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Category Archives: Sorghum

22
Aug
2014
Updated Sugarcane Aphid Distribution
Author: Scott Stewart, IPM Extension Specialist No Comments

Below is the updated, known distribution of sugarcane aphids in 2014, including confirmed finds on sorghum in Tennessee. This aphid is certainly present in at least low numbers in other areas. The second map shows the distribution of this invasive pest in 2013, showing the impressive spread Continue reading

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22
Aug
2014
Moth Trapping Report (Corn Earworm are Flying)
Author: Scott Stewart, IPM Extension Specialist No Comments

This will be the last week that moth trapping data will be reported (link here).  Results from last week indicate the the corn earworm (bollworm) flight has finally kicked off, but trap catches last week varied considerably from 2 – 213 moths per trap.  The hot spots appear to be Continue reading

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18
Aug
2014
Grain Sorghum Harvest Aid Options
Author: Angela McClure, Extension Corn and Soybean Specialist No Comments

Desiccant options for grain sorghum are more limited than other crops.  Basically we are limited to glyphosate or sodium chlorate.  Aim herbicide can be included with another material where morningglory vines are dense enough to interfere with the combine.  Gramoxone is not labeled for desiccation of grain sorghum.

Glyphosate products:  apply only after seed have reached 30% moisture content or less and harvest is at least 7 days out.  Rates are from 32 oz to 64 oz/A in 10 to 20 gallons water per acre by ground or 3 to 10 gallons water per acre by air.  Glyphosate is a slow acting material and has not been shown to measurably reduce seed moisture in small plot research.  It should not be used on sorghum grown for seed production.

Sodium chlorate products:  apply 7 to 10 days before harvest at labeled rate.  There are a number of products available that have different rates of active ingredient.  Consider using the higher recommended rate if applying when weather is cloudy and/or damp.

 

 

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18
Aug
2014
Section 18 Granted for Transform in Sorghum
Author: Scott Stewart, IPM Extension Specialist No Comments

I am pleased to announce the fast action of the Tennessee Department of Agriculture and the EPA in approving a specific exemption allowing the use of Transform WG for the control of sugarcane aphids in sorghum.  Some specific label requirements are below. You may view the complete authorization letter here. Continue reading

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14
Aug
2014
Update on White Sugarcane Aphid in Sorghum
Author: Scott Stewart, IPM Extension Specialist 3 Comments

I wrote an article last week about a find of white sugarcane aphids in Madison County. Aphids have now also been found in Shelby and Dyer Counties, so it seems likley they could be found in any sorghum field in west Tennessee. I must emphasis that overall populations are very low and don’t appear to Continue reading

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11
Aug
2014
Post-Harvest Weed Control
Author: Larry Steckel, Extension Weed Specialist 2 Comments

Corn harvest will likely start toward the end of this month. As the corn dries down the next couple weeks expect a new flush of Palmer amaranth. Moreover, with all the rain the first week of August any thin corn stand areas will likely have a new heavy flush of Palmer amaranth.  Though no one wants to spend more money with corn commodity price so low, it will pay off next spring to have less Palmer amaranth to mange in soybean or cotton.  Continue reading

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05
Aug
2014
White Sugarcane Aphids Found in Tennessee Sorghum
Author: Scott Stewart, IPM Extension Specialist Comments Off

The white sugarcane aphid (WSCA) has made it well into Tennessee. On August 5th, I found relatively low populations on heading grain sorghum within the city limits of Jackson. The previous nearest find to Tennessee was in northern Mississippi and across the river from Memphis (Crittenden Co., AR). Thus, it is conceivable this insect could show up in any sorghum field in West Tennessee. It is important that everyone start scouting for this insect and report suspected infestations. Continue reading

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30
Jul
2014
Be on the Lookout in Sorghum
Author: Scott Stewart, IPM Extension Specialist 1 Comment

There are several things to be scouting for in grain sorghum. Below are some suggestions and management considerations. Typically, later maturing fields will be at higher risk to head feeding caterpillars and sorghum midge, so be especially mindful if your fields are just now or not yet heading. Continue reading

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26
Jul
2014
Insecticides – So Many Names!
Author: Scott Stewart, IPM Extension Specialist 1 Comment

By request, I am providing a list of active ingredients and trade names (see below). This does not include all examples. Feel free to make comments about other “generic” trade names you may be using. Please keep in mind that formulations may vary considerably, and thus, rates may need to be adjusted accordingly. Also, not all products be labeled for the same crops. It is your responsibility to follow instructions on the insecticide label. The information below is also available in UT’s insect control recommendations for field crops. Continue reading

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19
Jul
2014
Proper Nozzle Selection for Pesticide Applications
Author: Shawn Butler, Graduate Research Assistant Comments Off

As we get further into the year, bugs begin to enter our fields, disease onset starts to occur, and weeds continue to flourish, our chances of making tank-mixed applications increase. This ultimately makes spray nozzle selection more challenging as most products require different droplet sizes.  Continue reading

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16
Jul
2014
Good News (Kudzu Bug), Bad News (White Sugarcane Aphid)
Author: Scott Stewart, IPM Extension Specialist Comments Off

These are a couple of new pests we need to be on the lookout for. Let’s start with the good news. Continue reading

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14
Jul
2014
Reminder: Milan No-till Field Day This Thursday
Author: Scott Stewart, IPM Extension Specialist Comments Off

Without a doubt, the Milan No-Till Crop Production Field Day is one of the most far-ranging agricultural field days in the nation. The event is a junction for producers with varied farming interests. Tours will cover topics as diverse as row crop sustainability, beef cattle production, natural resource management, unmanned aerial systems and even the compatibility of honeybees and agriculture. Registration is free and begins at 6 a.m. CDT, with the first tours leaving at 7 a.m. A total of 16 tours are on the agenda. Continue reading

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