Publications

spatial distribution and sampling plans with fixed level of precision for citrus aphids (hom., aphididae) on two orange species.	aphis spiraecola patch, aphis gossypii glover, and toxoptera aurantii boyer de fonscolombe are three important aphid pests of citrus orchards. in this study, spatial distributions of the aphids on two orange species, satsuma mandarin and thomson navel, were evaluated using taylor's power law and iwao's patchiness. in addition, a fixed-precision sequential sampling plant was developed for each species on the host plant by green's model at precision levels of 0.25 and 0.1. the results revealed tha ...	2018	29365154
diversity of the most commonly reported facultative symbionts in two closely-related aphids with different host ranges.	richness and abundance of facultative symbionts vary strongly with aphid species and genotype, symbiont strain, host plant, biogeography, and a number of abiotic factors. despite indications that aphids in the same ecological niche show similar levels of facultative symbiont richness, existing reports do not consider the potential role of host plants on aphid microbial community. little is known about how oligophagy and polyphagy may be influenced by secondary symbiont distribution, mainly becau ...	2017	28620748
slow release of plant volatiles using sol-gel dispensers.	the black citrus aphid, also known as the tea aphid, (toxoptera aurantii boyer) attacks economically important crops, including tea (camellia sinensis (l.) o. kuntze). in the current study, silica sol-gel formulations were screened to find one that could carry and release c. sinensis plant volatiles to lure black citrus aphids in a greenhouse. the common plant volatile trans-2-hexen-1-al was used as a model molecule to screen for suitable sol-gel formulations. a znose (electronic sensor technolo ...	2014	26470065
first recording of the sound produced by the black citrus aphid, toxoptera aurantii (boy.).		1971	22894863
differential expression pattern of an acidic 9/13-lipoxygenase in flower opening and senescence and in leaf response to phloem feeders in the tea plant.	lipoxygenase (loxs) is a large family of plant enzymes that catalyse the hydroperoxidation of free polyunsaturated fatty acids into diverse biologically active compounds, collectively named phyto-oxylipins. although multiple isoforms of loxs have been identified in a wide range of annual herbaceous plants, the genes encoding these enzymes in perennial woody plants have not received as much attention. in camellia sinensis (l.) o. kuntze, no lox gene of any type has been isolated, and its possible ...	2010	20969806
effect of an invasive and native ant on a field population of the black citrus aphid (hemiptera: aphididae).	invasive ants often enter into facultative mutualisms that frequently lead to outbreaks of the hemipteran partner. native ants may also enter into similar mutualisms but often these do not lead to outbreaks. however, field studies comparing the impact of an invasive and native ant on a honeydew-producing hemipteran are lacking. we monitored numerical changes of the black citrus aphid, toxoptera aurantii, tended by adjacent colonies of the invasive argentine ant, linepithema humile, and the endem ...	2009	20021757
estimation of the number of aphids carrying citrus tristeza virus that visit adult citrus trees.	aphid species were counted on citrus trees in orchards in valencia, spain, in the spring and autumn of 1997, 1998 and 1999. moericke yellow water traps, the 'sticky shoot' method and counts of established colonies were used in extensive surveys in which 29,502 aphids were recorded and identified. aphis spiraecola and aphis gossypii were the most abundant aphid species. the numbers of aphid species landing on mature trees of grapefruit, sweet orange, lemon and clementine and satsuma mandarins, we ...	2004	15036840
behavioral and electrophysiological responses of natural enemies to synomones from tea shoots and kairomones from tea aphids, toxoptera aurantii.	olfactometer bioassays and electrophysiological studies showed that the lacewing, chrysopa sinica, the aphid parasitoid, aphidius sp., and the coccinellid, coccinella septempunctata, all responded to volatiles from tea aphids, toxoptera aurantii, to hexane or ether rinses of tea aphid cuticles, and to synomones released by aphid-damaged tea shoots, as well as to the tea shoot-aphid complex. each natural enemy spent more time searching on a filter paper treated with tea aphid honeydew than on a b ...	2002	12523563
development, survival and reproduction of black citrus aphid, toxoptera aurantii (hemiptera: aphididae), as a function of temperature.	the development, survival, and reproduction of the black citrus aphid toxoptera aurantii (boyer de fonscolombe) were evaluated at ten constant temperatures (4, 7, 10, 15, 20, 25, 28, 30, 32 and 35 degrees c). development was limited at 4 and 35 degrees c. between 7 and 32 degrees c, developmental periods of immature stages varied from 44.2 days at 7 degrees c to 5.3 days at 28 degrees c. overall immature development required 129.9 degree-days above 3.8 degrees c. the upper temperature thresholds ...	2001	11818043
[behavior response of four leis axyridis varieties to volatiles from tea and toxoptera aurantii].	the behavior response of the adults of four leis axyridis varieties to kairomone from taxoptera aurantii was determined by y-shape olfaction instrument. the results showed that when supplied with two-two-combinations of taxoptera aurantii, brevicoryne brassicae and lipaphis erysimi, tea aphids plus aphid-damaged vs. normal shoots, and aphid-damaged vs. normal shoots, leis axyridis had a preference for tea aphids, tea aphids plus aphid-damaged tea shoots, or aphid-damaged tea shoots. there existe ...	2000	11767644
incidence and epidemiology of citrus tristeza virus in the valencian community of spain.	the first outbreak of citrus tristeza disease in spain caused by citrus tristeza virus (ctv) was recorded in 1957 in the valencian community (vc). in total c. 40 million trees, mainly of sweet orange and mandarin grafted on sour orange rootstocks, declined due to ctv. large-scale surveys in different municipalities of the vc indicated that the disease spread very fast. incidence increased from 11% in 1989 to 53% in 1998. toxoptera aurantii and aphis spiraecola (inefficient aphid vectors of ctv) ...	2000	11137164
[contribution to the study of population dynamics of the louse toxoptera aurantii (boyer) on the lemon tree (citrus limon burm)].		1968	5666260