5 february 2020 (cc4) weather...–5 february 2020 (cc4) ... v v v v v v v v v v c c c c c c c c c c...
TRANSCRIPT
DATE – 5 February 2020 (CC4)
CROP STAGE –
• Early flower
• 4-7 NAWF
• Bollfill
• cutout
DISEASE -
• Fusarium
• Verticillium
INSECTS/BENEFICIALS -
• Mirids increasing in numbers.
Chemical control in some areas has
been needed
• Red blue beetles/apple dimpling
bugs/ low spider numbers and jassids
• Very low whitefly numbers
• The odd aphid
WEEDS -
• Laybys have worked well
• Plenty around after rain
• Vines are proving difficult to kill
WEATHER -
• Hot and humid
• Patchy rain
• 100-200 mm depending on location
• Rain will be beneficial for later
planted crops
• Cloudy weather has induced fruit
loss in lower canopy
OTHER -
• Some overland and river pumping has occurred
• Mungbeans, sorghum and corn being planted in
areas with enough moisture
• Some crops are quite ‘leggy’ with Pix being
applied
• Irrigation due, but more rain needed
• Outlook improved for some
Regards, Annabel Twine
Regional Extension Officer Darling Downs M 0447 176 007
E [email protected] W www.cottoninfo.com.au
General guide only, not comprehensive or specific technical advice. Circumstances vary from farm to farm. To the fullest extent permitted by law,
CSD expressly disclaims all liability for any loss or damage arising from reliance upon any information, statement or opinion in this presentation or from any
errors or omissions in this document.
DATE – 21 February 2020 (CC5)
CROP STAGE –
• 24-26 nodes
• Mid flowering – 10nacb
• 5 nawf to cutout
DISEASE -
• Fusarium
• Minor verticillium
• Minor/moderate boll rot
INSECTS/BENEFICIALS -
• Red and blue beetles
• Mirids low to building in numbers
• Increasing number of cotton stainers
• SLWF hot spots but numbers on the
rise
• Harlequin bugs
WEEDS -
• Plenty of weeds after rain
• Very high germination of Feathertop
Rhodes grass
WEATHER -
• humid
• wet and cloudy
• Cloudy weather has induced fruit
loss in lower canopy
OTHER -
• Outlook improved somewhat
• Crops have gone from a DISASTER to good
potential
• Pix being used in some crops
Regards,
Annabel Twine Regional Extension Officer Darling Downs
M 0447 176 007 E [email protected] W www.cottoninfo.com.au
General guide only, not comprehensive or specific technical advice.
Circumstances vary from farm to farm. To the fullest extent permitted by law, CSD expressly disclaims all liability for any loss or damage arising from reliance
upon any information, statement or opinion in this presentation or from any errors or omissions in this document.
DATE – Week Ending 7 February 2020
St George
Day degree accumulation for the current season is tracking closely to that from last season.
# First flower and Open Boll estimates Base 12 adjusted for cold shock days from this season (19/20).
For more information on Day degrees and the change in the measurement base, visit the CSD website via this link.
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Day Degree Accummulation - St George
Base 12 19/20 DD1532 19/20 Base 12 18/19
DD1532 18/19 First Flower Base 12 # First Flower Base 1532
Open Boll Base 12 Open Boll DD1532
CROP STAGE - • Crops ranging from peak flower to approx. 10% open boll with some crops being managed for cut out and water
availability. Some first fruiting position loss reported – attributed to hot temperatures and some cloudy days.
INSECTS/BENEFICIALS - • Pest pressure remains low in general for the stage of season.
• Mirid numbers variable and building towards repeat control measures.
• SLW building and some sprays applied – waiting to see effectiveness of these.
• Low thrip numbers on some earlier blocks and an absence of mites and aphids.
• No “escapee” helicoverpa larvae observed as yet.
• Beneficial numbers remain high
WEEDS - • Under control.
DISEASE - • Low levels of fusarium in blocks with prior history however expression limited – not favoured by seasonal conditions.
GENERAL COMMENTS -
• A minor flow into Beardmore dam will see a small amount of water allocated to irrigators. This combined with forecast
rain will assist with some of the mid to late crops that are being managed for the impact of high heat and dwindling
irrigation water supply.
MacIntyre
Day degree accumulation for the current season is tracking closely to that from last season.
