| species delimitation in asexual insects of economic importance: the case of black scale (parasaissetia nigra), a cosmopolitan parthenogenetic pest scale insect. | asexual lineages provide a challenge to species delimitation because species concepts either have little biological meaning for them or are arbitrary, since every individual is monophyletic and reproductively isolated from all other individuals. however, recognition and naming of asexual species is important to conservation and economic applications. some scale insects are widespread and polyphagous pests of plants, and several species have been found to comprise cryptic species complexes. paras ... | 2017 | 28459805 |
| scanning electron microscopy studies of the antennal sensilla of metaphycus parasaissetiae zhang & huang (hymenoptera: encyrtidae). | metaphycus parasaissetiae zhang & huang (hymenoptera: encyrtidae) is an important adult parasitoid of parasaissetia nigra nietner (hemiptera: coccoidea). the external morphology of the antennal sensilla of male and female m. parasaissetiae was examined using scanning electron microscopy. the geniculate antennae of male and female m. parasaissetiae were composed of a scape with a basal radicula, a barrel-shaped pedicel, and a long flagellum. twelve morphologically distinct types of sensilla were ... | 2013 | 23949810 |
| [control effect of parasitic metaphycus parasaissetiae on host parasaissetia nigra]. | a laboratory test was conducted to study the control effect of parasitic metaphycus parasaissetiae on its host parasaissetia nigra. the functional reactions of the parasitism conformed to the holling type ii equation, but the parameters of the functional reactions varied with temperature. taking the ratio of instant attack rate to preying time (a/t(h)) as an evaluation index, the preying efficiency at 30 degrees c was the highest, with a/t(h) being 23.4211. there was a stronger interference effe ... | 2010 | 21043131 |
| scale insects (hemiptera: coccoidea) on myrciaria dubia (myrtaceae) in brazil. | commercial cultivation of the fruit tree myrciaria dubia (myrtaceae) is being developed in brazil but phytophagous insects, including scale insects (hemiptera: coccoidea), can become pests in plantations. the coccids ceroplastes jamaicensis white, coccus viridis (green), parasaissetia nigra (nietner), pseudokermes vitreus (cockerell) (coccidae), and the diaspidid pseudaonidia trilobitiformis (green) were collected on m. dubia in the municipality of belém and tomé-açu, state of pará (pa), metropo ... | 2016 | 26957084 |
| dna barcoding of common soft scales (hemiptera: coccoidea: coccidae) in china. | 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 disco ... | 2015 | 25989705 |