A SECOND COMPONENT FOUND IN A TURNIP LATENT VIRUS COMPLEX

1966 ◽  
Vol 44 (6) ◽  
pp. 795-801
Author(s):  
J. P. MacKinnon ◽  
F. L. Lawson
Keyword(s):  
Brassica Rapa ◽  
Myzus Persicae ◽  
Aphid Species ◽  
Latent Virus ◽  
Virus Complex

Myzus persicae (Sulz.) transmitted a second component virus from a turnip latent virus complex to healthy Physalis floridana Rydb. seedlings after passage of the complex through turnip (Brassica rapa L.). The symptoms were small yellow specks on the leaves which became more pronounced on new growth when infected plants were cut back. Combined transmissions with the first component, mild chlorosis virus, produced yellow-net symptoms characteristic of the complex.The second component was transmitted from P. floridana to P. floridana by graft and of six aphid species tested, only M. persicae transmitted it. The first component alone was transmitted from the complex by M. circumflexus (Buckton). Only a few plants developed symptoms of the second component after inoculation by aphids, and data from some tests indicated that infected P. floridana may sometimes be symptomless. Both components were transmitted in the persistent or circulative manner and were not sap-transmissible.

A MILD CHLOROSIS VIRUS OF PHYSALIS FLORIDANA FOUND IN A TURNIP LATENT VIRUS COMPLEX

1965 ◽  
Vol 43 (5) ◽  
pp. 509-518 ◽  
Author(s):  
J. P. MacKinnon
Keyword(s):  
Host Range ◽  
Myzus Persicae ◽  
Leaf Roll ◽  
Aphid Species ◽  
Latent Virus ◽  
Potato Leaf ◽  
Comparative Tests ◽  
Total Transmission ◽  
Virus Complex ◽  
Efficient Vector

Myzus persicae (Sulz.) transmitted a new virus to healthy Physalis floridana Rydb. from other P. floridana infected with a turnip latent virus complex. Symptoms were characterized by a chlorosis and sometimes cupping of only the lower leaves with slight stunting of plants. These symptoms could easily be mistaken for those incited by potato leaf roll virus but they were strikingly different from the yellow netting of plants infected with the turnip latent virus complex.In virus–vector studies with the new virus and M. persicae, an occasional aphid acquired the virus in 2 hours and 14% of infective insects transmitted it in 30 minutes. When acquisition and inoculation feedings were each increased to 48 hours, transmissions by single aphids of 70% and more were common. A few aphids transmitted the virus in a total transmission time of 30 hours, but most required 72 hours or longer to acquire, become infective, and transmit it.In comparative tests between the new virus and either potato leaf roll or the turnip latent complex, the new virus and potato leaf roll were recovered from plants 3 days after inoculation but the complex was not recovered for 14 days or longer. Of five aphid species tested, M. persicae was an efficient vector of all three viruses and the only species to transmit the new virus and the turnip latent complex. Plants infected with the new virus and showing symptoms were as easily infected with potato leaf roll as were comparable controls, but fewer of them became infected with the complex. The new virus and the complex were quite similar in host range, and susceptible plants were found in the Amaranthaceae, Chenopodiaceae, Cruciferae, and Solanaceae.The new virus is called mild chlorosis virus of P. floridana.

STUDY REGARDING THE APHIDOFAGOUS FAUNA STRUCTURE IN THE PEACH ORCHARDS FROM CONSTANTA COUNTY IN 2020

2020 ◽  
Vol 13 ◽  
pp. 110-114
Author(s):  
Andrei Chiriloaie-Palade ◽  
Mădălina Radulea ◽  
Gheorghe Lămureanu ◽  
Ștefan Ion Mocanu ◽  
Maria Iamandei
Keyword(s):  
Myzus Persicae ◽  
Management System ◽  
Green Peach Aphid ◽  
Aphid Species ◽  
Insect Species ◽  
Essential Component ◽  
Intensive Use ◽  
Predatory Insect ◽  
Predatory Insects ◽  
Aphid Populations

