Abstract
SUMMARY Cocksfoot mottle (CFMV) and Phleum mottle (PMV) viruses are both transmitted by the Chrystomelid beetles Ouletna melanopa and O. lichenis. Both viruses are readily inoculated into some cereals but only CFMV has ever been found causing a natural infection, in one wheat crop. The apparent absence of these viruses from cereals in the field results from inefficient transmission by the vectors and the existence of symptomless tolerance in cereals to both viruses, especially after tillering. In cereals symptom expression is related to virus concentration, and both may be influenced by light intensity and ambient temperature. O. melanopa , which is potentially the most important vector of the viruses to cereals, moves to winter‐sown cereals only when the virus‐tolerant growth stage has been reached, and later to spring‐sown cereals when they too have commenced tillering. Whereas the spread of these viruses within grass crops is increased by cutting and grazing, cereal crops are neither cut nor commonly grazed.
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Claims 7
Claim · model-written summary
Both viruses can be transmitted by two beetle species.
Verbatim
e0“Cocksfoot mottle (CFMV) and Phleum mottle (PMV) viruses are both transmitted by the Chrystomelid beetles Ouletna melanopa and O. lichenis.”
t0“cereals”
Claim · model-written summary
Both viruses readily inoculated some cereals.
Verbatim
e0“Both viruses are readily inoculated into some cereals but only CFMV has ever been found causing a natural infection, in one wheat crop.”
Claim · model-written summary
Only CFMV was found naturally infecting one wheat crop.
- Taxon
- wheat
Triticum aestivume0 - Interactor
- CFMVe0pathogen
- Outcome
- natural infectione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only CFMV has ever been found causing a natural infection, in one wheat crop.”
Claim · model-written summary
Inefficient vector transmission and symptomless tolerance after tillering explain apparent field absence.
Verbatim
e0“The apparent absence of these viruses from cereals in the field results from inefficient transmission by the vectors and the existence of symptomless tolerance in cereals to both viruses, especially after tillering.”
Claim · model-written summary
Cereal symptom expression was related to virus concentration.
Not reportedDirection
Verbatim
e0“In cereals symptom expression is related to virus concentration, and both may be influenced by light intensity and ambient temperature.”
Claim · model-written summary
Light intensity and ambient temperature may influence symptom expression and virus concentration.
Not reportedDirection
Verbatim
e0“In cereals symptom expression is related to virus concentration, and both may be influenced by light intensity and ambient temperature.”
Claim · model-written summary
O. melanopa reaches winter cereals at a virus tolerant stage and spring cereals after tillering starts.
Verbatim
e0“O. melanopa , which is potentially the most important vector of the viruses to cereals, moves to winter‐sown cereals only when the virus‐tolerant growth stage has been reached, and later to spring‐sown cereals when they too have commenced tillering.”