Chrysanthemums are a fall favorite, growing in combination with asters, pumpkins, and decorative winter squash, often displayed on bales of hay. Healthy plants fully flower and remain beautiful for several weeks with minimal care…unless the plants are hit by foliar nematodes (Aphelenchoides ritzema-bosi).
Foliar Nematodes on Chrysanthemum
What are foliar nematodes? They are
tiny, unsegmented roundworms that swim in a film of water, according to pest
information. Lesions appear and bottom leaves turn yellow and brownish,
dropping when infected.
Chrysanthemum foliar nematodes move
up the stem, to higher leaves and the process continues. If you see this issue
occurring on your mums, remove bottom leaves that are dying and avoid overhead
watering.
Treat healthy leaves that remain
with a spray of insecticidal soap to decrease the nematode population. If
desired, this might be a good time to replant into fresh soil. Nematodes often
overwinter in soil and become active when watering begins, especially when
water touches the leaves. Dispose of potentially infected soil by getting it
off your property.
Treating Foliar Nematodes on Mums
It is prudent to begin foliar
nematode treatment before damage appears. Check new plants when you bring them
onto your property and seclude them for a few days, away from your other
plants. This is a good practice for all new plants and a good way to avoid pest
and disease infestations among your existing plants.
Also, avoid all overhead watering
of plants and water at the roots when you can. Allow space between plants for
air circulation, also necessary to keep plants healthy.
If your plants already show
symptoms of foliar nematodes on chrysanthemums, follow the tips above. When
spraying with insecticidal soap, make sure the sun is not shining on the plant.
You may also treat with neem oil.
If you use a greenhouse for
overwintering plants, keep in mind that these nematodes may live on weeds
growing there. Foliar nematodes infect more than 200 different plant varieties.
Once you put these tips into practice, you’ll have healthy, long blooming mums for your autumn display. Your other plants may benefit too.
Chrysanthemums are a fall favorite, growing in combination with asters, pumpkins, and decorative winter squash, often displayed on bales of hay. Healthy plants fully flower and remain beautiful for several weeks with minimal care…unless the plants are hit by foliar nematodes (Aphelenchoides ritzema-bosi).
Foliar Nematodes on Chrysanthemum
What are foliar nematodes? They are
tiny, unsegmented roundworms that swim in a film of water, according to pest
information. Lesions appear and bottom leaves turn yellow and brownish,
dropping when infected.
Chrysanthemum foliar nematodes move
up the stem, to higher leaves and the process continues. If you see this issue
occurring on your mums, remove bottom leaves that are dying and avoid overhead
watering.
Treat healthy leaves that remain
with a spray of insecticidal soap to decrease the nematode population. If
desired, this might be a good time to replant into fresh soil. Nematodes often
overwinter in soil and become active when watering begins, especially when
water touches the leaves. Dispose of potentially infected soil by getting it
off your property.
Treating Foliar Nematodes on Mums
It is prudent to begin foliar
nematode treatment before damage appears. Check new plants when you bring them
onto your property and seclude them for a few days, away from your other
plants. This is a good practice for all new plants and a good way to avoid pest
and disease infestations among your existing plants.
Also, avoid all overhead watering
of plants and water at the roots when you can. Allow space between plants for
air circulation, also necessary to keep plants healthy.
If your plants already show
symptoms of foliar nematodes on chrysanthemums, follow the tips above. When
spraying with insecticidal soap, make sure the sun is not shining on the plant.
You may also treat with neem oil.
If you use a greenhouse for
overwintering plants, keep in mind that these nematodes may live on weeds
growing there. Foliar nematodes infect more than 200 different plant varieties.
Once you put these tips into practice, you’ll have healthy, long blooming mums for your autumn display. Your other plants may benefit too.