Issue no. 6 of the Home, Yard & Garden Newsletter is now available
IN THIS ISSUE:
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Oak Leaf Blister
Oak leaf blister has
started to appear on oak trees on the Illinois. This disease is caused
by the fungal pathogen, Taphrina
caerulescens. Members or the red oak group are more commonly affected by the disease. Symptoms are
distinctive, and appear as scattered blister-like, puckered, or raised areas on the leaves.
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Mushrooms Growing in
Turf
Wet spring weather has provided an excellent environment
for mushrooms. They can form wherever
sufficient moisture and organic matter is
present. When found growing in turf, mushrooms tend to stand out and be unsightly to some. The fungi responsible for
producing the mushrooms live off organic
matter in the soil, such as decaying tree roots or buried construction debris.
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Anticipation... of
Tomato Diseases
Tomatoes! We all love them but you need to anticipate that disease
issues can quickly arise. Now is a good
time to review common disease and environmental issues that may arise with the tomato plants. Some issues may be
in the form of foliar diseases or even
environmental mayhem, so it's a good idea
to keep in mind some examples of what to look for and what options
are available for treatment.
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Modified Growing
Degree Days (Base 50°F, March 1 through June 5)
Insect development is temperature dependent. We can use
degree days to help predict insect emergence and activity. Home, Yard, and
Garden readers can use the information
in this article to determine what insect
pests could be active in their area.
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Invasive Species ALERT: Viburnum Leaf Beetle
We've shared
several articles in in the Home, Yard, and Garden Pest Newsletter about the viburnum leaf beetle. Up until the last 2
weeks, we've only had a couple of
isolated reports of viburnum leaf beetle in the state, in both DuPage
and Cook counties. Over the past couple
of days, several reports of severe defoliation
caused by viburnum leaf beetle have come in from these same two
counties.
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Periodical Cicada
Periodical cicadas
should be emerging in northwestern Illinois. This is the Iowa brood, also known as Marlatt's Brood III, that
covers most of the southern two-thirds
of Iowa. It extends into Illinois, being present in Henderson, Warren,
Knox, Fulton, and Schuyler counties. It
has a disjunct area in northern DeWitt, and
northwestern Champaign counties.
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Buffalo Gnats
We have received reports of large numbers of buffalo gnats, also known as black flies, attacking
people particularly in western Illinois.
Buffalo gnats are small, 1/16- to 1/8-inch-long, humpbacked black flies. They bite exposed skin, typically
leaving a small, red welt. When the
gnats are numerous, the toxins from their bites can kill poultry and
other birds.
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Bagworm
Bagworms will have hatched in southern Illinois.
They should hatch by mid-June in central
Illinois. When newly hatched bagworms
emerge from their mother's bag, they climb to the top of shrubs, trees,
and any other erect object. They spin
out two to three feet of silk which catches in
the wind and blows them to new locations.
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