# First flower and Open Boll estimates Base 12 adjusted for cold shock days from this season (19/20).
For more information on Day degrees and the change in the measurement base, visit the CSD website via this link.
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Day Degree Accummulation - Goondiwindi
Base 12 2019/20 DD1532 2019/20 Base 12 2018/19
DD1532 2018/19 First Flower Base 12# First Flower DD1532
CROP STAGE - • Crops ranging from peak flower to cut out.
INSECTS/BENEFICIALS - • Moderate mirids and most crops treated once or twice.
• SLW building with treatment expected mid-February at current development rates.
WEEDS - • Under control and row closure achieved on most crops.
DISEASE - • Low level fusarium and verticillium evident on the heavier soils with history.
GENERAL COMMENTS - • Mediocre rainfall for first week of month. Cloudy weather causing fruit shed on susceptible crops. Sweating on
current rain forecast to deliver prospects for winter crop and following summer irrigation water supply.
The CottonInfo Bug Check is a summary of cotton crop information gathered from consultants by each CottonInfo Regional
Extension Officer (REO) for their valley. This information is collected on a regular basis to share with growers, researchers
and other consultants. It should be noted that the information is just a snap shot in time. It does not claim to be a thorough
report for each valley, just a summary of comments received.
DATE – Week Ending 24 January 2020
St George
Day degree accumulation for the current season is tracking closely to that from last season.
# First flower and Open Boll estimates Base 12 adjusted for cold shock days from this season (19/20).
For more information on Day degrees and the change in the measurement base, visit the CSD website via this link.
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Dec
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Day Degree Accummulation - St George
Base 12 19/20 DD1532 19/20 Base 12 18/19DD1532 18/19 First Flower Base 12 # First Flower Base 1532Open Boll DD1532 Open Boll Base 12
CROP STAGE - • Crops ranging from first flower to open boll with some crops being managed for cut out. Retention average to
good.
INSECTS/BENEFICIALS - • Pest pressure remains low in general.
• Mirid sprays applied or due soon and some pre-emptive applied with other field operations.
• Adult SLW building with one consultant expecting to spray soon.
WEEDS - • Under control.
DISEASE - • Low levels of fusarium in blocks with prior history however expression limited – not favoured by seasonal
conditions.
GENERAL COMMENTS - • Areas have been dropped out to match remaining irrigation water supply. Some minor shedding possibly
related to dust. “Parrot beaking” of bolls noted in some crops most likely due to high temperatures
during flowering.
MacIntyre
Day degree accumulation for the current season is tracking closely to that from last season.
# First flower and Open Boll estimates Base 12 adjusted for cold shock days from this season (19/20).
For more information on Day degrees and the change in the measurement base, visit the CSD website via this link.
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Day Degree Accummulation - Goondiwindi
Base 12 2019/20 DD1532 2019/20 Base 12 2018/19
DD1532 2018/19 First Flower Base 12# First Flower DD1532
CROP STAGE - • Most crops approaching cut out although some late plant behind this.
•
INSECTS/BENEFICIALS - • Moderate mirids and most crops treated once.
• SLW building but treatment not expected within the next week.
WEEDS - • Under control.
DISEASE - • Low level fusarium on the historic heavier soils – pretty normal.
GENERAL COMMENTS - • Rainfall variable ranging from 25-125mm in local area over past fortnight. Along with softer weather this
has been useful to crops.
The CottonInfo Bug Check is a summary of cotton crop information gathered from consultants by each CottonInfo
Regional Extension Officer (REO) for their valley. This information is collected on a regular basis to share with
growers, researchers and other consultants. It should be noted that the information is just a snap shot in time. It
does not claim to be a thorough report for each valley, just a summary of comments received.
