The Experts below are selected from a list of 39 Experts worldwide ranked by ideXlab platform

San-an Wu - One of the best experts on this subject based on the ideXlab platform.

  • DNA barcoding of common soft scales (Hemiptera: Coccoidea: Coccidae) in China
    Bulletin of Entomological Research, 2015
    Co-Authors: Xu-bo Wang, Qianghui Zhou, Y Z Zhang, J. T. Zhang, Jun Deng, San-an Wu
    Abstract:

    The soft scales (Hemiptera: Coccoidea: Coccidae) are a group of sap-sucking plant parasites, many of which are notorious agricultural pests. The quarantine and economic importance of soft scales necessitates rapid and reliable identification of these taxa. Nucleotide sequences of the mitochondrial cytochrome c oxidase subunit I (COI) gene (barcoding region) and 28S rDNA were generated from 340 individuals of 36 common soft scales in China. Distance-based [(best match, Automated Barcode Gap Discovery (ABGD)], tree-based (neighbor-joining, Bayesian inference), Klee diagrams, and general mixed Yule coalescent (GMYC) models were used to evaluate barcoding success rates in the data set. Best match showed that COI and 28S sequences could provide 100 and 95.52% correct identification, respectively. The average interspecific divergences were 19.81% for COI data and 20.38% for 28S data, and mean intraspecific divergences were 0.56 and 0.07%, respectively. For COI data, multiple methods (ABGD, Klee, and tree-based methods) resulted in general congruence with morphological identifications. However, GMYC analysis tended to provide more molecular operational taxonomic units (MOTUs). Twelve MOTUs derived from five morphospecies ( Rhodococcus sariuoni, Pulvinaria vitis, Pulvinaria aurantii, Parasaissetia nigra , and Ceroplastes rubens ) were observed using the GMYC approach. In addition, tree-based methods showed that 28S sequences could be used for species-level identification (except for Ceroplastes Ceriferus – Ceroplastes pseudoCeriferus ), even with low genetic variation (

  • notes on the indian wax scale Ceroplastes Ceriferus fabricius from korea hemiptera coccidae
    Korean Journal of Applied Entomology, 2012
    Co-Authors: San-an Wu
    Abstract:

    The Indian wax scale, Ceroplastes Ceriferus (Fabricius) is redescribed so that it can be distinguished from Ceroplastes pseudoCeriferus Green, which it most nearly resembles and has been confused with in Korea. A dichotomous key, photographs, and DNA barcode information are also presented for identifying three Ceroplastes species from Korea.

Xie Ying - One of the best experts on this subject based on the ideXlab platform.

  • ultra morphology and chemical composition of waxes secreted by two wax scale insects Ceroplastes Ceriferus fabricius and c japonicus green homoptera coccidae
    Acta Entomologica Sinica, 2005
    Co-Authors: Xie Ying
    Abstract:

    The ultra-morphology and chemical composition of waxes secreted by the scale insects, Ceroplastes Ceriferus (Fabricius) and C. japonicus Green (Homoptera: Coccidae) were studied with the techniques of scanning electron microscope (SEM) and gas chromatography/ mass spectrometry (GC/MS). The results indicate that the two wax scale insects have a similar waxy secretion and wax test forming process. The scale insects in their first and second instars secreted dry wax that formed a star_shaped test. Every wax horn around the margin of the test consists of two segments. This is corresponding to the two developmental instars. Furthermore, each of the two segments of the wax horn included many sub_segments. Meanwhile, the wax accumulated into a cap_like structure with many layers on the dorsal region of the body. It was believed that some kind of rhythm existed in the wax secreting. A lot of striate punctures formed wax glands that are usually unable to be found with the slide specimens of the wax scale insects observed under the light microscopy. As the scales developed into the 3rd instar and adult stage, the wax secretion changed into “wet state" and formed a waxy test in tortoise shell shape. The wax glands on the dorsal surface mainly are trilocular and quadrilocular pores. Dense wax pores arranging in longitudinal strips also were found over the anal plates. The main chemical compositions of the wax secretions of the two scale insects were determined with GC/MS by the two methods of esterification and unesterification. For C. Ceriferus, 14 and 14 compounds were determined from its wax secretion with the two methods respectively; while 10 and 25 compounds were determined respectively from the wax secretion of C. japonicus. The main compositions of their wax secretions include a series of long chain saturated and unsaturated hydrocarbons, fatty acids, fatty alcohol, esters, and some compounds with ring structures of multi_, macro_, or heterocyclic ring. Their biological functions were discussed.

