First Report of an Epidemic in Tomato Caused by Two Whitefly-Transmitted Geminiviruses in Puerto Rico.

Brown, Judith K.; Bird, Julio; Banks, G. K.; Sosa, Miriam; Kiesler, Karl; Cabrera, Irma; Fornaris, Guillermo J.

doi:10.1094/pd-79-1250a

Cited by 16 publications

(1 citation statement)

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“…; (2) forming chlorotic spots on leaves as affected by damage of tissues caused by stylet puncture; (3) forming anthocyanin pigment; and (4) leaf fall and inhibiting plant growth (de Barro 1995;Inbar and Gerling 2008;Hoddle 2011). Indirect damage by B. tabaci is transmission of plant-pathogenic viruses (Byrne and Bellows 1990;Jones 2003), particularly on tomato (Brown et al 1995;Perring 2001). Damage caused by virus infection ranges from mild symptoms, such as leaf discoloration, to overall yield reduction, severe fruit necrosis, flower and fruit abortions, and plant death (Maruthi et al 2003).…”

Section: Introductionmentioning

confidence: 99%

POTENCY OF PREDATOR (Menochilus sexmaculatus) AUGMENTATION FOR WHITE FLY (Bemisia tabaci) MANAGEMENT AND ITS EFFECT ON GEMINI VIRUS INFESTATION ON TOMATO

Setiawati¹,

Gunaeni²,

Uhan³

et al. 2013

Indones. J. Agric. Sci.

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Bemisia tabaci (Genn.) (Homoptera: Aleyrodidae) is one of the most serious pests on tomato. It is mainly controlled by chemical means, requiring some 25 sprays during the average growing season. The extensive and repeated use of insecticides has disrupted the natural balance between this pest and its natural enemies. In this study, Menochilus sexmaculatus F. was evaluated as a possible biological control agent of B. tabaci and its effect on gemini virus infestation. The study was conducted at the experimental station of the Indonesian Vegetables Research Institute (IVeGRI) in Lembang, West Java (1,250 m above sea level) from August to December 2008. The experimental plots consisted of 0.35 ha of tomato (± 100 m 2 per plot) and spatially separated with four rows of maize (a minimum of 1 m) interplot distance to prevent cross-contamination among plots. The experiment was arranged in completely randomized block design with eight treatments and four replications. M. sexmaculatus were released at 24 days after planting. The treatments were designed according dosages and schedules at three released populations (i.e. 10 predators per plot, 20 predators per plot, and 10 predators per plot at vegetative stage followed by 20 predators per plot at generative stage); two places of release (center and edge of the plot); and two schedules of release (weekly and biweekly). Efficacy of the predator was measured in terms of the density of B. tabaci, both before and after release of the predator and its effect on gemini virus infestation. The result indicated the potential use of M. sexmaculatus to control B. tabaci and its effect on gemini virus infestation on tomato. Reductions in B. tabaci populations and subsequent tomato yields were significant. B. tabaci population in plots receiving 10 predators showed 73.62% and 75.75% reductions by the end of experiment. The incidence and intensity of gemini virus were consistently and significantly lowest and tomato yield gain was observed when 10 predators were released at weekly intervals. It is suggested that release of M. sexmaculatus against B. tabaci on tomato may be offered as an alternative solution to increase implementation of biologically-based B. tabaci management.

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Section: Introductionmentioning

confidence: 99%

POTENCY OF PREDATOR (Menochilus sexmaculatus) AUGMENTATION FOR WHITE FLY (Bemisia tabaci) MANAGEMENT AND ITS EFFECT ON GEMINI VIRUS INFESTATION ON TOMATO

Setiawati¹,

Gunaeni²,

Uhan³

et al. 2013

Indones. J. Agric. Sci.

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Virus-Specific Adaptations for the Production of a Pseudorecombinant Virus Formed by Two Distinct Bipartite Geminiviruses from Central America

et al. 2000

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Most whitefly-transmitted geminiviruses possess bipartite genomes comprising DNAs A and B. The production of viable pseudorecombinants by reassortment of infectious cloned components is generally limited to isolates/strains of a particular virus. Following exchange of cloned genomic components of Sida golden mosaic virus from Costa Rica (SiGMV/Co) and Sida golden mosaic virus from Honduras (SiGMV/Ho(yv)), the pseudorecombinant viruses were infectious in various plant species. Three DNA B components (B(1), B(2), B(3)), different in a few nucleotides, were isolated from Sida rhombifolia naturally infected with SiGMV/Ho(yv). Only SiGMV/Ho(yv) DNA B(2) was able to form a viable pseudorecombinant with SiGMV/Co DNA A. In protoplasts, as well as in inoculated leaves, SiGMV/Co DNA A trans-replicated the heterogenomic SiGMV/Ho(yv) DNA B(1) component, indicating that impaired movement is involved in the deficiency of SiGMV/Ho(yv) DNA B(1) to form a pseudorecombinant virus with SiGMV/Co DNA A. Even after extensive mutation analysis of SiGMV/Ho(yv) DNA B(1) and B(2), we were unable to pinpoint differences in SiGMV/Ho(yv) DNA B(2) that allowed the formation of a pseudorecombinant virus with SiGMV/Co DNA A. We observed a gradual increase of infectivity from noninfectious SiGMV/Co DNA A/SiGMV/Ho(yv) DNA B(1) and B(3) pseudorecombinant virus to pseudorecombinant viruses showing normal systemic spread of both genomic components associated with symptomatic plants.

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The Bemisia Tabaci Complex: Genetic and Phenotypic Variation and Relevance to TYLCV-Vector Interactions

Brown

2007

Tomato Yellow Leaf Curl Virus Disease

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First Report of an Epidemic in Tomato Caused by Two Whitefly-Transmitted Geminiviruses in Puerto Rico.

Cited by 16 publications

References 0 publications

POTENCY OF PREDATOR (Menochilus sexmaculatus) AUGMENTATION FOR WHITE FLY (Bemisia tabaci) MANAGEMENT AND ITS EFFECT ON GEMINI VIRUS INFESTATION ON TOMATO

POTENCY OF PREDATOR (Menochilus sexmaculatus) AUGMENTATION FOR WHITE FLY (Bemisia tabaci) MANAGEMENT AND ITS EFFECT ON GEMINI VIRUS INFESTATION ON TOMATO

Virus-Specific Adaptations for the Production of a Pseudorecombinant Virus Formed by Two Distinct Bipartite Geminiviruses from Central America

The Bemisia Tabaci Complex: Genetic and Phenotypic Variation and Relevance to TYLCV-Vector Interactions

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