lec 25 Flashcards
what is echinacea used for?
respiratory infection, fever, wounds, insect bites, and generally enhancing the immune system (N. America native, used by N. america indig peoples)
where is echinacea native to?
central and eastern plains of north america (alberta has good conditions for echinacea growth)
in echinacea, what part do we use? how long does it take to harvest?
we use the roots, which take 3-5 years to harvest
what does seedling blight/damping off look like in echinacea? how is it transferred?
disease where roots brown and seedlings wilt
transferred via bacteria spreading through an infected medium (soil), mostly caused by overwatering causing moist soil which bacteria thrives in
what does aster yellows look like in echinacea? how is it transferred?
aster yellows: disease where leaves become yellow or red and take on a ‘witches broom’ appearance (looks really sparse and unhealthy); flowers may develop phyllody and turn virescent + sterile
caused by a phytoplasma which is transferred via insect host
what does crown/bud/root rot look like in echinacea? how is it transferred?
buds grow weakly, root tips are destroyed, and the crown rots
caused by a bacteria that transfers via open wounds in the roots
what does sclerotinia stem rot look like in echinacea? how is it transferred?
black lesions form on the stem which later become bleached (WHITE MOLD); the stem becomes weak
transferred through the air (spores)
where is rhodiola native to?
northern europe, asia, north america
what is the most common species of rhodiola, and where is it native to?
most common species is Rhodiola rosea, which is native to russia and siberia
what does rhodiola do?
relieves emotional stress, depression, anxiety, menopausal symptoms, and improves physical endurance levels
also shortens recovery period following exercise
how is alberta for growing rhodiola?
rhodiola likes colder climates - alberta is pretty good in the winter
how long does it take to harvest rhodiola? what do we harvest?
about four to five years. we harvest the roots
what does seedling blight/damping off look like in rhodoiola? how is it transferred?
disease where roots brown and seedlings wilt
transferred via bacteria spreading through an infected medium (soil), mostly caused by overwatering causing moist soil which bacteria thrives in
what does aster yellows look like in rhodoiola? how is it transferred?
aster yellows: disease where leaves become red and take on a ‘witches broom’ appearance (looks really sparse and unhealthy)
caused by a phytoplasma which is transferred via insect host
what does crown/root rot look like in rhodoiola? how is it transferred?
buds grow weakly, root tips are destroyed, and the crown rots
caused by a bacteria that transfers via open wounds in the roots