Penny J. Gullan - One of the best experts on this subject based on the ideXlab platform.

  • The current distribution and geographical origin of the scale insect pest Ceroplastes sinensis (Hemiptera: Coccidae)
    Bulletin of Entomological Research, 1994
    Co-Authors: Qin Ting-kui, Penny J. Gullan, G. Andrew C. Beattie, John W.h. Trueman, Peter S. Cranston, Murray J. Fletcher, D. P. A. Sands
    Abstract:

    Ceroplastes sinensis Del Guercio is a pest of commercial citrus in Australia and has been recorded from New Zealand, southern Europe, northern Africa, North America and Mexico. Its distribution is mainly temperate and it is more restricted climatically than previously believed. Uncertainty concerning the place of origin of C. sinensis has thwarted previous attempts at biological control. In the present study, a novel and cost-effective approach using cladistic estimates is demonstrated to determine the place of its origin. Cladistically derived phylogenies are commonplace for many organisms, but the method has not been used before to predict the area of origin of a cosmopolitan pest. Cladistic analysis of the wax scales predicts a native range for C. sinensis within Central or South America. This prediction appears to have been confirmed by the recent discovery of heavily parasitized individuals of C. sinensis in Argentina. The cladistic analysis also allows prediction of the geographical origin of three other widespread wax scale speries: Ceroplastes Ceriferus (Fabricius) may be of Neotropical origin, C. rubens Maskell and C. rusci (Linnaeus) are probably native to the Afrotropical region. The approach used has wide implications because the native areas of many other economically important pests are still unknown or uncertain.

  • Taxonomy of the wax scales (Hemiptera: Coccidae: Ceroplastinae) in Australia.
    Invertebrate Systematics, 1994
    Co-Authors: Penny J. Gullan
    Abstract:

    A comprehensive taxonomic treatment of the wax scales in Australia is presented. Seven species are included; of these, six [Ceroplastes Ceriferus (Fabricius), C. destructor Newstead, C. floridensis Comstock, C. insulanus De Lotto, C. rubens Maskell, C. sinensis Del Guercio] were known in Australia previously, and one [Vinsonia stellifera (Westwood)] is recorded from Australia for the first time. The adult females of C. destructor, C. insulanus and C. sinensis, and the immature stages of males and females of C. sinensis are described and illustrated. Keys to the adult females of the seven species known in Australia and to both sexes and different stages of C. sinensis are provided.

Yasuko Miyamoto - One of the best experts on this subject based on the ideXlab platform.

X. L. Li - One of the best experts on this subject based on the ideXlab platform.

  • A NEW SPECIES OF THE GENUS ANICETUS (HYMENOPTERA: ENCYRTIDAE) FROM CHINA
    Entomotaxonomia, 1991
    Co-Authors: Z. H. Xu, X. L. Li
    Abstract:

    A new species of the genus Anicetus is described and illustrated in this paper. It belongs to the ceroplastis group of Anicetus. The specimens are deposited in the laboratory of biological control, department of plant protection, Zhejiang Agricultural University.Anicetus zhejiangensis sp. nov.This new species is similar to A. st ylatus Subba Rao, and can be distinguished from the latter by the following characters: ① second intersegmental sulcus of club not complete, and absent near the ventral, ② postmarginal vein apparently shorter than stigma vein, ③ 2 rows of setae under marginal vein, ④ middle tibial spur as long as basal tarsus, ⑤ exserted ovipositor one-third as long as the abdomen.Holotype: (?), Banshan, Hangzhou (30.2°?N, 120.8° ?E), 20-Ⅹ-1983, Xu Zhihong, ex. Ceroplastes Ceriferus Anderson. Allotype: (?) , same data as holotype. Paratypes: 10 (?) (?), 2 (?) (?) , same data as holotype, No. C8359-2; 8 (?) (?), 2 (?) (?) , Hua jiachi, Hangzhou, 29-Ⅳ-1985, Qian Ying, ex. C. japonicus Green, No. C8501-1- 2;2 (?) (?), 3 (?) (?) , Lixihu, Hangzhou, 13-Ⅴ -1985, Xu Zhihong, ex. C. japonicus, No. C8506-3.