Pest Alert: First Massachusetts find of daylily rust in 2005 (June
Daylily rust (Puccinia hemerocallidis) was found
on the daylily cultivar Twice as Nice in Cohasset,
MA in Norfolk County on June 28, 2005. Symptoms of
daylily rust were observed on 40 plants the nursery
received in a shipment last week. The infected plants
are being held under quarantine and treated with fungicide.
The other daylilies in this establishment are over
100 yards away and showed no sign of disease. An inspector
from the Massachusetts Department of Agricultural
Resources will continue to monitor the situation to
ensure the daylily rust will be controlled.
Daylily rust was first detected in four states in
the southeastern United States in 2000. As of June
2005, it was reported in a total of 28 states. In
2003 several cases were reported in Massachusetts
and in 2004 one case of daylily rust was reported.
Due to the limited number of cases of daylily rust
in Massachusetts it is possible to limit the spread
this disease in the state. If daylily rust is confirmed
on their plants, growers will be ordered to follow
quarantine procedures and treat infected plants.
Please inspect new stock coming into your nurseries
or gardens for symptoms of daylily rust. Raised orange-yellow
to red-brown pustules will appear on both the upper
and lower surfaces of the leaves infected with daylily
rust. If you rub a tissue along the surface of the
leaves, it will pick up the bright orange spores.
An isolation period of at least 6 months is recommended
to ensure the plants are free of daylily rust. The
Massachusetts Department of Agricultural Resources
is asking growers to report daylily rust via the MA
Introduced Pests website (http://www.massnrc.org/pests/report.aspx)
or via the plant pests and noxious weed hotline at
Please visit our daylily rust fact sheet to view
photos of daylily rust symptoms and for more information
about this disease. http://www.massnrc.org/pests/pestFAQsheets/daylilyrust.html
This pest alert is from the Massachusetts Introduced
Pests Outreach Project, a collaborative project between
the Massachusetts Department of Agricultural Resources
and the UMass Extension Agriculture and Landscape
Program aimed at preventing the establishment of new
pathogens and pests in Massachusetts. Visit the project
for more information on other emerging pests and to
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