Publications by authors named "Zhaohuan Xu"

Saprobic hyphomycetes with high density and species diversity were observed on plant debris. During our mycological surveys in southern China, numerous strains were isolated from dead branches of unidentified plants in the forest of Jiangxi and Fujian provinces, China. Phylogenetic analyses of ITS, LSU, , and sequence data using maximum-likelihood (ML) and Bayesian inference (BI) methods revealed the systematic placement of several -like species within .

View Article and Find Full Text PDF

Fungal diversity is rapidly expanding, with numerous species being discovered worldwide. While plant debris is a habitat favoring the survival and multiplication of various microbial species. In this study, several kirschsteiniothelia-like isolates were collected from dead branches of unidentified perennial dicotyledonous plants.

View Article and Find Full Text PDF

(Hendel) is an invasive fruit and vegetable pest, infesting citrus, mango, carambola, etc. We observed that the posterior thoracic scutella of some adults are yellow, some light yellow, and some white in China. Compared with the races with a yellow scutellum (YS) and white scutellum (WS), the race with a light-yellow scutellum (LYS) is dominant in citrus and carambola orchards.

View Article and Find Full Text PDF

Plants play an important role in maintaining the ecological balance of the biosphere, but often suffer from pathogenic fungi during growth. During our continuing mycological surveys of plant pathogens from terrestrial plants in Jiangxi and Yunnan provinces, China, 24 strains of isolated from diseased and healthy tissues of plant leaves represented eight new species, viz. , , , , , , and .

View Article and Find Full Text PDF

contains numerous plant pathogenic and saprobic species associated with a wide range of hosts. Over the course of our mycological surveys of plant pathogens from terrestrial plants in Jiangxi Province, China, eight strains isolated from diseased leaves of four host genera represented three new species of , sp. nov.

View Article and Find Full Text PDF

as a single genus in was introduced by morphological and phylogenetic analyses. Members of this genus occur mainly as asexual morphs, forming effuse, hairy colonies on decaying wood, plant stems, bamboo culms, and fallen leaves and shafts in terrestrial and freshwater habitats. In the present study, saprobic hyphomycetes from plant debris were investigated, and eight new species were introduced based on morphology and phylogenetic analyses of LSU, ITS, , and sequence data.

View Article and Find Full Text PDF

Saprobic hyphomycetes are highly diverse on plant debris. Over the course of our mycological surveys in southern China, three new species, sp. nov.

View Article and Find Full Text PDF

Plant debris are habitats favoring survival and multiplication of various microbial species. During continuing mycological surveys of saprobic microfungi from plant debris in Yunnan Province, China, several Corynespora-like and Dendryphiopsis-like isolates were collected from dead branches of unidentified perennial dicotyledonous plants. Four barcodes, i.

View Article and Find Full Text PDF

To elucidate the composition of semiochemicals of and its function in sexual communication, GC-MS was used to detect the composition of semiochemicals of the overall body and the end abdominal tissue extracts in . Y-tube olfactometer was used to determine the olfactory response of adult female and male to the standard compounds of the five main extracts. The contact reaction test with male and female adults was performed to the eluted adults that smeared tandard compounds.

View Article and Find Full Text PDF

Fourteen Sitobion avenae Fabricius (Hemiptera: Aphididae) clonal lines (clones) originating from China were tested for their ability to transmit BYDV-PAV (one isolate from Belgium and another from China) using wheat plants. By sequence analysis, the coat protein gene of BYDV-PAV-BE was distinguishable from BYDV-PAV-CN. All of the clones could transmit BYDV-PAV, and the transmission varied from 24.

View Article and Find Full Text PDF

SMLS (Sitobion miscanthi L type symbiont) is a newly reported aphid secondary symbiont. Phylogenetic evidence from molecular markers indicates that SMLS belongs to the Rickettsiaceae and has a sibling relationship with Orientia tsutsugamushi. A comparative analysis of coxA nucleotide sequences further supports recognition of SMLS as a new genus in the Rickettsiaceae.

View Article and Find Full Text PDF

The English grain aphid, Sitobion avenae (F.) (Hemiptera: Aphididae), is an important pest insect of wheat, Triticum aestivum (L.), in China.

View Article and Find Full Text PDF

In this study, we investigated Rickettsia infection in Chinese wheat pest aphid (Sitobion miscanthi), moreover detected a possibly new Rickettsia-like symbiont, provisionally named as SMLS(1) (S. miscanthi L type symbiont). The sequence of SMLS 16S rRNA gene is 94% similar to that of its presumed closest relative, Orientia tsutsugamushi.

View Article and Find Full Text PDF