DATE – 31st January 2020
Day Degrees – Moree, 1 Nov – 30 Jan
Accumulated Day Degrees 2019 DD 1532, 2018,
2017, 2016 & 10-year average (2010-2019) DD
1532 compared to 2019 Base12
Source: https://www.csd.net.au/ddc Seasonal Comparison Summary 1 Nov – 30 Jan
1 Nov –
30 Jan 2019 2018 2017 2016
10 year mean 2010-2019
Base 12 1457.2 1429.8 1334.8 1411.2 1323.2
DD1532 923.4 931.9 860.6 896 863.6
Cold shock days 5 2 3 8 2.9
Days above 36°C
51 41 36 41 29.6
Nights above 25°C
17 8 8 11 6.1
Days above 40°C
14 11 5 13 6.7
Average temperature
(°C) 27.9 27.7 26.6 27.4 26.5
Source: https://www.csd.net.au/ddc
CROP STAGE - 23 to 26 Nodes
9 NAWF to Cutout
Good retention, although some shedding 2nd
and 3rd position fruit with recent rain and
cloudy weather
Pix applications common
INSECTS/BENEFICIALS - Low numbers Mirids, Thrips. Some Mirid
sprays, mostly Fipronil, but some fields no
sprays.
SLW increasing. Pyriproyfen applied to some
fields and waiting to see results. Nymphs
present and some parasitism evident,
Beneficial numbers good, mostly Red and
Blue Beetles and Spiders.
WEEDS - Nothing reported, canopy closure
DISEASE - Some Verticillium and Fusarium in known
areas.
GENERAL COMMENTS - All Moree irrigated cotton crops got under
recent rain 40-100mm.
What the consultants are saying: Advanced crops 25 – 26 nodes, 6NAWF, late
crops 20 -22 nodes, 9NAWF, all pests very quiet,
beneficials 7-8/m.
Significant fruit shed requiring multiple Pix
applications. Total Pix up from normal. Fruit load
should have checked growth but fruit shed
taking the brakes off crop.
SLW slowly rising, 5% parasitism in one field
25 nodes, odd mirid, retentions still high so no
sprays yet. Some shedding with rain and
overcast conditions last week. Seeing more
vegetative branches than usual.
Disease pressure very low at this stage. Will
monitor alternaria to see if it develops with
showery weather and cooler days next week,
given early incidence in the valley
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2019 Base 12 2019 DD1532
2018 DD1532 2017 DD1532
2016 DD1532 Average 2010-2019 DD1532
The CottonInfo Bug Check is a summary of cotton crop information gathered from consultants by each CottonInfo Regional Extension Officer (REO) for their valley. This
information is collected on a regular basis to share with growers, researchers and other consultants. It should be noted that the information is just a snap shot in time.
It does not claim to be a thorough report for each valley, just a summary of comments received.
DATE – 24th February 2020
Day Degrees – Moree, 1 Nov – 23 Feb
Accumulated Day Degrees 2019 DD 1532, 2018,
2017, 2016 & 10-year average (2010-2019) DD
1532 compared to 2019 Base12
Source: https://www.csd.net.au/ddc Seasonal Comparison Summary 1 Nov – 23 Feb
1 Nov –
23 Feb 2019 2018 2017 2016
10 year mean 2010-2019
Base 12 1810.6 1826.5 1711.7 1856.9 1687.5
DD1532 1164.4 1190.8 1101.7 1176.5 1106.4
Cold shock days 5 2 3 8 2.9
Days above 36°C
59 55 48 59 37.7
Nights above 25°C
21 11 9 21 8.8
Days above 40°C
14 12 11 21 8.4
Average temperature
(°C) 27.7 27.9 26.8 28.1 26.7
Source: https://www.csd.net.au/ddc
CROP STAGE – 23 - 28 Nodes, cutting out, most have already
cutout, plenty of shedding, pix applications.
INSECTS/BENEFICIALS - SLW generally low numbers, starting to build in
some fields.
Nymphs present and parasitism evident.
Mirids present, but low numbers
Apple dimpling bug – few to moderate
Mites in some fields, but very low numbers
Beneficials present in good numbers
DISEASE - Fusarium and Verticillium present with the cool, wet
weather.
Boll rot starting to show
Little bit of alternaria
GENERAL COMMENTS - Have been using Canopy Temperature Sensors,
which clearly shows the crop getting stressed even
though it has access to water on days with high
humidity.
What the consultants are saying: “Crops slowly approaching cutout but definitely
lingering around 4-5 NAWF due to earlier fruit loss.
May require late pix. It’s getting late and crops 2-3
weeks later than where they should be”.
“Shedding has been very high in some fields
especially where irrigation was followed by significant
rain”.
“Has been lots of shedding, now a very uneven crop,
with some plants with regrowth and others not)”
“Hayati (SLW parasite) present, SLW very low”.
