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a problem with the hop plant? It could be a variety of disease. Hops
are very resilient, but they are subject to a lot of viruses. Sometimes
it may be difficult to determine what it is. A fairly common problem is downy mildew.
This is a fungus that causes spikes to fail to grow in the springtime,
and can occur when the weather is warm, like at about 70 degrees, moist
and wet. This disease leaves infected spikes stunted and brittle, unable
to grow. However, this fungus will only infect your hop plant, not
other plants in the garden. If you see infected spikes, remove them
immediately and bury them in the ground. The leaves of a hop plant
infected with downy mildew will look malformed or curled, and will have a
grayish black fungus appear on the underside of the leaves. Hop cones
can become infected also if flowering occurs during warm, wet weather.
The cones will turn brown, quit growing or develop improperly. A copper
base product can be used to kill downy mildew. Your nursery should carry
products like this. Another common disease is powdery mildew.
This disease likes moist climates. In recent times, hops have been
subjective to this fungus. It looks like a white powder all over the
plant. Again, check with your nursery to get chemicals to fight this.
Sulfur is of some help. Viral disease could
cause a number of things to happen to the hop plant, depending on the
environment it is in. Yellow spots may appear on the leaves, growth may
be stunted, it could fail to grow upwards on its support system, or the
leaves and bines could look distorted. There is no cure should this
occur. These plants should be removed.
all hops will eventually get viruses. Commercially, whole fields will
have to be replaced with new plants do to virus and disease. Feel free
to go to a nursery and ask for products to keep disease under control.
But be sure to tell them though if you are planning on using the hops to
brew with, so that you can get something more organic. If you are
growing for ornamental purposes, use whatever you want to use. Rely on
your common sense. In addition, all the roots we sell are certified, and
unlikely to have a severe virus problem.
Aside from disease, problems with your hop plant could be a result of insects. Aphid and spider mite are very common. Aphids are
little green pests. They suck juices from plants and during flowering
they will enter the young hop cones, causing the cones to mold. They
usually are present during rapidly cool weather. Spider mites are
very small, have eight legs, and are a reddish color. Take a leaf and
hold a hand lens up to it in order to see them and their webs, if you
suspect Spider Mite. Shaking the leaf slightly will get the spider to
move across the leaf. They feed off the leaves and/or hop cones by
puncturing them and sucking out the plant sap. Punctures will leave a
small colored spot, eventually causing the leaf to shrivel and die, and
will cause hop cones to turn brown. In severe situations, the hop plant
will appear red due to this. Spider Mite can be a problem during long
times of hot and dry weather. You can help prevent this problem by
hosing off the leaves of the plant.
are subject to lots of pests and disease above and below ground.
Nematodes may attack the root system. Most common are caterpillars and
other common garden pests. Some insects though, such as the lady bug
which eats aphid, along with wasps and others can be beneficial to the
two functions for growing hops. One is for brewing purposes: the other
is for beauty, looks, and shade. Try both. Have any climbing flower
vines outside? Grow hops in with it. The contrasting colors will look
beautiful. Grow hops along fences any way you want. Hops can be trained
to grow sideways. Or you can grow a hop plant up a dead tree or around
an arbor. These are just some inspiring ideas. Good luck with your
More questions or checking availability? Call 919 850-0095 or send an email to firstname.lastname@example.org
We hope this serves to answer some of the questions you may have. Thank you.