(turfgrass or vegetable) disease model setup with wd warning

Archive Weather Display Feature Suggestions
1

as turfgrass specialist i like to use the weather station to predict diseases for end-users (private owners, golf courses, farmers). for many diseases there are models using temp, huminity, degree days and so on. in the wd warning email there is is mildew, but how can we set up a system for other diseases? Who can help me

2

this i could do/add…
email me any formulas you have…that are needed…

a bit snowed under at the moment though with requests/fixes/ etc!
(but getting there day by day (it seems just when I think I have my head above water./…

3

Hi Brian,

when I can help you, please contact me. but in this way we could make your software more used by turfproducers and golf courses. I will make a plan to use your software, of course with a new license, in the stadium (football, fur the us people soccer) of Verona, Italy. And with a turf producer in Austria.

regards,

gerard

4

Hi
I will get to add this soon…
just been every busy lately (with meetings (i am a secratary of one meeting, chairperson of any), and milking cows (its herd testing this week,and there are 2 lots of herds i have to help with), so this weel not much time…
but I will get there :slight_smile:

5

i have done this now
it was alot of work
in a new 10.17p

6

thanks Brian, but where can I find it. I am just a simple Dutch boy and looked by email warnings, but did not find it or missed it!. will look again, but please help me.

thanks a lot,

cheers,

gerard

7

scroll right down, left hand side, under where was downy mildew
in the weather warning setup

8

I’ve just recieved a warning, could you please post the formula or conditions for this warning.
Cheers
Cyclone

9

Brian,

thanks a lot. it is working .

10

Brian,
Could you please post the formula for the turf disease?
Thanks
Cyclone

11

I can give you the set up of the disease models ( sent to you by email 2-3 weeks ago), but Brian did the data programming work in wd.

12

please. could you send it also to me?

Thank you!

13

meteofrog …could you share those files with me please??

14

here they are:
Hi Brian,

This is a good one:

Brown Patch (Schumann Model)

Criteria :

  • Mean Soil Temp > 70 F;
  • Low Soil Temp > 64 F;
  • Avg. Temp > 68 F;
  • Low Temp > 59 F;
  • Rel. Hum. > 95% for 10 hours;
  • Rain > 0.1 inches;
  • “Yellow” Alert when 3 factors met;
  • “Orange” Alert when 4 or 5 factors met;
  • “Red” Alert when 6 factors met;
  • Alert canceled if Low Temp < 59 F in next 2 days.

Reference : Schumann, Clarke, Rowley, and Burpee Model - 1994

And this one:

Dollar Spot (IT Modified Mills and Rothwell)

Criteria :
Rel. Hum. >= 90% during any 3 days of a 7 day period and:

  • “Orange” Alert when Average Temp >= 62 F and < 65 F;
  • “Orange” Alert when Average Temp > 80 F;
  • “Red” Alert when Average Temp >= 65 F and <= 80 F.

Reference : Mills and Rothwell Model - 1982 w/ InteractiveTurf
Modification

if I can help you., please let me know.

Kind regards,

Gerard

And this one:

On 9/19/04 10:58 PM, “Brian Hamilton” [email protected] wrote:

hi
which one(s) did you want added?
which is the most important?
Cheers
Brian
----- Original Message -----
From: “gerard van 't klooster” [email protected]
To: “Brian Hamilton” [email protected]
Sent: Friday, September 10, 2004 5:33 PM
Subject: Turfgrass disease models

Brian see here some models I found.

Kind regards

Gerard

Anthracnose (foliar) on Poa annua

Criteria :

  • ASI =
    4.0233-0.2283LW-0.5308AT-0.0013LW^2+0.0197AT^2+0.0155*(LW*AT);
  • where AT = average daily temperature (C) for a 3 day period;
  • where LW = average hours of Leaf Wetness for the same period;
  • “Yellow” Alert when ASI < 2;
  • “Orange” Alert when ASI >= 2 and < 3;
  • “Red” Alert when ASI >= 3.

Reference : Danneberger, Vargas, and Jones Model - 1984

Black Ataenius

Criteria :

  • “Red” Alert: adult egg laying when Temp Degree Days (DD54) = 100 thru
    150;
    Action: Time treatment if needed.
  • “Red” Alert: for damage from 1st generation grubs
    when Temp Degree Days (DD50) = 1100 thru 1160;
    Action: Time treatment if needed.

