Claim · model-written summary
Diseased lucerne has significantly decreased dry-weight yield in the second harvest year, often requiring ploughing-in before the third harvest.
- Taxon
- lucerne
Medicago sativae0 - Outcome
- dry‐weight yielde0
- Direction
- decreasee0
- Qualifier
- during the second harvest yeare0
Verbatim
e0“a significant decrease of dry‐weight yield of diseased lucerne occurs during the second harvest year: this often necessitates the ploughing‐in of badly wilted crops before they reach their third harvest.”
Title
Wilt of lucerne caused by species of Verticillium
J. B. HEALE; IVOR ISAAC Annals of Applied Biology 1963. doi:10.1111/j.1744-7348.1963.tb03768.x
Other claims from this paper (19)
- Observation All Verticillium albo‐atrum isolates from lucerne are virulently pathogenic to lucerne.
- Observation V. dahliae from lucerne is only slightly pathogenic to lucerne.
- Intervention effect Isolates of both fungi from other crop plants produce no symptoms after inoculation into lucerne, suggesting strain specialization.
- Observation Both lucerne strains can infect broad bean.
- Observation Both lucerne strains can infect strawberry.
- Observation Both lucerne strains can infect Italian clover.
- Observation Both lucerne strains can infect pea.
- Observation V. albo‐atrum may attack potatoes.
- Observation V. albo‐atrum may attack runner beans.
- Observation V. albo‐atrum rapidly spreads underground between lucerne plants, particularly at close spacing.
- Observation Resting mycelium in buried moribund lucerne remains viable for 9 months at 12 inches depth.
- Observation Resting mycelium in moribund lucerne remains viable for 7 months at 6 inches depth.
- Observation Resting mycelium in moribund lucerne remains viable for only 5 months at the surface.
- Observation V. albo‐atrum spreads from buried lucerne debris into adjacent soil and can be re-isolated for up to 9 months at 12 inches.
- Observation V. albo‐atrum can be re-isolated from soil adjacent to buried lucerne debris for 5 months at 6 inches.
- Association In pot experiments symptom development speed correlated with conidia contacting the lucerne root system.
- Observation Lucerne fungal isolates infect the listed common weeds and remain pathogenic to lucerne after re-isolation.
- Mechanism Norfolk field observations suggest harvesting machinery carries initial infection and subsequent crop spread.
- Association Disease incidence increases with lucerne stand age.