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Rapid spread by mites of ryegrass mosaic virus from old sward to seedling ryegrass and its prevention by aldicarb
Author(s) -
GIBSON R. W.
Publication year - 1981
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.1365-3059.1981.tb01219.x
Subject(s) - biology , sowing , seedbed , aldicarb , agronomy , lolium multiflorum , seedling , colonisation , ecology , pesticide , colonization
SUMMARY In experiments in 1979 and 1980 in eastern England, the spread of eriophyid mites and ryegrass mosaic virus (RMV) from transplanted old sward through plots of newly sown Italian ryegrass greatly exceeded spread by windborne mites from outside the plots. During the summer and autumn of each year, mites and RMV spread at least one metre through the ryegrass (6/7 rows) from the old sward. Applying aldicarb (10 kg/ha equivalent) to the seedbed before sowing the Italian ryegrass prevented colonisation by mites and greatly decreased spread of RMV from old sward. It is concluded that old diseased swards should be completely killed before reseeding and that RMV is likely to spread quickly to plants slot‐seeded into old pastures. The use of acaricides might prevent this spread but would be costly.