Results 21 to 30 of about 29,697 (193)
Characterization of Aster Yellows Phytoplasma Affecting Cycas revoluta in Egypt [PDF]
Journal of Plant Protection and Pathology, 2018 In 2015, Pale yellowing symptoms were observed on Cycas revoluta (family: Cycadaceae) leaves rachis and lamina grown as ornamental plant in gardens of the Alexandria Governorate, Egypt. Since the symptoms were suggestive the phytoplasma presence, samples
I. Behiry
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بررسی فراوانی برخی بیمارگرهای همراه با بیماری سرارغوانی سیبزمینی [PDF]
Majallah-i ḥifāẓat-i giyāhān, 2020 در برخی مزارع سیبزمینی نشانههای پژمردگی همراه با سرارغوانی، ریزبرگی، زردی و لولهای شدن برگ، تورم جوانههای جانبی و غدههای هوایی مشاهده میشود. بررسی460 نمونه جمعآوری شده از مزارع سیبزمینی استانهای چهارمحال و بختیاری، همدان و فارس طی سالهای1390 ...
عزیز باقری +1 more
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Plant Protection Science, 2023 Grape hyacinths are popular perennial, flowering bulbous plants. In 2018, 2019, and 2020, some plants of three Muscari species showed symptoms similar to those associated with phytoplasma infection in commercial ornamental gardens in Hungary.
Emese Mergenthaler +3 more
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Evidence on Possible Mycoplasma Etiology of Aster Yellows Disease II. Suppression of Aster Yellows in Insect Vectors [PDF]
Infection and Immunity, 1970 Chlortetracycline or chloramphenicol (but not kanamycin, penicillin, or erythromycin), when administered in hydroponic solution to diseased aster, reduced the availability of the aster yellows (AY) agent to nymphs of Macrosteles fascifrons (Stål).
R F, Whitcomb, R E, Davis
openaire +2 more sources
INCUBATION PERIOD OF ASTER‐YELLOWS VIRUS
American Journal of Botany, 1953 THE ASTER-YELLOWS VIRUS alternates in nature between plant and insect vector hosts. The multiplication of the virus in these two hosts has been demonstrated experimentally and it therefore seems justified to use the term incubation period in preference to latent period or delay of infectivity.
Henry H. P. Severin, Norman W. Frazier
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Multigene characterization of aster yellows phytoplasmas infecting grapevine in South Africa [PDF]
, 2015 The genetic diversity of aster yellows phytoplasmas in grapevine collected in two locations in South Africa (Vredendal and Robertson) was investigated by the use of multilocus analysis of gene sequences amplified by polymerase chain reaction.
CONTALDO, NICOLETTA +4 more
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Weed hosts of phytoplasmas in the Czech Republic
Plant Protection Science, 2002 The research was focused on wild plants that represent possible sources of phytoplasma infection. Thirteen species of wild herbaceous plants with symptoms of shoot proliferation, phyllody, virescence, sterility or yellowing have been collected from ...
P. Válová +5 more
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Molecular characterisation of phytoplasmas infecting roses in Poland
Acta Agrobotanica, 2013 Symptoms of shoot dieback and leaf yellowing followed by leaf chlorosis were observed in naturally infected roses 'Frisco' and 'Suela', cultivated in a commercial greenhouse in Poland.
Hanna Śliwa +2 more
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Detection and molecular characterization of phytoplasmas infecting apple trees in Poland
Horticultural Science, 2014 During 2010-2012, samples from 225 apple trees growing in six regions of Poland were tested for phytoplasmas. 16S rRNA gene and 16S-23S spacer region sequences were amplified from total DNAs prepared from phloem tissue of apple shoots.
M. Cieślińska, D.E. Kruczyńska
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Phytopathologia Mediterranea, 2020 Phytoplasma symptoms, including proliferation, witches’ broom, leaf rolling and yellowing, were observed in jujube (Ziziphus jujube) nurseries in the East of Iran.
Ghobad BABAEI +3 more
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