Monthly Archives: July 2014

Pesticide Formulations

If you have a private pesticide license (category 10) or commercial license (category 21) and need an hour of credit, I am holding a course at the Thomas County Extension office where you can earn one hour credit in either category.

PesticideCredit

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Peanut Water Requirements

Peanuts-Rain 002

The high amount of rainfall during our peanut planting window caused growers not to get their peanuts planted until mid-to-late May. We now face a higher water use period falling in time with less rain period. We have be getting scattered showers in the afternoons, but not enough to provide the water we need. To make sure the crop has enough water UGA Extension Scientist, Dr. Gary Hawkins, has the chart below representing water use throughout the growing season.  This indicates what peanuts need at different maturities and can also be used as a guide to how much water is needed.

We need to also be aware that soil type has an impact on the amount of water available to the crop.  For sandy soils, a high intensity rain will likely infiltrate and may provide needed water, however, in heavier soil, the same intensity rainfall will potentially have high losses due to runoff because it will not be able to absorb the water as well as the sandy soil. On the other hand the heavier soils have a higher water holding capacity and will retain moisture for longer than sandy soils.

PeanutWaterUse-Dr.Hawkins

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Filed under Irrigation, Peanuts

Kudzu Bug Thresholds

Soybeans 002

Soybeans are in the county are flowering now moving into the reproductive (R6) growth stage. I got reports last week of kudzu bugs and found some Monday. According to UGA Extension Entomologist, Dr. Phillip Roberts, kudzu bugs populations have been lower in the state overall this year.

Adult Kudzu Bug

Adult Kudzu Bug

We still want to watch for nymphs but try not to spray tooearly. At least two generations occur each year; it takes 6 – 8 weeks for a kudzu bug to complete its lifecycle. Because of this, spray timing should interrupt the development of lifecycle by targeting immatures. The threshold is one nymph per sweep or many nymphs present visually.

KudzuBugThreshold

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Sweet Corn Production Workshop

Mr. Calvin Perry at Stripling Irrigation Research Park in Camilla is holding a Sweet Corn Production Workshop  on Tuesday, July 22.

Here’s the tentative schedule for the Workshop:

9am – Welcome (Calvin Perry)

9:10am – Fertility and Varieties (Dr. Tim Coolong)

9:30am – Insect Management (Dr. Stormy Sparks)

9:50am – Weed Management (Andy Shirley)

10:10am – Weather Station Network (Dr. Ian Flitcroft)

10:30am – Break

10:45am – Irrigation Management including Drip (Dr. Gary Hawkins)

11:05am – Previous Irrigation Management Projects, Soil Moisture Sensors (Rad Yager)

11:25am – Precision Ag, Soil Mapping, Etc. (Dr. Wes Porter)

11:45am – Food Safety, Sanitation Management (Dr. Bill Hurst)

12:05pm – Lunch

**For lunch arrangements, we will need to get a head count by Thursday, July 17. Please RSVP by that date.

Note – we are in the process of requesting CCA ceu credits.

If you have any questions, contact SIRP at:

Phone 229-522-3623

Email: perrycd@uga.edu

Web: www.striplingpark.org

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TPTH Resistance Concerns

Pecans-Nutsizing

I was out looking at an orchard yesterday which just received some needed rains. With the dry weather, aphid populations were rising and were sprayed. Mites were also present and now increased after aphid spray. The rain also helped to wash off sooty mold growing on leaves from honeydew of aphids. We observed some Desirables showing a much lighter crop than we were hoping – especially for the lower pressure from scab at this time. Pollination of this year’s crop has been negatively  impacted with cooler nights and cloudy, rainy days this Spring. The crop is behind, and we’re still in mid nut sizing period.

Pecans (2)UGA Pathologist, Dr. Katherine Stevenson, has been testing many leaflet samples for insensitivity of our fungicides. There has been concern over resistance found in tin (TPTH), leading some to believe we cannot use it anymore. This is not the case. Below is a summary from Dr. Stevenson:

“We are seeing some unusually high levels of insensitivity to TPTH this year in some of the sampling locations – higher than we have seen in the past.  However, we have seen a gradual increase in insensitivity to TPTH over the past 20 years, which is not unexpected based on the heavy use of this product.  The unusually high levels we are seeing this year may be because insensitivity has increased over the past 5 years, but it may also be due to the fact that we are sampling more locations this year than we ever have in the past, which provides the opportunity to see the full range of sensitivity values that may not be readily observed when sampling from a small number of locations.

Unlike Benlate, resistance to TPTH is quantitative and as far as we know, is not conferred by a single mutation, but more likely, the accumulation of many small mutations or other mechanisms.  It is not an ‘all or nothing’ type of resistance, like resistance to Benlate.  This means that even if some insensitivity to TPTH is detected in a population, it generally happens very gradually, and the fungicide may continue to be effective, especially when applied at a higher rate.”

UGA Extension Pecan Specialist, Dr. Lenny Wells says the best thing growers can do is learn where you stand with regard to this issue and how best to manage scab in an orchard and to have scab surveyed. In the meantime, avoid using the same fungicides over and over and rotate chemistries as suggested.

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Fall Armyworms – Browntop Millet

BrowntTopMillet-FallArmyworms 016

I was out with Mr. Tommy Duran yesterday morning where we looked at fall armyworms in browntop millet. These caterpillars were sprayed the day before and are dying and looking sick. Colquitt County Ag Agent, Jeremy Kichler, has reported seeing armyworms the last few weeks. In general, millet is tolerant of whorl stage defoliation, according to UGA Extension Entomologist, Dr. David Buntin. However, we still want to treat when 50% of the whorls are infested. There was no question here with the amount of caterpillars and droppings seen down in the whorls.

Fall Armyworms 018

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Filed under Entomology, Grain

2014 Row Crop Planted Acres

UGA Economist, Dr. Nathan Smith, has information on our reported acreage at Georgia’s Crop Acreage Shifts Back to Rotation.

Corn and grain sorghum acreage is down with the acres shifting to more cotton, peanuts and soybeans.

Peanut acreage for Georgia is reported at 590,000 acres. This is up 37% from 430,000 in 2013. Cotton is shown as rising to 1.45 million acres with an increase of 6%. Soybean acreage is pegged at 280,000 up 50,000 over 2013 for a 22% increase. Sorghum acreage is down 10,000 acres to 45,000 in 2014.

Looking at the five major spring planted crops in terms of acres, corn, cotton, peanuts, sorghum and soybeans, there are 150,000 more acres planted to these crops than in 2013. That suggests acres shifted out of somewhere else into these crops or there will be adjustments later in the year.

This table shows 2013 and 2014 as well as 10 year crop averages:

2014 Crop Acreage

 

 

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Filed under Corn, Cotton, Economics, Forages, Grain, Peanuts