Seminole Crop E News

Agricultural News for Farmers and Agribusiness in SW Georgia

Archive for the ‘Weeds’ Category

Wheat Weed Control UGA 2015

Posted by romeethredge on December 11, 2015

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Posted in Weeds, Wheat | Leave a Comment »

Morningloy control in Peanut

Posted by romeethredge on August 28, 2015

We’ve been getting many questions lately about late-season morningglory control in peanut.  In most cases, it is too late in the year to apply herbicides.  Pre-harvest intervals (PHI) of peanut herbicides with POST activity on annual morningglory are as follows: Cadre = 90 days; Cobra = 45 days; Ultra Blazer = 75 days; 2,4-DB = 30-45 days.

 In Dr. Eric Prostko’s, UGA Weed Scientist, opinion, the best thing a grower can do for annual morningglory this late in the season is to apply a pre-harvest application of either Aim or ET (i.e. 7 days before digging).  Both herbicides will provide sufficient dessication of annual morningglory plants (except smallflower) to improve peanut vine flow through a digger with minimal effect on the peanuts . It is very important that the peanuts be dug in 7 days after treatment (or as soon as possible after that time).  If digging is delayed, the morningglory vines could start to recover/regrow especially after a rainfall event.  Specific recommendations for these herbicides can be found on page 502 of the 2015 UGA Pest Control Handbook.

Figure 1.  Annual morningglory response to Aim (5 DAT).

Posted in Peanuts, Weeds | Tagged: , | Leave a Comment »

Question of the Week – Pokeweed

Posted by romeethredge on August 28, 2015

Last week I had a photo of Pokeweed aka pokeberry, poke salad. It has some poisonous properties , oxalic acid and phytolaccotoxin , the root being the most toxic. It can cause gastro problems in cattle.Fullscreen capture 8282015 72836 AM

The song is Poke Salad Annie, sung by Tony Joe White,”Poke salad Annie, Gator got your Grannie…. ” Apparently Annie had to eat a lot of Poke salad she was so poor.

If cooked it’s important to pour off the water the leaves are cooked in. I talked to a farmer who had eaten some and he said you must eat only the very young leaves or it will be very bitter and contain poisonous properties.

 

Here’s a video by UGA Scientist Dennis Hancock, concerning thias and other plants poisonous to livestock.

The fruit is actually an important wildlife food., consumed by many birds, deer, foxes. Doves like the seeds in winter.

This week’s question is about this pond weed that I was recently asked about, and I took this photo at the pond. What is it?IMG_8184

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Question of the Week – Macrophoma Rot

Posted by romeethredge on August 19, 2015

Last week I had a photo of a muscadine with a spot on it. We get several disease caused spots on muscadines and some caused by insects. This one is Macrophoma rot and it can occur worse during rainy times and seems to be worse on certain varieties.  Fungicide sprays early in the season go a long way towards helping have a good muscadine harvest. Agent Mark Crosby wrote a good article about this you can link to here.

Macrophoma rot (Botryosphaeria dothidea) causes small, sunken, black fruit spots that are round with distinct edges in the early part of the season. As harvest approaches, these spots may develop a greasy-looking soft rot around the initial lesion. A halo develops around the black spot and the entire fruit may rot just before harvest. Infections are sometimes not visible until the soft rot stage occurs.

This week I was asked to identify weeds for folks and I got one weed twice in the same week. So I’ll make it the question of the week. What is this plant?

And the Bonus question: What is the song about it, or at least it’s mentioned in the song?IMG_0552

Posted in Agriculture, Horticulture, Weeds | Tagged: | 2 Comments »

Hydrilla Town Hall Meeting – Tuesday

Posted by romeethredge on August 13, 2015

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Here are some hydrilla recommendations for lakes from UGA Extension’s Gary Burtle.

“Granular formulations would work.

Granular Hydrothol would burn it back but have no lasting control.  Use this or diquat in association with grass carp stocking in small ponds.

Granular Sonar may provide longer term control because of slow release of fluridone.

 

Another burn back treatment is to apply a ratio of 2 gallons of Diquat and 2 to 3.3 gallons of Cutrine plus on a per surface-acre basis, so ¼ acre around a dock would take about ½ gallon of Diquat and ½ to ¾ gallon Cutrine plus.  Again, this treatment is more effective than Diquat by itself.

 

Granular Clearcast 2.7 G is effective at 80 pounds per surface acre in water that averages 4 ft deep.  So around a dock I would use 20 pounds in about ¼ acre area.

Clearcast 2.7G is quickly absorbed by foliage and/or plant roots and rapidly translocated to the growing points stopping growth. Susceptible plants may develop a yellow appearance or general discoloration and will eventually die or be severely growth inhibited.

