| avoidance, escape and microstructural adaptations of the tea green leafhopper to water droplets. | rain and dew droplets can dislodge or drown small insects and may be important factors that drive adaptations for avoidance and escape. studying the microstructure of small insects and insect behaviour can help understand these adaptations. we quantified avoidance behaviour and entrapment of nymphs and adults of the tea green leafhopper (empoasca onukii) using simulated rainfall onto host plant foliage and made observations of pretarsi and abdomen microstructures. adults responded rapidly to sim ... | 2016 | 27845388 |
| identification of empoasca onukii (hemiptera: cicadellidae) and monitoring of its populations in the tea plantations of south china. | tea green leafhoppers (empoasca spp.) are considered one of the major pests in tea plantations in asia. they are, however, difficult to monitor due to their size and flying and jumping abilities. in this study, we clarified the identification of the leafhopper species encountered in our study plantations and examined the impacts of sampling methods in estimating population abundance and sex ratio. the natural sex ratio of eggs, nymphs, and adults of tea green leafhopper and the differences betwe ... | 2015 | 26470225 |
| clarification of the identity of the tea green leafhopper based on morphological comparison between chinese and japanese specimens. | tea green leafhopper is one of the most dominant pests in major tea production regions of east asia. this species has been variously identified as empoasca vitis (goëthe), jacobiasca formosana (paoli) and empoasca onukii matsuda in mainland china, taiwan and japan, respectively. recent study of dna sequence data suggested that treatment of this pest as different species in these three adjacent regions is incorrect and that they were a single species; but the correct scientific name for the speci ... | 2015 | 26422616 |
| mitochondrial coi and 16srna evidence for a single species hypothesis of e. vitis, j. formosana and e. onukii in east asia. | tea green leafhopper is one of the most damaging tea pests in main tea production regions of east asia. for lack of recognized morphological characters, the dominant species of tea green leafhoppers in mainland china, taiwan and japan have always been named as empoasca vitis göthe, jacobiasca formosana paoli and empoasca onukii matsuda, respectively. furthermore, nothing is known about the genetic relationships among them. in this study, we collected six populations from mainland china, four pop ... | 2014 | 25506929 |
| gene expression profiles of heat shock proteins 70 and 90 from empoasca onukii (hemiptera: cicadellidae) in response to temperature stress. | empoasca onukii matsuda is a worldwide pest that causes great economic loss in tea growing areas and is significantly affected by temperatures. heat shock protein (hsp) genes are important in insects' response to temperature stress. in this study, two full-length hsp genes, eohsp90 and eohsp70, were cloned from e. onukii using rapid amplification of complementary dna ends. the open reading frames of eohsp90 and eohsp70 were 2,172 bp and 2,016 bp in length, respectively. their deduced amino acid ... | 2015 | 25888707 |
| adult tea green leafhoppers, empoasca onukii (matsuda), change behaviors under varying light conditions. | insect behaviors are often influenced by light conditions including photoperiod, light intensity, and wavelength. understanding pest insect responses to changing light conditions may help with developing alternative strategies for pest control. little is known about the behavioral responses of leafhoppers (hemiptera: cicadellidae) to light conditions. the behavior of the tea green leafhopper, empoasca onukii matsuda, was examined when exposed to different light photoperiods or wavelengths. obser ... | 2017 | 28103237 |
| field background odour should be taken into account when formulating a pest attractant based on plant volatiles. | attractants for pest monitoring and controlling can be developed based on plant volatiles. previously, we showed that tea leafhopper (empoasca onukii) preferred grapevine, peach plant, and tea plant odours to clean air. in this research, we formulated three blends with similar attractiveness to leafhoppers as peach, grapevine, and tea plant volatiles; these blends were composed of (z)-3-hexenyl acetate, (e)-ocimene, (e)-4,8-dimethyl-1,3,7-nonatriene, benzaldehyde, and ethyl benzoate. based on th ... | 2017 | 28150728 |
| does background odor in tea gardens mask attractants? screening and application of attractants for empoasca onukii matsuda. | plant volatiles help herbivores to locate their hosts, and therefore, they could be used to help develop pesticide-free pest management strategies. to develop an attractant for tea leafhopper (empoasca onukii), we screened nine tea plant volatile compounds for their attractiveness using y-tube olfactometer assays. results indicated that tea leafhoppers significantly preferred ocimene, limonene, (z)-3-hexenol, and (z)-3-hexenyl acetate over clean air. these compounds were combined in a blend whic ... | 2017 | 29040654 |
| design of an attractant for empoasca onukii (hemiptera: cicadellidae) based on the volatile components of fresh tea leaves. | the tea leafhopper, empoasca onukii matsuda, is a serious pest of the tea plant. e. onukii prefers to inhabit vigorously growing tender tea leaves. the host selection of e. onukii adults may be associated with plant volatile compounds (vocs). we sought to identify potentially attractive vocs from tea leaves at three different ages and test the behavioral responses of e. onukii adults to synthetic voc blends in the laboratory and field to aid in developing an e. onukii adult attractant. in darkne ... | 2018 | 29361007 |