“SLW starting to build again, admiral applied a month
ago”
“SLW all been sprayed with Admiral now, a few
nymphs, odd mites (very light numbers), cotton
strainers, plenty of beneficials”
“SLW quiet with parasites on the increase. No
admiral. Some mirids about”
“Fusarium present with the cool, wet weather, will
impact yield, odd plant with Vert, but not too bad”
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2019 Base 12 2019 DD1532
2018 DD1532 2017 DD1532
2016 DD1532 Average 2010-2019 DD1532
The CottonInfo Bug Check is a summary of cotton crop information gathered from consultants by each CottonInfo Regional Extension Officer (REO) for their valley. This
information is collected on a regular basis to share with growers, researchers and other consultants. It should be noted that the information is just a snap shot in time.
It does not claim to be a thorough report for each valley, just a summary of comments received.
DATE – CROP CHECK 15st Jan to 1st Feb 2020
Season Summary
Average day degree accumulations are sitting
close to last season overall. Forbes is sitting a bit
higher than last season, however the nights
above 25°C are 60% less than last season which is
a good thing, some patchy rain in some areas.
In Narromine the Base 12 & 1532 are slightly less
than 2017/2018 season, and nights above 25°C
are reduced by 42% compared to last season. Hot
days are slightly higher at Geurie as are nights
above 25°C overall the base 12 is slightly higher
than last season and 1532 is lightly lower.
REGION – FORBES
Fig 1. Day Degree season summary: Source https://www.csd.net.au/ddc/results
Fig 2. Day Degree comparison using the base 12 and 1532. Source www.csd.net.au/ddc
CROP STAGE - From 23 – 27 Nodes
22 – 26 Nodes
5 – 6 NAWF and falling fast
50% have reached cut out 25% just had first Mepiquat and some late crops will finish flowering 10-17 Feb . Will need a warm finish.
IRRIGATION – RAINFALL Isolated storm on 17th Jan 5 -20mm
Rainfall did occur however it was very patchy.
Irrigation cycle 7-8 days where water is available
10 -12 days where it is running short – this has caused some cavitation in some early crops.
Flood irrigation crops on full cycle have used 8-9ML/ha with 3-4 to go! (rain needed)
INSECTS/ DISEASE Very minor Alternaria in 1 field after rain and
cooler weather 17th of Jan which had 90% seedling severity, crop has recovered well – suspect heat sorted it out.
Top five retention is still very good
Beneficials are present in most crops
Retention 90+
First SLW spotted this week
WEEDS - Some Barnyard grass escapes
Most fields have had the 3rd or 4th Glyphosate application
Odd windmill grass and ryegrass flowering
No spray drift evident
Cut back a few hectares due to water use being higher than anticipated
COMMENTS - Boll numbers looking pretty good so far
Crop potential good where irrigation has been maintained.
Most fields have been slow to cut out, particularly where Nitrogen is high
REGION – NARROMINE Fig 3. Day Degrees Season summary: Source
(https://www.csd.net.au/ddc/result)
Fig 4. Day Degrees Season summary: Source
(https://www.csd.net.au/ddc/result)
CROP STAGE - 20 -24 Nodes
24 -26 Nodes & 300 total fruit / m
22 – 24 Nodes
IRRIGATION – RAINFALL Rainfall varies from Nil to 40mm
6th crop irrigation for most, with 2 to 4 irrigations to go
Completed 5th in crop irrigation – 17 ml of rain in total
Pressurised systems have applied between 7.2 – 9 Megs/ha
Starting 6th in-crop irrigation for self mulching soils . Water use has been high and for some crops this will be the last irrigation due to higher than expected water use.
For majority of crops water will be tight at the end so may miss the last irrigation. High hopes on the current weather system to capture extra water.
INSECTS/BENEFICIALS -
Mirid Numbers increased in late Feb Mirid numbers at economic threshold SLW increased at the usual rate SLW numbers very low – monitoring continuing. No Mites, aphids or GVB to speak of SLW present but generally low numbers.
