The Cixiid Planthopper Haplaxius ovatus (Ball) (Hemiptera: Fulgoroidea): Association with Switchgrass (Panicum virgatum; Poaceae) and New Distribution Records

Wheeler, A. G.; Wilson, Stephen W.

doi:10.4289/0013-8797.116.3.358

Cited by 5 publications

(1 citation statement)

References 30 publications

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“…The disease is spread by H. crudus, considered the main vector insect. This fact does not exclude the possibility of transmission through other sap-sucking insects, like other species of American palm cixiid, which is caused by the habit of feeding on the floemamatic sap, a local where its causative phytoplasma is found (Wheeler & Wilson, 2014;Narváez et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Spatial Analysis and Population Dynamics of Haplaxius crudus (Hemiptera: Cixiidae) in Coconut Amazon

Bastos¹,

Santos²,

Penner³

et al. 2019

JAS

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Haplaxius crudus is the primary vector of the phytoplasma that causes the Lethal Yellowing of Coconut, a disease that has become a barrier to the establishment of large coconut plantations in the world. The objective of this study was to determine the spatial distribution pattern and population dynamics of H. crudus adults by correlating them with the abiotic factors, such as temperature and rainfall in commercial dwarf coconut palm plantations. Collection of American palm cixiid was carried out using yellow sticky traps fixed to the abaxial part of the coconut leaves. The sampled plants were georeferenced to obtain the geographic coordinates and geostatistical analysis, besides the planialtimetric survey of the experimental plot for the preparation of the map that shows the topographic conformation of the terrain. Insects were found at the study site throughout the year, showing greater abundance in months when the average monthly temperatures and rainfall were not significant. The climatic factors showed a correlation with the total of insects, positive for the temperature, with 0.733 and negative for the precipitation with -0.606. The spatial distribution of H. crudus displayed an aggregate pattern, explained by the spherical model. The infestation focus occurred in the periphery of the plot, near a Brachiaria humidicola pasture. It was concluded that the infestation of the H. crudus showed a behavior directly related to the local climatic conditions and the aggregate spatial distribution explained by the spherical model, therefore, forming shrubs with a radius of 154 to 190 m, with areas of influence between 7.45 and 17.80 ha, which coincide with the lower part of the terrain.

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Section: Introductionmentioning

confidence: 99%

Spatial Analysis and Population Dynamics of Haplaxius crudus (Hemiptera: Cixiidae) in Coconut Amazon

Bastos¹,

Santos²,

Penner³

et al. 2019

JAS

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The coconut pathosystem: weed hosts of nymphs of the American palm CixiidHaplaxius crudus(Hemiptera: Fulgoroidea)

Hernández

Alejandro

Ortiz-García

et al. 2018

Journal of Natural History

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Switchgrass as a bioenergy feedstock: advances in breeding and genomics research

et al. 2015

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Switchgrass (Panicum virgatum L), a native perennial of the North American prairie, possesses high biomass yield potential in marginal environments with limited input. It is an outcrossing tetraploid (2n = 4x = 36) with disomic inheritance. Previous research on cultivar improvement was focused primarily on herbage yield and forage digestibility. The decision of the U.S. Department of Energy Biomass Feedstock Development Program (NFDP) to develop switchgrass as a lignocellulosic bioenergy feedstock in the USA in the 1990s prompted a growing motivation for breeding and genomics research. The species is in early stages of domestication and current cultivars include mostly early releases for forage use that were selected directly from collected strains. Recent releases specifically for biomass feedstock have undergone one or two cycles of selection. As an outcrossing self-incompatible species, switchgrass possesses ample genetic diversity both between and within native populations. Conventional population improvement approaches such as recurrent restricted phenotypic selection (RRPS) are effective in improving forage yield and digestibility. Hybrids between different populations also demonstrated heterosis for key feedstock traits. However, genetic gains per year from selection using conventional approaches are low due to perennial growth habit and low heritability of important traits. Genomic approaches could be helpful in improving selection gain. Significant efforts have been placed in developing genomics resources. Genetic linkage maps were published and a large number of DNA-based markers were developed. Whole-genome sequencing is near completion, and the genetic bases of inheritance of key feedstock traits are being investigated. New insights into the molecular mechanisms will enable tailoring more efficient cultivar breeding approaches in the future.

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The Cixiid Planthopper Haplaxius ovatus (Ball) (Hemiptera: Fulgoroidea): Association with Switchgrass (Panicum virgatum; Poaceae) and New Distribution Records

Cited by 5 publications

References 30 publications

Spatial Analysis and Population Dynamics of Haplaxius crudus (Hemiptera: Cixiidae) in Coconut Amazon

Spatial Analysis and Population Dynamics of Haplaxius crudus (Hemiptera: Cixiidae) in Coconut Amazon

The coconut pathosystem: weed hosts of nymphs of the American palm CixiidHaplaxius crudus(Hemiptera: Fulgoroidea)

Switchgrass as a bioenergy feedstock: advances in breeding and genomics research

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