction with T. japonicus, currently present in Italy.

scholarly journals A Draft Genome Sequence of Pseudomonas syringae pv. tomato T1 Reveals a Type III Effector Repertoire Significantly Divergent from That of Pseudomonas syringae pv. tomato DC3000

2009 ◽  
Vol 22 (1) ◽  
pp. 52-62 ◽  
Author(s):  
Nalvo F. Almeida ◽  
Shuangchun Yan ◽  
Magdalen Lindeberg ◽  
David J. Studholme ◽  
David J. Schneider ◽  
...  
Keyword(s):  
Host Range ◽  
Host Specificity ◽  
Pseudomonas Syringae ◽  
Genome Sequence ◽  
Draft Genome ◽  
Draft Genome Sequence ◽  
Tomato Dc3000 ◽  
Type Iii ◽  
Host Range Determination ◽  
Range Determination

Diverse gene products including phytotoxins, pathogen-associated molecular patterns, and type III secreted effectors influence interactions between Pseudomonas syringae strains and plants, with additional yet uncharacterized factors likely contributing as well. Of particular interest are those interactions governing pathogen-host specificity. Comparative genomics of closely related pathogens with different host specificity represents an excellent approach for identification of genes contributing to host-range determination. A draft genome sequence of Pseudomonas syringae pv. tomato T1, which is pathogenic on tomato but nonpathogenic on Arabidopsis thaliana, was obtained for this purpose and compared with the genome of the closely related A. thaliana and tomato model pathogen P. syringae pv. tomato DC3000. Although the overall genetic content of each of the two genomes appears to be highly similar, the repertoire of effectors was found to diverge significantly. Several P. syringae pv. tomato T1 effectors absent from strain DC3000 were confirmed to be translocated into plants, with the well-studied effector AvrRpt2 representing a likely candidate for host-range determination. However, the presence of avrRpt2 was not found sufficient to explain A. thaliana resistance to P. syringae pv. tomato T1, suggesting that other effectors and possibly type III secretion system–independent factors also play a role in this interaction.

Ecological release in lizard endoparasites from the Atlantic Forest, northeast of the Neotropical Region

Parasitology ◽  
2020 ◽  
Vol 147 (4) ◽  
pp. 491-500
Author(s):  
Adonias A. Martins Teixeira ◽  
Pablo Riul ◽  
Samuel Vieira Brito ◽  
João A. Araujo-Filho ◽  
Diêgo Alves Teles ◽  
...  
Keyword(s):  
Host Range ◽  
Host Specificity ◽  
Atlantic Forest ◽  
Positive Relationship ◽  
Niche Breadth ◽  
Neotropical Region ◽  
Parasite Abundance ◽  
Ecological Release ◽  
Parasite Richness

AbstractWe compared lizard endoparasite assemblages between the Atlantic Forest and naturally isolated forest enclaves to test the ecological release hypothesis, which predicts that host specificity should be lower (large niche breadth) and parasite abundance should be greater for parasites from isolated forest enclaves (poor assemblages) than for parasites from the coastal Atlantic Forest (rich assemblages). Parasite richness per specimen showed no difference between the isolated and non-isolated areas. Parasite abundance did not differ between the isolated and non-isolated areas but showed a positive relationship with parasite richness considering all areas (isolated and non-isolated). Furthermore, host specificity was positively related to parasite richness. Considering that host specificity is inversely proportional to the host range infected by a parasite, our results indicate that in assemblages with greater parasite richness, parasites tend to infect a smaller range of hosts than do those in simple assemblages. In summary, our study partially supports the ecological release hypothesis: in assemblages with greater parasite richness, lizard parasites from Atlantic Forest are able to increase their parasite abundance (per host), possibly through facilitated infection; however, the amplitude of infected hosts only expands in poor assemblages (lower parasite richness).

Host Range Alteration of the Bioherbicidal FungusAlternaria crassawith Fruit Pectin and Bant Filtrates

Weed Science ◽  
1994 ◽  
Vol 42 (3) ◽  
pp. 487-491 ◽  
Author(s):  
C. Douglas Boyette ◽  
Hamed K. Abbas
Keyword(s):  
Host Range ◽  
Host Specificity ◽  
Water Soluble ◽  
Weed Species ◽  
Eastern Black Nightshade ◽  
Black Nightshade ◽  
Hemp Sesbania ◽  
Greenhouse Tests

In greenhouse tests, the host specificity ofAlternaria crassa(Sacc.) Rands, a mycoherbicide for jimsonweed was altered by the addition of water-soluble filtrates of jimsonweed and hemp sesbania or fruit pectin to fungal conidia suspensions. Several crop and weed species that were resistant to the fungus alone exhibited various degrees of susceptibility following these amendments, with 100% mortality occurring to the weeds hemp sesbania, showy crotalaria, and eastern black nightshade when treated with the fungus/pectin mixture. Nonhost plants that were inoculated with conidial mixtures amended with sucrose or cellulose were not affected. Modification of host specificity of this pathogen could have an influence on its bioherbiddal potential

Multiple host-specificity loci of the broad host-range Rhizobium sp. NGR234 selected using the widely compatible legume Vigna unguiculata

1987 ◽  
Vol 8 (6) ◽  
pp. 447-459 ◽  
Author(s):  
A. Lewin ◽  
C. Rosenberg ◽  
z. A. H. Meyer ◽  
C. H. Wong ◽  
L. Nelson ◽  
...  
Keyword(s):  
Host Range ◽  
Host Specificity ◽  
Vigna Unguiculata ◽  
Broad Host Range ◽  
Rhizobium Sp

scholarly journals Brazilian Peppertree Thrips Pseudophilothrips ichini (Hood) (Insecta: Thysanoptera: Phlaeothripidae)

EDIS ◽  
2020 ◽  
Vol 2020 (2) ◽  
Author(s):  
Patricia Prade ◽  
Carey R Minteer ◽  
James P Cuda
Keyword(s):  
Biological Control ◽  
Host Range ◽  
Host Specificity ◽  
Biological Control Agent ◽  
Control Agent ◽  
Severe Reduction ◽  
Limited Host Range

The Brazilian peppertree thrips, Pseudophilothrips ichini (Hood) (Thysanoptera: Phlaeothripidae), is an insect native to Brazil (Figure 1). This species has been studied for the last 20+ years as a potential biological control agent of Brazilian peppertree, Schinus terebinthifolia Raddi (Sapindales: Anacardiaceae), in Florida (Cuda et al. 2008; Cuda et al. 2008; Manrique at al. 2014; Wheeler et al. 2016a, b). Host specificity experiments demonstrated that Pseudophilothrips ichini has a limited host range (Cuda et al. 2008; Cuda et al. 2009; Wheeler et al. 2017) and can cause a severe reduction of Brazilian peppertree biomass (Manrique at al. 2014).https://edis.ifas.ufl.edu/in1270

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