Northwest
Plains
Pest Management News
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| Volume 1 Issue 12 |
Bailey
and Parmer Counties
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August
30, 2002
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Northwest
Plains
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Current Crop Conditions More scattered rain across the area continues to bring much needed moisture to the area. Accumulated rainfall at the Farwell weather station from April first to August eighteenth totaled 2.69 inches. Rainfall in the last ten days has totaled 5.24 inches. Cooler temperatures have moved the projected day to reach 450 heat units past cutout to September fourth. That is for cotton that reached five nodes above white flower on August seventh. Cotton that has accumulated 450 heat units since cutout is relatively safe from small worms. Once cotton has reached 850 heat units since cutout, harvest aid applications should be considered. Corn silage
harvest is progressing very well, preliminary yields have been in the
27 to 30 tons per acre range. Corn grain harvest has started in Lamb and
eastern Bailey and Parmer Daily Water Requirements
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Bollworms/Headworms/Podworms Egg lay continues at 15,000 to 30,000 eggs per acre in most areas. More and more of the eggs laid are not viable. The more immature crops are most attractive at this time.
Late grain sorghum, black-eyed peas, and beans are hosts of choice for "bollworms" now. Beet Armyworms
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Aphids Aphids
have started building back up. A few fields have been treated, but most
remain well below threshold. Beneficials Early Season Wheat
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Monti Vandiver |
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| Educational programs
conducted by Texas Cooperative Extension serve people of all ages regardless
of socioeconomic level, race, color, sex, religion, handicap or national
origin. The information given herein is for educational purposes only.
References to commercial products or trade names is made with the understanding
that no discrimination is intended and no endorsement by Texas Cooperative
Extension is implied.
The Texas A&M University System, U.S. Department of Agriculture,
and the Commissioners Courts of Texas Cooperating
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As
cotton matures the threshold for bollworms can be extended. Counts of
20,000 one fourth inch or smaller worms or 12,000 three eighths to one
half inch worms per acre on this more mature cotton can be used as threshold.
Beet
armyworms are scattered around the area. Most fields only have scattered
hits. Under the lighter pressure the beneficials are keeping the BAW under
control.
continue
to work on the aphid population. Preservation of these beneficials need
to be considered if a treatment has to be made. A half pint of furadan
will clean the field of everything but the beet armyworms, which could
blow up in the absence of the beneficials. Insecticidal control of
cotton aphids should be delayed until infestations exceed 50 aphids
per leaf. Producers in the Lubbock area have been using Intruder
at 0.6 ounces per acre with excellent results. The 0.6 ounce rate of
this product is comparable in price to Furadan.
Army
cutworms have started to emerge. These cutworms are the immature stage
of what most people call a miller bug. Fall armyworms and beet armyworms
are also present in other crops but will be looking for more tender
vegetation as their current hosts mature. Wheat will then become their
primary host. The name armyworm indicates the worms feeding pattern.
They may attack wheat fields in large numbers devouring all plant material
in their path.
