| toxicity of tobacco smoke to the spotted alfalfa aphid therioaphis maculata (buckton). | | 1967 | 6053423 |
| an association between phlebotomine sandflies and aphids in the peruvian andes. | as the composition of natural sugars in the diet of adult sandflies (diptera: psychodidae: phlebotominae) may affect the development of leishmania (kinetoplastida: trypanosomatidae) in sandfly guts, and so play an important role in the epidemiology of leishmaniasis, there is increasing interest in the sources of sugars for wild sandflies. advanced chromatography techniques have provided indirect evidence that wild sandflies feed on honeydew, a substance released by aphids (hemiptera: aphididae) ... | 1995 | 7787219 |
| activity of aphids associated with lettuce and broccoli in spain and their efficiency as vectors of lettuce mosaic virus. | this research sought to identify the aphid virus vector species associated with lettuce and broccoli crops in spain, and to determine their population dynamics and ability to transmit lettuce mosaic virus (lmv). green tile traps and moericke yellow water-pan traps were used to monitor aphid flights during the spring and autumn growing seasons of 2001. aphid species feeding on lettuce were counted weekly. the transmission efficiencies of lmv were determined for the aphid species caught most frequ ... | 2004 | 15036838 |
| the effect of predators and hymenopterous parasites on population fluctuations of alfalfa aphids. | among alfalfa pests in iran three aphid species, green alfalfa aphid acyrthosiphon pisum harris spotted alfalfa aphid therioaphis trifolii forma maculata buckton and blue alfalfa aphid, acyrthosiphon kondoi shinji are important pests. the green alfalfa aphid can be observed all along the growing season particularly from late may to mid june at karaj climate conditions. during this period, the mean monthly maximum temperature and relative humidity were about 28 degrees c and 60-65% respectively. ... | 2005 | 16628912 |
| [effects of cutting on the population dynamics of main insect pests on alfalfa]. | a systematic investigation was made on the effects of cutting on the population dynamics of main insect pests on alfalfa in dingxi of gansu province. the results showed that the effects of cutting varied significantly with the kinds of insect pests. the seasonal average population densities of therioaphis trifolii, acyrthosiphon pisum and thrips decreased significantly and maintained at a low level under the first cutting in early june, but less variation was observed under the second cutting in ... | 2008 | 18533546 |
| transmission efficiency of cucumber mosaic virus by aphids associated with virus epidemics in snap bean. | cucumber mosaic virus (cmv) is a major component of the virus complex that has become more pronounced in snap bean in the midwestern and northeastern united states since 2001. multiple-vector-transfer tests were done to estimate the cmv transmission efficiencies (p) of the main aphid species identified in commercial snap bean fields in new york and pennsylvania. the four most efficient vectors (p > 0.05) were aphis gossypii, a. glycines, acyrthosiphon pisum, and therioaphis trifolii, which were ... | 2008 | 18943413 |
| modeling temporal trends in aphid vector dispersal and cucumber mosaic virus epidemics in snap bean. | cucumber mosaic virus (cmv) has become a major limiting factor in snap bean production in the great lakes region of north america, and epidemics have occurred more frequently since the soybean aphid, aphis glycines matsumura, was introduced. major aphid vectors of cmv epidemics were identified by statistically relating their temporal dispersal trends to the incidence of cmv. alates were monitored weekly using water pan traps in 74 snap bean fields in new york and pennsylvania from 2002 to 2006. ... | 2009 | 19825288 |
| [suitable habitat of therioaphis trifolii population on arable lands of southern ningxia based on gis]. | based on gis techniques, the interpolation maps of therioaphis trifolii population on the arable lands in yuanzhou district of guyuan city in different periods were overlapped with the ecological regionalization map and digital altitude map, aimed to analyze the relations of t. trifolii population density with its ecological environment and geographical distribution. in the study area, the occurrence and distribution of t. trifolii had close relations with climate, geomorphology, and altitude. t ... | 2009 | 19947224 |
| differential life history trait associations of aphids with nonpersistent viruses in cucurbits. | the diversity of vectors and fleeting nature of virus acquisition and transmission renders nonpersistent viruses a challenge to manage. we assessed the importance of noncolonizing versus colonizing vectors with a 2-yr survey of aphids and nonpersistent viruses on commercial pumpkin farms. we quantified aphid alightment using pan traps, while testing leaf samples with multiplex rt-pcr targeting cucumber mosaic virus (cmv), zucchini yellow mosaic virus (zymv), watermelon mosaic virus (wmv), and pa ... | 2015 | 26313961 |