Location Latitude Longitude Date range
NARROMINE AIRPORT -32.2167 148.2333 15 Oct - 20 Jan
2019 2018 2017 10 year mean
Base 12 1338.5 1316 1206.8 1183.7
DD1532 799.2 817.8 733.9 712.5
Cold shock days 15 11 14 16.4
Days above 36°C 36 31 23 22.7
Nights above 25°C 3 7 3 2.5
Days above 40°C 15 15 9 6.6
Average temperature (°C) 25.4 25.3 24.1 23.8
GENERAL COMMENTS - Water usage didn’t increase as expected during
this period.
Most crops now cutout.
Boll shedding significant as expected.
Water supply issues continue.
Hot weather and high retention (76%) has slowed crop growth
Early planted crops (1357DD 5 – 6 NAWF), later planted crops (1289DD) 6-7NAWF
Most crops are cut out or approaching cut out.
Some parrot beaked bolls due to heat.
Overall crops are average to slightly above average yield potential, but will be depended on water at the end.
Rainfall did occur around the 17th of Nov with generally 20ml, however this was not widespread, some got none and some got up to 40mls.
REGION – GEURIE
Fig 4. Day Degrees Season summary: Source (https://www.csd.net.au/ddc/result
Fig 5. Day Degrees Season summary: Source
(https://www.csd.net.au/ddc/results)
CROP STAGE - 25 Nodes, 5 NAWF, cut out applied
INSECTS/BENEFICIALS/DISEASE -
Very quiet and low pressure in most areas Few GVB about Some Alternaria under the pivots GENERAL COMMENTS - Crops have big fruit loads
Watering flat out 8 day cycles in the times of heat I NEED MIRIDS ASAP …… To make sure our insect populations are getting monitored for resistance, I am doing some collections for the researchers this season, as its been quiet I have not been able to do many yet, just a reminder if you see any populations of SLW, Mirids, Mites and Aphids let me know and I will come and grab them and send them off for testing. If anyone has a Lucerne paddock that is harboring a few that would help as well. Just give me a call 0417226411
Fig 6: SLW – What to look for to evaluate parasitized SLW nymphs (Source Jamie Hopkinson Jan 2020)
Thanks to the consultants who get back to me each week, this
information has helped the research community stay across what is
happening in the valleys.
The CottonInfo Crop Check is a summary of cotton crop information
gathered from consultants by each CottonInfo Regional Extension
Officer (REO) for their valley. This information is collected on a regular
basis to share with growers, researchers and other consultants. It
should be noted that the information is just a snap shot in time. It
does not claim to be a thorough report for each valley, just a summary
of comments received. Please call your local REO if you need further
clarification on any information in this report. Please call
0417226411 with any questions you may have pertaining to this
report.
DATE – CROP CHECK 1stst to 18th Feb 2020
Season Summary
Source: bom.gov.au
We have finally had a weather system that has
delivered more than the usual 5mm of dust. The
rain has been patchy and storm activity has
meant that some missed out and some copped 3
months worth of rain in a few hours. In terms of
the Day Degree accumulation for the Upper
Lachlan area it is sitting slightly behind last season
and the nights above 25°C are less than half of
last season. Forbes had its coldest night (12.8
degrees ) and warmest day (44.9 degrees),
February has been the month of extremes.
In Narromine the Base 12 & 1532 are pretty much
on par with than 2017/2018 season, and nights
above 25°C are reduced by 48% compared to last
season. Hot days are significantly higher at Geurie
as are nights above 25°C overall the base 12 is
slightly higher than last season and 1532 is lightly
lower. Everyone is busy checking fallow and
booking in sprays to get ready for winter crops.
Reports of some chemicals being in short supply
are coming through.
REGION – FORBES
Fig 1. Day Degree season summary: Source https://www.csd.net.au/ddc/results
Fig 2. Day Degree comparison using the base 12 and 1532. Source www.csd.net.au/ddc
CROP STAGE - • From 23 – 27 Nodes
• 11/12 Nodes above cracked boll
• Cut out date averaging 17th Feb
• 22 – 25 Nodes
• 4 Nodes above WF
Location Latitude Longitude Date range
FORBES AIRPORT AWS -33.3627 147.9205 15 Oct - 18 Feb
2019 2018 2017 10 year mean
Base 12 1662.4 1699.1 1516 1508.1
DD1532 964 1034.4 884.8 877.8
Cold shock days 29 20 23 27.4
Days above 36°C 40 42 29 28.6
Nights above 25°C 4 10 2 2.3
Days above 40°C 15 16 11 8.3
Average temperature (°C) 24.6 25.1 23.6 23.4
DISEASE
• Alternaria appearing throughout the canopy from rian in recent weeks
• Some open cotton seeing boll rot low in the canopy
IRRIGATION – RAINFALL • Rainfall varied from 60-130ml across the area
• Most crops have 1 – 2 irrigations to go.
