(
( .
END OF SEASON
REPORT
90/91
(
SUG 199.0/91
The Siratac User Group had 26 subscribers covering 36 farms this season. The final total of hectares using the service was 38.693 ha., being 161 Management Units (MU's}.
Reeional
hectares;VaritiifSi
Namoi Gwydir Macquarie Macintyre
St.
GeorgeWell there was a bit of everything.
Varieties grown: no. MU's
Siokra S324 DP90
Namoi
6
Gwydir 38 2 10
Macquarie 25 7
Macintyre 11 3
St. George 4
7,099 14,641 12,106
4,180 667 38.693 ha
Sicala SL22
4 3
7 10
2 2
1 5
1 1
CS189 CS6S 12
5 1
1
The Gwydir Valley had sufficient MU's to tally some averages and compare for new varieties.
A graph is overpage ...
Sprays:
Average sprays/ha
Namoi 9.6
Gwydir 9.7 Macquarie 9. 6 Macintyre 9. 7 St George 9.1
Generally over 50% of sprays were with Endosulfan or Endosulfan mixes. Pyrethroids accounted for around 10 to 17% of sprays, depending on the region. More use of Carbamates and
Profenofos, around 10% each, and sucking pest sprays at around 10%.
Insects;
A heavy year in some areas.
St George had some very high egg peaks, between 20 and 50, with a couple of records over the 100/m. Peaks of larvae around 3/m occurred 5 times.
In other regions, peaks of egg lays between 5 and 8 eggs/m, with lows of around 2 eggs/m, and larvae ranging between 1 and 2/m for most of the season. Gwydir experienced a build up in late March to 4 larvae/m, Macintyre a build up to 4/m in late February.
Weather:
Most sites followed the same pattem ... Wann and not too wet Most locations received average weather for October, followed by hotter weather in Nov/Dec with more daydegrees than average.
The rain in January seemed to bring the hot spell to an end. Most locations received around IOOmms of rain in January or February. or both. February/March was generally a litte wanner than average, and April closely mapping the average. April was a nice dry month for picking, with most areas receiving no rain at all.
I hope the season went well for you this year.
Regards, Carol Jeffries
200
150
100
50
"
- ... •
E- -
:Iu.
...
Gwydir - Siokra
200 average of 38 MU's
150
100
50
O+---~..-::::ii~"T"'""--...i~~~..---.
0 500 1000 1500 2000 2500 Day Degrees
~ Squares Green Bolls
• Open Bolls
Gwydir - DP90 Gwydir - Sicala
average of 10 MU's 200 average of 6 MU's
150
100
50
O+---:r-:=;'-"'.,..."T"'""---r--__.:....___. __ __, 0-t---"T"'""._ _______ __.T---L:llr---.
0 500 1000 1500 2000 2500 0 500 1000 1500 2000 2500
Gwydir M CS189
Gwydir - L22 average of 5 MU's
200 average of 10 MU's
( 50
100
50
0+---r---'--~---rlL---..,;:a..----.
0 500 1000 1500 2000 2500 0 500 1000 1500 2000 2500
VARIETY COMPARISONS IN THE GWVDJR
..
- E - E
~
ca: co
250
200
150
100
50
GWYDIR Sprays - Area Basis 1990/91
Endaaulfan 31.0%
Dime or O.meth 12.0%
Endo and Methomyl 1.0%
~=lilij~~~~~~~~~~~~~
Endo and Dime or Omath 6.0%
OPa (6+11+17+19+22) 6.0%
Endo and Others (INC OP9) 18.0%
Avar:aga number of sprays per ha"' 9.7 Slratac ha : 14641
Othara(16+26-29) 2.0%
Profanofo•
2.0%
\ . Pyr and Others 6.0%
MIDKIN Rainfall & Day Degrees
. .... · ··· ·
OCT
1990
... o··· ..
..
NOV
. . . · · .. e·· ··
DEC
JAN
1991
~ Rainfall 90191 D Day Degrees 90/91 0 Day Degrees Mean
FEB
MAR APR
600
500
400 Cl)
~
tn 300 ~ 200c ~
100
f,
e
6
4
2
Total Eggs Total Larvae
90/91 GWYDIR
HELIOTHIS PRESSURE
Medium +Large Larvaet
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