منابع مشابه
The 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 کاملPLANT-INSECT INTERACTIONS Seasonal Patterns of Aster Leafhopper (Hemiptera: Cicadellidae) Abundance and Aster Yellows Phytoplasma Infectivity in Wisconsin Carrot Fields
InWisconsin, vegetablecropsare threatenedannuallyby theasteryellowsphytoplasma (AYp), which is obligately transmitted by the aster leafhopper. Using a multiyear, multilocation data set, seasonal patterns of leafhopper abundance and infectivity weremodeled. A seasonal aster yellows index (AYI) was deduced from the model abundance and infectivity predictions to represent the expected seasonal ris...
متن کاملSeasonal patterns of aster leafhopper (Hemiptera: Cicadellidae) abundance and aster yellows phytoplasma infectivity in Wisconsin carrot fields.
In Wisconsin, vegetable crops are threatened annually by the aster yellows phytoplasma (AYp), which is obligately transmitted by the aster leafhopper. Using a multiyear, multilocation data set, seasonal patterns of leafhopper abundance and infectivity were modeled. A seasonal aster yellows index (AYI) was deduced from the model abundance and infectivity predictions to represent the expected sea...
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ژورنال
عنوان ژورنال: Canadian Journal of Plant Science
سال: 1957
ISSN: 0008-4220,1918-1833
DOI: 10.4141/cjps57-016