INSECTS • Mirids and SLW are present to varying degrees
• Mirid pressure easing – damage evident on young bolls.
WEEDS • Odd grass weed and fleabane present
• Relatively clean fields
COMMENTS - • Boll numbers have been impacted by lack of water
followed by wet cloudy conditions.
• Boll counts averaging 140/m
• Some cavitation has occurred.
• Most fields have been slow to cut out, particularly where Nitrogen is high, pix seems to be affected by the dust in some cases.
REGION – NARROMINE
Fig 3. Day Degrees Season summary: Source
(https://www.csd.net.au/ddc/result)
Fig 4. Day Degrees Season summary: Source
(https://www.csd.net.au/ddc/result)
CROP STAGE - • 23 – 25 Nodes
• 10 - 12 Nodes above cracked boll
• Boll Fill
IRRIGATION – RAINFALL • Rainfall varies from 70 mm to 150mm over last two
weeks
• Water use sits around 8-9ML/ha
• Some will be coming up to last irrigation in early march
• Everyone welcomed the rain over the last two weeks
Location Latitude Longitude Date range
NARROMINE AIRPORT -32.223 148.2292 15 Oct - 18 Feb
2019 2018 2017 10 year mean
Base 12 1793.3 1800 1666.3 1614.5
DD1532 1099.6 1132.6 1024.7 992.7
Cold shock days 15 11 14 16.7
Days above 36°C 46 50 40 34.2
Nights above 25°C 7 13 5 4.4
Days above 40°C 22 19 14 10
Average temperature (°C) 25.9 26.1 25 24.5
DISEASE • Verticillium not as bad as 2 seasons ago however
bit worse than last season
INSECTS/BENEFICIALS -
• SLW are hovering below threshold • Low Mites and SLW numbers • Mirids increased since January • Majority of crops have had 2 sprays • Mirids still building in some later crops • Beneficial numbers solid GENERAL COMMENTS - • In some areas rainfall has saved an irrigation
• Some crops that were 1 water short are now going to get home safe.
• With temperature conditions out of the extreme heat category top bolls are holding and starting to fill
• Some Verticillium is starting to show up in the odd plant
• Both the forbes and Narromine areas have reported that it is taking 2 to 3 passes of pix to properly cut out and plants are not responding to pix as they have in the past.
• Fingers crossed for 3 weeks of 33 degrees to fill the top crop.
I NEED MIRIDS ASAP …… To make sure our insect populations are getting monitored for resistance, I am doing some collections for the researchers this season, as its been quiet I have not been able to do many yet, just a reminder if you see any populations of SLW, Mirids, Mites and Aphids let me know
and I will come and grab them and send them off for testing. If anyone has a Lucerne paddock that is harboring a few that would help as well. Just give me a call 0417226411 Thanks to the consultants who get back to me each week, this
information has helped the research community stay across what is
happening in the valleys.
The CottonInfo Crop Check is a summary of cotton crop information
gathered from consultants by each CottonInfo Regional Extension
Officer (REO) for their valley. This information is collected on a regular
basis to share with growers, researchers and other consultants. It
should be noted that the information is just a snap shot in time. It
does not claim to be a thorough report for each valley, just a summary
of comments received. Please call your local REO if you need further
clarification on any information in this report. Please call
0417226411 with any questions you may have pertaining to this
report.
