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Posts From Trent Irby, Extension Soybean Specialist

Considering the R3/R4 Automatic Application in Soybean: Time to Apply Two Modes of Action Instead of One

Considering the R3/R4 Automatic Application in Soybean: Time to Apply Two Modes of Action Instead of One Updated

🕔11:15, 3.Jun 2017

Over the past week calls have started to be received regarding the automatic fungicide application in soybean. On-farm, large plot trials were conducted during 2015 and 2016 to assess the benefit of several different fungicide products and to reevaluate the automatic application timing. At present, we believe that a mixed mode of action fungicide, or one that provides more than one mode of action would be more beneficial than the stand-alone strobilurin (QoI) fungicide application that has become popular over the past decade.

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Managing Target Spot of Soybean: 2016 Fungicide Trial Efficacy Results

Managing Target Spot of Soybean: 2016 Fungicide Trial Efficacy Results Updated

🕔09:29, 1.Apr 2017

Target spot management in soybean production systems remains a hot topic going into the 2017 season. The environment that occurred during late July and early August 2016 made us respect a disease that is often “out of sight and out of mind”. Fungicide data from two efficacy trials conducted during 2016 are included in this blog post.

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Soybean Planting Dates and Maturity Groups for Mississippi

Soybean Planting Dates and Maturity Groups for Mississippi Updated

🕔13:47, 29.Mar 2017

It is nearly April and many producers are itching to start planting soybeans in Mississippi.  Given that, I figured now would be a good time to re-post some information from a large multi-state study that looked at the interaction of

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You don’t need to push soybean seeding rates

You don’t need to push soybean seeding rates Updated

🕔12:16, 28.Mar 2017

  Last spring I was driving around with a farmer who told me that he was going to plant his soybeans at 180,000 seeds/acre.  When I asked him why, he said “More mommies and daddies make more babies.”  That statement

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Online Auxin Herbicide Training Starts February 13

Online Auxin Herbicide Training Starts February 13 Updated

🕔10:17, 3.Feb 2017

Mississippi producers interested in purchasing auxin-containing herbicides intended for in-crop use on 2,4-D- or dicamba-tolerant crops must first complete mandatory online training.

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Soybean Variety Suggestions for 2017 Updated

🕔15:34, 7.Dec 2016

Variety selection is likely the most critical management decision associated with soybean production. Factors such as soil type, planting date, irrigation capabilities, row spacing, harvest capacity, among others, may influence the decision of selecting an appropriate variety for profitable soybean

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2016 Soybean Variety Demonstration Program Summary

2016 Soybean Variety Demonstration Program Summary Updated

🕔17:50, 4.Nov 2016

The On-Farm Soybean Variety Demonstration Program is conducted using a set of varieties with proven performance.  These varieties are grown in a production setting on various soil types and management systems around the state. Demonstration sets for both maturity group

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Soybean Disease Update: September 7, 2016

Soybean Disease Update: September 7, 2016 Updated

🕔21:03, 10.Sep 2016

Foliar diseases continue to be observed throughout the MS soybean production system. Cercospora blight, frogeye leaf spot and target spot have been commonly observed. Soybean rust continues to be observed at low levels in areas where the disease has occurred following the rainfall received over the last month.

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Identifying Late Season Soybean Growth Stages

Identifying Late Season Soybean Growth Stages Updated

🕔22:19, 19.Aug 2016

As we approach soybean physiological maturity, determining the specific soybean growth stage can aid in several important management decisions. Distinct differences exist between the R6 and R6.5 growth stage.

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Soybean Harvest Aids

Soybean Harvest Aids Updated

🕔22:04, 19.Aug 2016

Over the past week, following the excessive rainfall received through most of the soybean production area, several calls have been received regarding soybean seed sprouting in the pods.

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Stink Bugs and Redbanded Stink Bugs in Soybeans- What to do?

Stink Bugs and Redbanded Stink Bugs in Soybeans- What to do? Updated

🕔09:13, 12.Aug 2016

Over the last few weeks we have been getting more and more calls about redbanded stink bug in soybeans. Redbanded stink bugs (RBSB) are voracious seed feeders, infest fields later, and are more difficult to control than greens, southern greens,

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Foliar Soybean Disease Update: July 30, 2016

Foliar Soybean Disease Update: July 30, 2016 Updated

🕔07:04, 30.Jul 2016

Foliar diseases continue to be observed throughout the Mississippi soybean production system. Low levels of frogeye leaf spot, Septoria brown spot and target spot have been frequently observed following the rainfall of the past two weeks. The first soybean rust on soybean was observed on Friday in Rankin County, MS on a single leaf in a field of R4/R5 soybeans.