"The cosmopolitan aphid species Myzus persicae is a key pest of peach orchards in south and southeastern Romania. The phenomenon of resistance induced by the intensive use of insecticides is a matter of concern for farmers and protectionists, making necessary integrated measure for the control of this pest. Conservation of natural enemy’s populations is an essential component of any management system proposed for pest aphids. The aim of the study was to determine the structure of predatory insects associated with Myzus persicae populations in peach orchards. The research was carried out in three orchards from two localities from Constanta County, in peach plantations with Springcrest variety aged 7, 11 and 12 years. As a result of this study, there were determined a total of 15 predatory insect species belonging to eight systematic families: Coccinellidae, Chrysopidae, Hemerobiidae, Syrphydae, Cecidomyiidae, Panorpidae, Nabidae and Forficulidae, which naturally contribute to the reduction of the green peach aphid populations. "

scholarly journals Relative toxicity of some insecticides and azadirachtin against four crop infesting aphid species

1970 ◽  
Vol 27 ◽  
pp. 31-34
Author(s):  
M Khalequzzaman ◽  
Jesmun Nahar
Keyword(s):  
Myzus Persicae ◽  
Aphis Gossypii ◽  
Aphid Species ◽  
Aphis Craccivora ◽  
Lipaphis Erysimi ◽  
Relative Toxicity ◽  
Plant Origin ◽  
Residual Film ◽  
Aphis Gossypii Glover ◽  
Aphis Craccivora Koch

Indirect application was used to assay the toxicity of five insecticides; viz. malathion, carbosulfan, cymbush, imidacloprid and azadirachtin against four important crop infesting aphid species, Aphis craccivora Koch, Aphis gossypii Glover, Myzus persicae (Sulzer) and Lipaphis erysimi (Kaltenbach), reared on bean, brinjal, potato and cauliflower plants respectively. Residual film technique was applied by bringing leaves with tested aphids of the vegetable plants in the laboratory. Malathion was the least toxic to all aphids having LC50 as 327.97, 333.92, 305.26 and 313.77 μg cm-2 for A. craccivora, A. gossypii, M. persicae and M. persicae respectively. Cypermethrin was the most toxic showing LC50 as 12.55, 12.29, 12.55 and 12.10 μg cm-2 in the above mentioned species of aphid respectively. Carbosulfan and imidacloprid showed moderate toxicity. Azadirachtin as a natural plant origin insecticide proved to be the most toxic having LC50 as 0.41 μg cm-2 for A. craccivora, 0.34 μg cm-2 for A. gossypii and 0.44 μg cm-2 for both M. persicae and L. erysimi. Key words: Insecticide, toxicity, azadirachtin, Aphis craccivora, Aphis gossypii, Myzus persicae, Lipaphis erysimi   doi:10.3329/ujzru.v27i0.1950 Univ. j. zool. Rajshahi Univ. Vol. 27, 2008 pp. 31-34

The role of the color of the substratum on the initiation of the probing behavior in Myzus persicae (Sulzer) and Macrosiphum euphorbiae (Thomas) (Homoptera: Aphididae)

1990 ◽  
Vol 68 (4) ◽  
pp. 694-698 ◽  
Author(s):  
Yvan Pelletier
Keyword(s):  
Myzus Persicae ◽  
Green Peach Aphid ◽  
Lower Surface ◽  
Aphid Species ◽  
Macrosiphum Euphorbiae ◽  
Potato Leaf ◽  
Potato Aphid ◽  
Probing Behavior

Twenty-five colors were evaluated for their effect on the initiation of probing behavior in the green peach aphid, Myzus persicae (Sulzer), and the potato aphid, Macrosiphum euphorbiae (Thomas). The proportion of aphids of both species initiating probing behavior was maximum on green, yellow, or orange and lowest on purple, blue, white, or black. The time taken by individual aphids to begin probing was shorter for M. persicae than for M. euphorbiae but was essentially unaffected by colors. A larger proportion of both aphid species probed on the lower surface of potato (var. Kathadin) leaflet compared with the upper surface. The proportion of aphids initiating probing was the same on the lower surface of a potato leaf and on paper similar in color, indicating that the color of the substratum is determinant in the initiation of feeding for those aphids.