| natural occurrence of entomophthoroid fungi of aphid pests on medicago sativa l. in argentina. | four species of entomophthoroid fungi, pandora neoaphidis (entomophthorales: entomophthoraceae), zoophthora radicans (entomophthorales: entomophthoraceae), entomophthora planchoniana (entomophthorales: entomophthoraceae) and neozygites fresenii (neozygitales: neozygitaceae) were found to infect aphis craccivora, therioaphis trifolii, and acyrthosiphon pisum and unidentified species of acyrthosiphon on lucerne in argentina. samples were collected from five sites (ceres, rafaela, sarmiento, monte ... | 2014 | 24721275 |
| characterization of resistance to multiple aphid species (hemiptera: aphididae) in medicago truncatula. | aphids are phloem-feeding insects that damage many important crops throughout the world yet, compared to plant-pathogen interactions, little is known about the mechanisms by which plants become resistant to aphids. medicago truncatula (barrel medic) is widely considered as the pre-eminent model legume for genetic and biological research and in australia is an important pasture species. six cultivars of m. truncatula with varying levels of resistance to two pests of pasture and forage legumes, th ... | 2007 | 17298680 |
| independent action and contrasting phenotypes of resistance genes against spotted alfalfa aphid and bluegreen aphid in medicago truncatula. | host resistance to aphids is poorly understood. medicago truncatula, a model legume and cultivated pasture species, was used to elucidate defense against two aphid species, therioaphis trifolii f. maculata (spotted alfalfa aphid, saa) and acyrthosiphon kondoi (bluegreen aphid, bga). aphid performance and plant damage were compared between near-isogenic cultivars, mogul and borung, that differ in resistance to both aphids. analyses of aphid resistance in mogul x borung f2 plants and their progeny ... | 2007 | 17244058 |
| identification of a point mutation in the ace1 gene of therioaphis trifolli maculata and detection of insecticide resistance by a diagnostic pcr-rflp assay. | aphids are important agricultural pests worldwide. their control is largely based on chemical insecticides. one species that shows important invasive abilities and host-plant-related differences is therioaphis trifolii (monell) (hemiptera: aphididae). t. trifolii maculata, also known as spotted alfalfa aphid (saa), can be very injurious to alfalfa crops in certain regions, such as in saudi arabia for effective control it is essential to diagnose and monitor the resistance mechanisms in the saa p ... | 2015 | 26278202 |
| characterization and genetic dissection of resistance to spotted alfalfa aphid (therioaphis trifolii) in medicago truncatula. | aphids cause significant yield losses in agricultural crops worldwide. medicago truncatula, a model legume, cultivated pasture species in australia and close relative of alfalfa (medicago sativa), was used to study the defence response against therioaphis trifolii f. maculate [spotted alfalfa aphid (saa)]. aphid performance and plant damage were compared among three accessions. a20 is highly susceptible, a17 has moderate resistance, and jester is strongly resistant. subsequent analyses using a17 ... | 2013 | 24058162 |
| [effects of temperature on population parameters of therioaphis trifolii (monell) (homoptera: aphididae)]. | to investigate the effects of temperature on the population growth of therioaphis trifolii (monell) (homoptera: aphididae), a laboratory experiment was conducted to study the development, reproduction, and life table of the spotted alfalfa aphid at nine constant temperatures ranged from 15 to 35 degrees c. the aphid could not survive at 35 degrees c. the total nymphal period shortened significantly with increasing temperature. from birth to adult stage, it required 18.33 days at 15 degrees c, bu ... | 2012 | 23173469 |
| alfalfa (medicago sativa l.) shoot saponins: identification and bio-activity by the assessment of aphid feeding. | biochemical components in alfalfa (medicago sativa l.), such as saponins, can act as protecting factors against bio-stresses. saponins are also antifeedants and show oral toxicity towards higher and lower animals. changes in saponins, such as variation in the carbon skeleton, or hydrolysis of saponin glycosides and other conjugates, may change their biological effects. the aims of this research were to study saponin variation in different growth stages of alfalfa and to investigate the biologica ... | 2011 | 20875185 |
| [spatial structure analysis and distribution simulation of therioaphis trifolii population based on geostatistics and gis]. | based on geographic information system and geostatistics, the spatial structure of therioaphis trifolii population of different periods in yuanzhou district of guyuan city, the southern ningxia province, was analyzed. the spatial distribution of therioaphis trifolii population was also simulated by ordinary kriging interpretation. the results showed that therioaphis trifolii population of different periods was correlated spatially in the study area. the semivariograms of therioaphis trifolii cou ... | 2007 | 18260467 |