Ornamental flowering plants naturally infected with curly-top and aster-yellows viruses
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چکیده
منابع مشابه
Translocation of Photosynthate in Curly Top Virus-infected Tomatoes.
Photosynthate translocation in single leaflets of healthy and curly top virus-infected tomatoes was investigated using (14)C as a marker. The amount of radioactivity found in plant parts not exposed to (14)CO(2) was substantially lower in diseased than in healthy plants. The time lag for the appearance of (14)C in the petiole was considerably longer in the infected plants than in the healthy. T...
متن کاملThe aster yellows controversy: current status.
Evidence for and against the spiroplasmal etiology of aster yellows (AY) disease is examined. A spiroplasma, serologically identical to Spiroplasma citri, was cultivated by some workers from lettuce (Lactuca sativa L.) plants claimed to be naturally infected with AY. The isolated spiroplasma was shown to be infectious by injecting Macrosteles fascifrons with the cultured organisms and then conf...
متن کاملFactors influencing aster leafhopper (Hemiptera: Cicadellidae) abundance and aster yellows phytoplasma infectivity in Wisconsin carrot fields.
In Wisconsin, vegetable crops are threatened annually by infection of the aster yellows phytoplasma (AYp), the causal agent of aster yellows (AY) disease, vectored by the aster leafhopper, Macrosteles quadrilineatus Forbes. Aster leafhopper abundance and infectivity are influenced by processes operating across different temporal and spatial scales. We applied a multilevel modeling approach to p...
متن کاملOverwintering non-crop sources of aster yellows phytoplasma
Research Overview: This project is directed at further enhancing our present understanding of the epidemiology and overwintering biology of the aster yellows phytoplasma (AYp) with a focus on factors that influence its geographical distribution in the upper Midwest and spread into Wisconsin muck crops. Our current research program focuses on: 1) generating new information about the identity, ge...
متن کاملSerum protein alterations in goats naturally infected with Babesia ovis
This study was conducted to determine the electrophoretic pattern of serum protein in goats infected withBabesia ovis. Serum total protein was calculated and serum electrophoresis from 15 goats naturally infectedwith B. ovis as well as same number of healthy goats was performed. Microscopic examination of Giemsastained peripheral blood smears revealed B. ovis infection. The parasitological diag...
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ژورنال
عنوان ژورنال: Hilgardia
سال: 1934
ISSN: 0073-2230
DOI: 10.3733/hilg.v08n08p233