Archive for the ‘Soybeans’ Category
Posted by romeethredge on November 1, 2013
Posted by romeethredge on October 25, 2013
Hey, if the cows are going to soon be hungry, you can get a jumpstart on fall grazing by flying on a small grain while the summer crop is in the field, Jack.
It’s hard to get a stand as good as you would get by waiting and drilling or disking in the seed, but every situation is different. Here are some photos of where we did this in soybeans, The grower waited until most of the leaves were off the soybeans so the airplane could get good coverage of the area and so there wouldn’t be so many leaves covering the seedlings. This grower used 2 bushels of wheat per acre. They were flown on by an aerial applicator and the grower started up the irrigation and very lightly watered the field and did it again in three days. It looks like we have good germination, and after the soybeans are harvested he should be able to put his cattle in to graze in a short period of time. It won’t be perfect but they will have some grazing earlier than they would have and the cow won’t jump over the moon but the airplane came close.
Posted by romeethredge on October 25, 2013
Soybeans are dropping their leaves and harvest time is approaching for the full season crop. Grower sprayed them twice with fungicide and once for caterpillars and once for stinkbugs and kudzubugs, so they have been cared for and I believe they will yield well.
Preharvest soybean losses can be minimized by planting shatter-resistant varieties and early harvest.
Soybeans should be harvested shortly after their moisture content first reaches 14-16 percent if possible or the buyer may require them to be 13% if you aren’t going to dry them.
The cylinder and fan speed must be adjusted to fit threshing conditions. When the moisture
content of the soybeans is above 13 percent, they are usually tough; so the cylinder speed may
have to be increased to 600 rpm. As soybeans dry, lower the cylinder speed to reduce breakage;
450 to 550 rpm should be high enough for soybeans that are below 13 percent in moisture
Posted by romeethredge on October 4, 2013
I was looking at some Ultra-Late soybeans today that are looking good overall. They have a few loopers but I’m concerned about the level of whiteflies that are present. You can tell you have whiteflies by the way they will fly up when you disturb the plants. I didn’t see much sticky honeydew or sooty mold or I would be more concerned. Dr. Phillip Roberts, UGA Entomologist, said we should watch them and if they are serious and we need a stinkbug or kudzubug spray anyway, then there are some chemistries that will suppress them. Call or email me for more information on that. firstname.lastname@example.org He says to keep the beans from any stress, especially moisture stress and only treat other pests when thresholds are exceeded so as to preserve beneficial insects. Their development should slow down as we have cooler fall temperatures. The white insects are the adults and the yellow lemon shapes are the immatures.
Posted by romeethredge on August 30, 2013
Loopers and other foliage feeders have been a pest in some fields. Also, kudzu bugs have been a problem and some older fields may have to have a second spray for them.
What bothers me is the increase in stinkbugs in some fields. This field I was in this week had some stink bug egg masses. The dark ones are about to hatch and the creamy ones need a few more days. The grower will have to watch this field closely next week to determine if a stink bug spray is needed.
Posted by romeethredge on August 16, 2013
We have a few full season soybeans that are setting a good crop. Most have been sprayed for kudzu bugs and loopers and diseases.
Ultra late soybeans planted after corn harvest look ok. They are later than usual but we still hope for a good harvest if we have a warm fall. Some foliage feeding caterpillars have been seen on them.
Posted by romeethredge on July 19, 2013
Soybean pests are getting our attention on some of our beans that are blooming now and otherwise looking real good. Soybean looper numbers are increasing a bit and we are seeing 15% foliage damage(action level) in some fields.
Kudzu bugs are a very interesting new pest. Two weeks ago the adults were abundant in fields but we have waited to see the next generation before spraying as recommended. And sure enough we are beginning to see a good many juveniles in some fields. It’s not good that we are having to treat them this early according to Dr. Phillip Roberts, UGA Extension Entomologist, but we need to protect the crop and in some cases we can let the plane fly once to get 2 pests.