COMPARATIVE TRANSMISSION OF POTATO VIRUS Y BY FOUR APHID SPECIES THAT INFEST POTATO

1953 ◽  
Vol 31 (4) ◽  
pp. 333-341 ◽  
Author(s):  
R. H. E. Bradley ◽  
D. W. Rideout
Keyword(s):  
Feeding Behavior ◽  
Potato Virus ◽  
Myzus Persicae ◽  
Potato Virus Y ◽  
Tobacco Plant ◽  
Aphid Species ◽  
Vector Efficiency

Single aphids of four species were observed with a hand-lens until each had touched its proboscis once on a tobacco plant infected with potato virus Y and then once on a healthy tobacco plant. The time that the proboscis remained touching the plants in each case was recorded. This procedure required only a few minutes for each aphid, and sometimes it was completed in less than a minute. During this process, the successful transmissions of potato virus Y by single aphids of Myzus persicae (Sulz.), Aphis abbreviata Patch, Macrosiphum solanifolii (Ashm), and Myzus solani (Kltb.) were 55, 31, 9, and 4% respectively. Vector efficiency was not due to difference in feeding behavior of these species. When single infective aphids were transferred to a series of five plants at five-minute intervals, M. persicae caused more infections and remained infective longer than A. abbreviata.

scholarly journals Transmission of Moroccan watermelon mosaic virus (MWMV) by Aphids in Greece

Plant Disease ◽  
2016 ◽  
Vol 100 (3) ◽  
pp. 601-606 ◽  
Author(s):  
Elisavet K. Chatzivassiliou ◽  
Aristeidis P. Papapanagiotou ◽  
Panagiotis D. Mpenardis ◽  
Dionyssios Ch. Perdikis ◽  
George Menexes
Keyword(s):  
Mosaic Virus ◽  
Myzus Persicae ◽  
Aphis Gossypii ◽  
Common Species ◽  
Aphid Species ◽  
Watermelon Mosaic Virus ◽  
Efficient Vector ◽  
Probe Transmission ◽  
Macrosiphum Rosae ◽  
Mass Inoculation

The aphid-transmitted Moroccan watermelon mosaic virus (MWMV; Potyvirus, Potyviridae) is an emerging pathogen in cucurbit crops in the Mediterranean basin but information on its transmitting vector species is limited. This study aimed to record the competence of 22 species of the Greek aphid fauna to vector MWMV. Timed-probe transmission experiments and arena tests were performed using laboratory colonies of aphid species abundant in field surveys; less common species were tested as apterous individuals collected directly from field plants in mass-inoculation (nonpersistent) tests. Depending on the test, aphids were tested in cohorts of 10 or 20 individuals on zucchini (Cucurbita pepo L.) plants and the frequency of transmission was calculated for a single aphid. Among 12 species tested in timed-probe transmission tests, Myzus persicae nicotianae (74.0%) appeared to be the most efficient vector, followed by M. persicae (48.0%), Aphis gossypii (11.8%), an unidentified Aphis sp. (11.8%), and A. spiraecola (11.0%). Alatae of nine species tested in arena tests transmitted the virus in rates varying from 0.7 to 53.6%; M. persicae was the most efficient species in virus spread. In mass-inoculation tests, the probability that apterae of 12 aphid species collected from field plants transmitted MWMV fluctuated from 0.3 to 5.3%. No transmission was obtained by Brevicoryne brassicae. The following species are reported as new vectors of MWMV: A. fabae, A. nerii, A. spiraephaga, A. umbrella, Capitophorus eleaegni, Dysaphis (Pomaphis) pyri, Macrosiphoniella sanborni, Macrosiphum rosae, Myzocallis castanicola, Myzus persicae nicotianae, M. cerasi, M. varians, Phorodon humuli, Ovatus crataegarius, Takecallis arundicolens (first report in Greece), Uroleucon sonchi, and U. (Uromelan) aeneum. These results contribute to a better understanding of MWMV epidemiology.

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