Reference : None.

Brown Patch (Schumann Model)

Criteria :

  • Mean Soil Temp > 70 F;
  • Low Soil Temp > 64 F;
  • Avg. Temp > 68 F;
  • Low Temp > 59 F;
  • Rel. Hum. > 95% for 10 hours;
  • Rain > 0.1 inches;
  • “Yellow” Alert when 3 factors met;
  • “Orange” Alert when 4 or 5 factors met;
  • “Red” Alert when 6 factors met;
  • Alert canceled if Low Temp < 59 F in next 2 days.

Reference : Schumann, Clarke, Rowley, and Burpee Model - 1994

Brown Patch (Fidanza Model)

Criteria :

  • E = -21.5+(0.15RH)+(1.4LT)-(0.033*LT^2);
  • where RH = Rel. Hum.;
  • where LT = Low Temp (C);
  • “Orange” alert when >= 4.5 and < 6.0;
  • “Red” Alert when E >= 6.0.

Reference : Fidanza, Dernoeden, and Grybauskas Model - 1996

Crabgrass – [Discontinued]

Criteria :

  • “Red” Alert when Soil Temp > 55 F for 4 consecutive days;
  • Alerts for days 4 thru 8 then no more during the year.

Reference : None.

Crabgrass (Fidanza Model)

Criteria :

  • “Orange” Alert corresponds to the first Crabgrass emergence
    when Soil Degree Days (sDD54) reach 42 thru 78;
  • “Red” Alert corresponds to a major emergence period between 140 thru
    230 sDD50.

Reference : Fidanza, Dernoeden, and Zhang Model - 1996

Dollar Spot (Hall Model) – [Discontinued]

Criteria :

  • “Red” Alert when Rain and Avg. Temp >= 22 C (71.6 F) for 2 days; or
  • “Red” Alert when Rain and Avg. Temp >= 15 C (59 F) for 3 days.

Reference : Hall Model - 1984

Dollar Spot (Mills and Rothwell)

Criteria :

  • “Red” Alert when High Temp >= 25 C (77 F) and
    Rel. Hum. >= 90% during any 3 days of a 7 day period.

Reference : Mills and Rothwell Model - 1982

Dollar Spot (IT Modified Mills and Rothwell)

Criteria :
Rel. Hum. >= 90% during any 3 days of a 7 day period and:

  • “Orange” Alert when Average Temp >= 62 F and < 65 F;
  • “Orange” Alert when Average Temp > 80 F;
  • “Red” Alert when Average Temp >= 65 F and <= 80 F.

Reference : Mills and Rothwell Model - 1982 w/ InteractiveTurf
Modification

Japanese Beetle

Criteria :

  • “Yellow” Alert when Temp Degree Days = 1050 thru 1180;
    corresponds to the first adult emergence.
  • “Orange” Alert when Temp Degree Days = 1590 thru 1925;
    corresponds to 90% adult emergence;
    Action: Treat ornmentals or trees as ncessary.
  • “Red” Alert 10 to 14 days after “Orange” Alert;
    corresponds to emergence of larvae.

Reference : None.

Poa seedhead

Criteria :

  • “Red” Alert when adjusted Temp Degree Days (DD) = 50 thru 100;
  • Reset DD when Low Temp < 32 F and DD < 50.

Reference : None.

Pythium

Criteria :

  • “Orange” Alert when High Temp > 86 F and Low Temp > 68 F;
  • “Red” Alert when Rel. Hum. >= 90% for >= 9 hours.

Reference : Nutter, Cole, and Schein Model - 1983

Summer Patch

Criteria :

  • “Yellow” Alert when Soil Temp >= 65 F for 3 consecutive days;
    Action: Preventative application where necessary.
  • “Orange” Alert when High Temp > 88 F and Soil Temp > 75 F;
    Possible symptom development.
  • “Red” Alert when Rain > 0.1 inches.
    Possible symptom development.

Reference : None.

Take-All Patch

Criteria :

  • “Yellow” Alert when Soil Temp >= 55 F for 3 consecutive days;
    Action: Preventative application where necessary.
  • Alerts for days 4 thru 8 then no more during the year.

Reference : None.

Tent Caterpillar

Criteria :

  • “Red” Alert when Temp Degree Days (DD) = 192 thru 363;
    Caterpillars start to become active.

Reference : None.