Here below see the adult on the leaf and a juvenile on my finger. Here is an adult and an egg mass, below.
Posted by romeethredge on June 12, 2013
Many soybean growers are in the process of applying their 1st postemergence (POST) herbicide. Dr. Eric Prostko, UGA Extension Scientist, reminds us about possible burn. One of the most popular POST soybean herbicide used in Georgia is Reflex (fomesafen). Reflex can be mixed with glyphosate (avoid K+ salt formulations of glyphosate though) and will provide both POST and residual control of Palmer amaranth. Growers who have not used Reflex in the past need to be aware of the fact that this herbicide will cause temporary crop injury (Figure 1). Since Reflex is a contact herbicide, the injury will only be observed on the leaves that were present at application and yield should not be affected.
Any new soybean growth should not exhibit Reflex injury symptoms. Other PPO-inhibitor herbicides, including Cobra (lactofen) and Ultra Blazer (acifluorfen), will cause similar soybean injury symptoms.
Posted by romeethredge on April 27, 2013
UGA Extension Plant Pathologist, Bob Kemerait, gives us the following plant disease update.
Fungicides and Corn:
My graduate student Suzette Arcibal has spent much of last season assessing the impact southern corn rust, northern corn leaf blight and southern corn leaf blight. Her graduate studies have been sponsored by BASF and I am grateful for their support. Based upon her findings, here are my comments for use of fungicides on corn:
1. For management of foliar diseases on corn planted in March and April:
a. Watch sentinel plot reports for detection of southern corn rust.
b. Control of southern corn rust: In most situations I believe that a fungicide application made at first tassel (VT) will be sufficient to lay a good foundation to rust control and may be all that is needed for the season; however depending on the pressure, growers may be advised to make a second application within 3 weeks of the first.
i. Triazole and strobiluirn fungicides are effective against rust; the combination of both will have a longer protective window and broader activity against other pathogens.
c. Control of northern corn leaf blight (NCLB): Unlike southern corn rust which must be reintroduced into Georgia in 2013, the northern corn rust pathogen is already here surviving in last year’s crop debris.
i. Northern corn leaf blight will not be a problem in every field, but in fields where it is a problem, timely use of fungicide program can protect yield.
ii. From Suzette’s data, northern corn leaf blight is most effectively managed by a combination of an early application (for example the 5th true leaf stage) and a follow-up application at late tassel-early silking stage.
iii. The spores of the NCLB fungal pathogen can be spread between fields; however the earliest infections will likely occur as rain and irrigation splash the spores from the crop debris and soil to the lower leaves of the corn plants.
iv. I recommend that as the corn crop approaches the 5th-true-leaf stage, growers should scout to determine if northern corn leaf blight is developing. Again, not all corn fields need to be treated with a fungicide for management of northern corn leaf blight; however it is important note if the disease is likely to be severe.
v. I believe that northern corn leaf blight is more difficult to control than is southern rust (assuming you are on time with applications) and that a combination of strobilurin and triazole fungicides is an important consideration.
2. For management of foliar diseases on corn planted after April:
a. The threat from southern rust becomes more severe.
b. The threat from southern corn leaf blight increases.
c. The threat from northern corn leaf blight remains important.
d. The potential benefit to beginning a fungicide program
e. The potential yield benefits from use of a fungicide becomes even greater as a percentage of potential yield for late-planted corn.
f. The benefit of planting a rust-resistant hybrid becomes more important with late-planted corn.
Two web sites to note:
www.sbrusa.net (National site to follow the progress of Asian soybean rust) We have not found any soybean rust on NEW GROWTH kudzu but did find some on OLD GROWTH kudzu in Miller County. Those old leaves have been destroyed. Soybean rust is present in northern Florida, Alabama, and Louisiana.
scr.ipmpipe.org Sentinel plot site for southern corn rust. Southern corn rust has not been found in Georgia yet in 2013.
Posted by romeethredge on April 16, 2013