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| Volume
XXVII No. 7 |
May
6, 2002
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GENERAL SITUATION: Weather conditions have not improved since
last week. Field crops still were suffering from the severe lack
of water, heat and very strong and dry winds. Some fields of cotton
in the extreme eastern part of the Valley appeared to be making
some progress, but that will not last much longer without some significant
inputs of water. Most other fields of crops showed continued declines
in potential yields. Irrigated fields were doing ok, but a good
dose of rain water would help to leach out the salts in fields drying
after irrigation.
Cotton
fleahoppers still were found in some fields, but lower in numbers
where insecticide treatments were made last week. Many producers,
particularly in dryland areas, were making decisions to either treat
or not treat economic levels of fleahoppers based on the potential
for rain to keep the crop live. That is still a tough decision to
call. If it does rain in the next two weeks, some fields appeared
to have a chance to produce a reasonable crop. If it does rain and
control of economic levels of fleahoppers are not made, then the
fruit lost to the fleas now will have to be replaced. Not only will
that lose time, but the quality of the fruit lost will not be replaced,
therefore yield quality could be reduced.
If it does
not rain and treatments were made anyway, then that investment is
lost for the year. No guarantee on rain can be made, thus, all we
have to go on to make the decision are the odds of increased rainfall
at this time of the year. While those odds of increased rain in
May are just averages, that is the best weather forecast that is
available. As we said, a tough decision to make.
Aphid infestations
increased in some fields, but were not at high levels in most. The
current weather conditions tend to favor aphids, whiteflies and
spidermites, so all of these pests need to be monitored closely
over the next several weeks.
Beneficial
insects and spiders also were observed to be on a slight increase
along with the aphids. Both convergent and scynmus lady beetle larvae
were reported from numerous fields around the LRGV this week.
Boll weevil
trap counts were again lower this week (See attached trap line graphs)
probably indicating weevil migration to fields rather than traps.
Many fields of cotton were squaring and no doubt the fruiting has
drawn the weevils attention much more than the pheromone traps.
This will be the last week of weevil trapping until later in the
season when weevils again begin to respond to the traps.
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Cotton
Heat Unit Accumulation Table
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Planting
Dates
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Accum.
H.U.
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Planting
Dates
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Accum.
H.U.
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2/15
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1041
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3/15
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884
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3/01
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961
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4/01
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647
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THE INFORMATION
GIVEN HEREIN IS FOR EDUCATIONAL PURPOSES ONLY. REFERENCES TO COMMERCIAL
PRODUCTS OR TRADE NAMES ARE MADE WITH THE UNDERSTANDING THAT NO
DISCRIMINATION IS INTENDED AND NO ENDORSEMENT BY THE COOPERATIVE
EXTENSION SERVICE IS IMPLIED.

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