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UPDATED First Soybean Rust of 2016 Detected in Four Southwest MS Counties

UPDATED First Soybean Rust of 2016 Detected in Four Southwest MS Counties Updated

🕔13:23, 25.May 2016

On Tuesday, May 24, 2016, soybean rust was detected on kudzu in Amite, Pike and Wilkinson counties in southwest MS. The observations of soybean rust yesterday mark the earliest appearance of the disease by a little more than 6 weeks as compared to the past. No specific management practices are suggested at this time.

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Flooded soybean fields – Do I need an inoculant?

Flooded soybean fields – Do I need an inoculant? Updated

🕔10:12, 13.Apr 2016

Soybean is a leguminous crop that obtains its nitrogen (N) from an association with a bacterium in the soil called Bradyrhizobium japonicum. The association between the soybean and the bacterium takes place in nodules that form on the soybean roots

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Managing PPO-resistant Palmer Amaranth in Mississippi Soybean

Managing PPO-resistant Palmer Amaranth in Mississippi Soybean Updated

🕔09:19, 25.Mar 2016

Suggested herbicide programs in Mississippi soybean have been updated to address multiple resistance to glyphosate, ALS, and/or PPO herbicides in Palmer amaranth.

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Update: Disease Ratings for 2015 MSU-ES Soybean Variety Demo Program Updated

🕔20:51, 4.Dec 2015

The results of the 2015 MSU-ES Soybean Variety Demonstration Program have been updated to include disease ratings for Cercospora blight, frogeye leaf spot, Septoria brown spot, and Target spot. These evaluations were collected at many locations in 2015 by Dr.

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Soybean Variety Suggestions for 2016 Updated

🕔20:37, 4.Dec 2015

Variety selection is one of the most critical management decisions associated with soybean production. Factors such as soil type, planting date, irrigation capabilities, row spacing, harvest capacity, and others may influence the decision of selecting an appropriate variety for profitable

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Tri-State Soybean Forum – January 8, 2016 Updated

🕔20:11, 4.Dec 2015

The 60th Annual Tri-State Soybean Forum will be held at Mississippi State University’s Delta Research and Extension Center on January 8, 2016. Registration will begin at 8 a.m. followed by the program at 8:30. Presentations will include pertinent information for

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2015 MSU-ES Soybean Variety Demonstration Program Results

2015 MSU-ES Soybean Variety Demonstration Program Results Updated

🕔11:46, 31.Oct 2015

The On-Farm Soybean Variety Demonstration Program is conducted using a set of varieties with proven performance.  These varieties are grown in a production setting on various soil types and management systems around the state. Demonstration sets for both maturity group

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Soybean Disease Update: September 5, 2015

Soybean Disease Update: September 5, 2015 Updated

🕔06:48, 5.Sep 2015

Soybean diseases continue to be observed throughout the MS soybean production area. The number of counties (13, as of 9/4/2015) exhibiting soybean rust has increased over the past several days. However, low levels of infection have been observed at most locations. Frogeye leaf spot, Cercospora blight, target spot, and stem canker also continue to be observed.

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Soybean Harvest Aids

Soybean Harvest Aids Updated

🕔21:18, 28.Aug 2015

Several calls have come in over the last week regarding soybean harvest aid options for various scenarios. In some cases, fields have been observed with varying degrees of maturity. In these situations, the majority of the pods observed across the

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Mississippi State University Turn Row Talk – Clarksdale, August 25, 2015

Mississippi State University Turn Row Talk – Clarksdale, August 25, 2015 Updated

🕔14:57, 20.Aug 2015

An agronomic crops field day will be held at Stovall farms, west and north of Clarksdale on Oakhurst Stovall Road. The field day will be held at Mr. Pete Hunter’s farm shop beginning at 10 am. MSU Extension Specialists will be present to discuss topics in corn, cotton, grain sorghum, peanut, rice and soybean.

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Dectes Stem Borer: Biology, Damage, and Management in Soybeans

Dectes Stem Borer: Biology, Damage, and Management in Soybeans Updated

🕔09:49, 8.Aug 2015

There have been numerous calls and questions about Dectes Stem Borer over the last few years. It seems that numbers are increasing each year. This is not surprising when you consider the biology of the insect coupled with an increase in soybean acres in MS.

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Late-Season Soybean Growth Stages

Late-Season Soybean Growth Stages Updated

🕔20:05, 1.Aug 2015

Corn harvest is begining across the Delta and early-planted soybean harvest won’t be far behind.  Identifying late-season soybean growth stages is important for a number of considerations, such as irrigation termination and harvest aid/desiccation timing decisions. Growth Stage R6- Full

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Soybean Disease Update: July 18, 2015

Soybean Disease Update: July 18, 2015 Updated

🕔06:26, 18.Jul 2015

The soybean disease situation has not changed much over the past week, but as the crop matures more diseases will likely be observed throughout the state. At present, brown spot, frogeye, the mystery disease, and a few other minor issues can be observed in most soybean fields.

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