Date 7th February 2020
Lower Namoi
CROP STAGE
25 nodes
5 – 6 NAWF
Cut out next week
22 FB
Youngest cotton has 14FB
4 – 6 NAWF in older and 6 – 8NAWF in younger cotton
Cut out GR applied to some fields with lower rates applied to younger fields
Water:
Bores have been turned off in some places
Rain helping where it has fallen
0
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25
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29
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02
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06
/02
/20
Wee Waa Day Degrees
Base 12 accumulation DD1532 accumulation
Insect Pests/Beneficial’s:
One mirid spray done
Mirids at threshold in some areas
Mites increasing (will be sprayed with GR)
Whitefly numbers still low considering this point in the season
SLW increasing
Some nymphs are now present
Spraying mites and suppressing whitefly at this stage
Non-Bollgard
Heliothis pressure remains light
No survivors to date
No different to Bollgard fields in regards to other insects
Heliothis pressure has been light but continuous
Larvae getting entrenched in flowers etc
Insecticides performing well
Disease:
No vert noted yet
Only occasional vert affected plants noted
Vert showing up in known high inoculum fields
Comments
Cloud cover will be a concern over this period
Keeping an eye on fields for vert after this cooler and wetter period
Top 5 retentions in most cases high 80’ and 90’s
Top 5 retention taken a bit of a dip around 80’s
Upper Namoi
Crop Stage:
23 – 28 nodes
0 – 8 NAWF
21 – 26 nodes
75% crops cut out this week
Water:
Water budgets hugely variable
Rainfall also variable
Insect Pests/Beneficial’s:
Good beneficial levels
Pest mirris ongoing activity with some area’s worse than others
Mites through most cotton regardless of proximity to corn
Some mites treated, others left to thrips
Levels of Whitefly seem to be holding and decreasing where releases have been done
0200400600800
100012001400160018002000
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14
/01
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19
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24
/01
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29
/01
/20
03
/02
/20
Gunnedah Day Degrees
Base 12 accumulation DD1532 accumulation
Low to moderate SLW nymphs notes (continue to monitor)
All crops have been sprayed with Transform (1-3mirids/m)
SLW building steadily
Admiral spray once this change clears
Some cracked bolls from stress
Disease:
Have seen some sudden wilt in one field
Vert coming into some fields following cooler weather
Low level desiccated leaves
Comments:
Low amounts of bottom fruit in some places (environmental)
Retentions 80 – 95 %
Heavy shed and older cavitation following head and overcast weather
Also some shed cause by extensive mirid stinging and neonate damage to small bolls 3-7days old.
Despite some hard conditions boll size and numbers seem to be holding up
Most crops had cut-out rates of GR
Crops with anything from 1 meg to 4 megs left
Watering average 0.8ML/ha
The CottonInfo Bug Check is a summary of cotton crop information gathered from consultants by each CottonInfo
Regional Extension Officer (REO) for their valley. This information is collected on a regular basis to share with growers,
researchers and other consultants. It should be noted that the information is just a snapshot in time. It does not claim to
be a thorough report for each valley, just a summary of comments received.
DATE – Thursday 6th February 2020
CROP STAGE – 21-26 nodes. Range of NAWF from 4 -7.5. Retention range from 68% to 90 %. Late crops not at
row closure.
INSECTS/BENEFICALS – Good predator numbers. Mirids at threshold have been sprayed. Low mites and SLWF
in some fields. Light helicoverpa pressure. Some fields have had no insecticides.
WEEDS - Late Barnyard grass in some fields. Generally, very clean.
DISEASE/ENVIRONMENTAL – Alternaria present in many fields, worse on repeat ground. Some shedding and
cavitation. Low radiation is a concern next week.
GENERAL COMMENTS – Crops have good fruit load. Bolls filling well in last two weeks. Some growers will be at
least one water short for mid- March irrigation.
0.00
10.00
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40.00
EarlyOct
LateOct
MNov
E Dec L Dec MJan
E Feb L Feb MMar
E Apr L Apr
Solar radiation MJ/m2
Griffith Solar Radiation MJ/m2 Last ten year average
Griffith Solar Radiation MJ/m2 2019-20
0.00
0.50
1.00
1.50
2.00
Earl
y O
ct
Mid
Oct
Late
Oct
E N
ov
M N
ov
L N
ov
E D
ec
M D
ec
L D
ec
E Ja
n
M J
an
L Ja
n
E Fe
b
M F
eb
L Fe
b
E M
ar
M M
ar
L M
ar
Crop Water use ML/ha 2019/20
Ten year ave ML/ha Actual 2019/20 ML/ha
The CottonInfo Bug Check is a summary of cotton crop information gathered from consultants by each CottonInfo Regional
Extension Officer (REO) for their valley. This information is collected on a regular basis to share with growers, researchers and
other consultants. It should be noted that the information is just a snap shot in time. It does not claim to be a thorough report
for each valley, just a summary of comments received