Clearcast 2.7G is herbicidally active on many submerged, emergent and floating broadleaf and monocot aquatic plants. (BUT MAY TAKE SEVERAL WEEKS TO SEE THE EFFECTS)”

 

Remember to follow  regulations for your water body and all label requirements.

Posted in Water, Weeds | Tagged: , | Leave a Comment »

Peanut Weeds

Posted by romeethredge on July 1, 2015

Dr. Eric Prostko, UGA extension weed scientist, gives a good Peanut weed control update, below.

1) Cobra or Ultra Blazer applications should be avoided if possible when the peanut plants are in the R5 (beginning seed) to R6 (full seed) stage of growth (Figure 1).   Results from a 9 location study conducted in 2005-2006 indicated that Cobra applied at this time could cause a significant peanut yield loss (~5%).

Figure 1. Peanut Stages of Growth.

2) Nearly all 2,4-DB labels limit the official number of applications that can be made in peanut to 2.  Results from trials conducted in 1997 indicated that peanut plants (Florunner and GK-7) were tolerant of multiple applications (1, 2, or 3) of 2,4-DB.  Research is currently underway in 2015 to confirm these older results using GA-06G.  Check out Figure 2 for a list of how much and when 2,4-DB can be applied according to current labels.

Figure 2.  Summary of 2,4-DB labels for use in peanuts.

3) On more than 1 occasion this year, growers have accidently applied 2,4-D amine rather than 2,4-DB to peanut plants.  Fortunately, we have a good idea what could happen to peanut yields when this occurs (not that bad depending upon rate and peanut stage of growth).  Check out the following UGA Extension publication:

http://extension.uga.edu/publications/files/pdf/C%201036_1.PDF

“Not a rocket scientist for sure but I am thinking that is a great idea to read and check the label (or at least look at it) of any pesticide jug before dumping it into a spray tank.  As my father once told me, fast and ready sets the pace but slow and steady wins the race!”

Posted in Peanuts, Weeds | Tagged: , | Leave a Comment »

Morninglory ID

Posted by romeethredge on June 30, 2015

Morninglories can be hard to control and hard to identify. Identification is important so that you can use the right chemical to control them.  Probably the most important thing is to be able to tell Smallflower morninglory from the other types.

Dr. Eric Prostko, UGA Extension Scientist, recently provided some insight into morninglories.

Here is an old chart that can be useful in identifying morninglories.

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Figure 1.  Identifying Morningglory Species.  Source: Dr. Dick Oliver, University of Arkansas,  Weeds Today

  Some very good close-up pictures of seedling morningglory plants.  Pictures are from LSU and Virgina Tech.

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Why is this important?  Not all morningglories are controlled equally by certain herbicides. Here are a few examples:

a) Gramoxone (paraquat) is generally good on most morningglory species but not smallflower.

b) Basagran (bentazon) is generally not effective on most morningglory species but will control smallflower.

c) Staple (pyrithiobac) is generally considered to be an excellent morningglory herbicide but not on tall. d) 2,4-DB is less effective on pitted morninglory than other species.

e) Aim (carfentrazone) is considered a good morningglory herbicide but not on smallflower.

Also, in cotton, Envoke is good on most morninglories but not Smallflower.

Posted in Weeds | 1 Comment »

Pigweed now a Nursery?

Posted by romeethredge on June 19, 2015

No extra charge for this blog post concerning racoons in a pigweed plant.

I guess pigweed is good for something, a racoon nursery. Farmer Micheal Thompson was out pulling pigweed in peanuts and come upon this sight, two baby racoons hanging on.

If we could just train them to pull up pigweed……

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Question of the Week – Goatspur

Posted by romeethredge on June 19, 2015

Last week I had a photo of weed seed. It was from Goatspur or Bristly Starbur among other names, Goathead, etc. It is not as serious a weed problem as it once was but is still a concern in rowcrops.

 

 

This week’s question is about a fish. Can you identify this fish I caught in Spring Creek this morning? Is it good to eat?

It was hot that I swam with the fishes a good bit.

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Posted in Weeds, Wildlife | Tagged: , | 2 Comments »

Question of the Week – Turtle Tracks

Posted by romeethredge on June 9, 2015

Last week’s photo was of turtle tracks through a field. It looks like she was dragging her belly pretty good. She was likely looking for a place to lay her eggs, according to Bobby Bass of the Jones Center. Someone else said maybe looking for water or a pond. There is a small 1/4 acre pond near there that a lady called me to look at one time and I remember there was a 4 foot long grass carp in there that looked kind of  like the Loch Ness monster .

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This week’s question is about plant identification. What is this the seed of?

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Posted in Weeds, Wildlife | Tagged: , | 2 Comments »

 
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