Soil Temperature a Key in Summer Annual Weed Germination
When soil temperatures reach 11 to 15C at the 10 cm depth crab
grass (Digitaria spp.) initiates spring germination. Crow
sfoot grass (Eleusine indica) germinates at slightly
warmer soil temperatures - between 15 and 19 C. Generally crow
sfoot grass will germinate 2 to 8 weeks after crab grass. If a
preemergent is to be applied, try applying just before temperatures
reach this range. If you know when crab grass germinates, an old
rule of thumb is to apply the pre-emergence h...
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Large Patch
Large Patch is a mid - to early spring
disease of warm season turfgrasses. Initially reported on
zoysiagrass, the disease was originally called Zoysia patch.
Subsequently the disease was diagnosed on multiple warm season
turfgrass, and for consistency purposes th...
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Anthracnose a problem this summer?
Anthracnose is a serious disease of winter grass (Poa
annua) putting greens and to a lesser extent creeping
bentgrass greens. This disease is especially severe on greens that
are under stress (heat, drought, intense management
regime)...
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Looking at a Few Late - Autumn / Winter Diseases
With cool wet weather slowly
beginning to move into some areas, it is a good time to look
forward to some of the common diseases that can be expected to
occur.
The first disease is Microdochium patch, also known...
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What do Golfers (and Panelists) Value in Course
Conditioning?
An Opinion
As I write this article on the eve of The Masters
Tournament at Augusta National Golf Club, USA, mass media attention
for the tournament has focused on Tiger Woods. There is little
doubt more p...
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Autumn Spring Dead Spot Management
A chronic and difficult disease to control of couchgrass is
Spring Dead Spot (SDS). Spring dead spot symptoms appear in late
winter/early spring when couchgrass begins growth or "green
up".
The circular patches of dead turfgrass normally 1...
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How Susceptible are Turfgrasses to Flooding
Heavy rains the past several weeks have
resulted in flooding along some of the coastal regions
of Australia.
At this time what does flooding do to
turf? Flooding injury as outlined by James B Beard in
Turfgrass: Science an...
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