Events Calendar

September  2014
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When to Terminate Bollworm Sprays in Late Season Bt Cotton

We have had numerous calls over the last couple weeks about small, 2-5 day old larvae, under bloom tags in Bt cotton that is near, at, or beyond cutout. All of the research done to this point suggests that cotton is safe from bollworm damage when it reaches node above white flower 5 plus 300 heat units. . . . → Read More: When to Terminate Bollworm Sprays in Late Season Bt Cotton

Cotton Irrigation Termination

As we approach the end of August, terminating cotton irrigation is on the mind of many folks.  In cotton, we recommend terminating furrow irrigation at first cracked boll.  If you anticipate bolls opening in the immediate future and have been dry for some time, a final irrigation event may be in order.  However, once bolls begin . . . → Read More: Cotton Irrigation Termination

Bollworms in Dual Gene Bt Cotton: Control and Expectations

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Over the last 7 days we have had numerous reports of high bollworm numbers in some BollGard II, TwinLink, and WideStrike fields in the Mississippi Delta. We have seen fields in the past that reach treatable levels but some reports are much higher than we have seen in recent years. At this time there does not appear to be any specific varieties that are adversely affected more than others. It appears to be a function of high pressure in isolated areas at this time. . . . → Read More: Bollworms in Dual Gene Bt Cotton: Control and Expectations

Last Effective Bloom Date in Cotton

The last effective bloom date is the last date that a white flower will accumulate enough heat units to mature into a harvestable boll.  Generally speaking it takes 850 heat units for a white flower to mature into a harvestable boll.  Using 30-year historical weather data from the National Climatic Data Center, the last effective bloom . . . → Read More: Last Effective Bloom Date in Cotton

Another Surge Valve Experience!

This week we encountered another issue with a surge valve. After irrigating with a surge valve the producer noted that neither the 6” nor 12” sensors responded to the irrigation. When investigating the problem it appeared that the grower had done as instructed, making the proper adjustments to the advance cycle. What’s going on? Further investigation . . . → Read More: Another Surge Valve Experience!

Late Season Potash Deficiency in Cotton

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The evolution of cotton cultivars has led to higher yield potentials and shorter growing seasons compared to the historical full season cultivars favored in the Mid-South.  These newer, faster fruiting cultivars may require more nutrients than older outdated cultivars.  Recently, across the Mid-South, many consultants, state extension and research specialists have observed numerous cases of potash . . . → Read More: Late Season Potash Deficiency in Cotton

Managing Cotton Aphids in 2014

We had a few calls over the last week about poor control of cotton aphid with Transform. In all of those cases, the field was actually sprayed for plant bugs with a 1.5 oz rate of Transform. That rate should be very effective on cotton aphid based on previous experience. As a result, we collected aphids from three different fields this week to test their susceptibility to Transform. . . . → Read More: Managing Cotton Aphids in 2014

North Mississippi Research and Extension Center’s Agronomic Row Crops Field Day on Thursday, August 7

The North Mississippi Research and Extension Center’s Agronomic Row Crops Field Day on Thursday, August 7 will present the latest research to the area’s row-crop farmers and consultants. The field day will be from 8 a.m. to 1:30 p.m. at the Lee County Agri-Center Magnolia Conference Center on Highway 145 South in Verona.
. . . → Read More: North Mississippi Research and Extension Center’s Agronomic Row Crops Field Day on Thursday, August 7

Cotton Bacterial Blight Update: July 18, 2014 (UPDATED 7/28/2014)

Additional bacterial blight has been observed in the MS cotton production system. At present, 12 counties have been reported to contain infected cotton. . . . → Read More: Cotton Bacterial Blight Update: July 18, 2014 (UPDATED 7/28/2014)

Random Yellow Spots in Cotton Fields

Several calls have come in this week regarding random yellow spots in cotton fields.  While there are a multitude of things that may cause this, there seems to be an underlying theme in many cases.  Everyone is aware of the rainfall we have received this year.  As a result of season long moisture levels, oxygen supply . . . → Read More: Random Yellow Spots in Cotton Fields