Delta Research and Extension Center’s Corn/Soybean (July 19) and Rice (July 31) Agronomic Crop Field Days
The DREC will be holding two separate field days, one for corn and soybean on July 19 and one for rice on July 31.
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Disease
Corn Disease Update: June 7, 2012
Over the past few days reports of northern corn leaf blight and gray leaf spot have increased in the MS corn crop. However, common rust is still the only rust that has been observed in MS. Keep in mind that in some cases common rust, on the lowest leaves in the corn canopy, can take on the appearance of southern rust.
Peanut Disease Update: week of May 27 – June 1.
Before getting to the state disease summary, a quick note on two diseases common at this time of year, Pepper Spot/Leaf Scorch and funky leaf spot (FLS). Funky Leaf Spot is important because the early symptoms can be confused with
Corn Fields Having Sustained Hail Injury May not Benefit from a Foliar Fungicide
Over the past several weeks we’ve encountered tremendous hail damage in corn fields. Leaf shredding is one of the more common symptoms associated with hail injury and the greatest source of yield loss as a result of hail injury (see:
Don’t Sweat the Small Stuff: Disregard those Purple to Black Spots Against the Corn Stalk at the Base of the Leaf Collar
Over the past few weeks numerous maladies have been observed in corn that don’t require a management decision. One of our more common issues, purple leaf sheath, is simply present under the right environmental conditions and when nutrients become available for the organisms that produce the minor staining on the corn plant.
Cotton Seedling Disease
Seedling disease has been making an appearance in isolated pockets over the past week to ten days. Primarily we have been observing Rhizoctonia, also known as soreshin, on cotton in the north Delta. Seedling disease, caused by Rhizoctonia solani, is
Corn Diseases to Watch for While Scouting Corn
Scouting corn can be especially challenging. Looking for disease within the corn canopy can take a tremendous amount of time and should be done a little different depending on the particular crop stage encountered. Once an ear has set (post-tassel) focusing on the ear leaf and above is generally the best scouting method since protecting the ear leaf is important. I’ve included several descriptions and pertinenent information regarding some of the more commonly encountered diseases in our corn production system.
Southern Blight of Soybean Observed in a Few Isolated Fields
Over the past week a few soybean fields in the Delta have been observed with the characteristic symptoms and signs of southern blight. Typically, southern blight is a disease of rare occurrence; however, the prevailing environmental conditions seem to be causing added stress and increasing the incidence of this particular disease.
Corn Disease Update and Tassel Fungicide Decisions: May 15, 2012
The corn crop appears to be much earlier this year than it has over the recent past. I’ve driven by numerous fields from south Washington County to north Bolivar County where almost 100% of the field has reached the tasseling
Thrips in Peanuts and Their Impact on Tomato Spotted Wilt Virus (TSWV)
There have been a lot of questions recently about thrips control in peanuts. In general, thrips will not hurt peanut yields except in EXTREME situations. Peanut seedlings are relatively vigorous compared to most of the crops grown in Mississippi. Foliar insecticide applications, though rarely needed, should be based on plant injury rather than thrips numbers.
Soybean Seedling Disease Identification: Pythium Damping-off and Root Rot
Environment is the key component in the expression of every plant disease. Especially when considering the occurrence of seedling diseases we typically have a situation in place where inoculum is present in the soil, more than likely in high quantities,
Corn Holcus Leaf Spot Occurring in the Central Delta
Holcus leaf spot, a leaf spot of corn caused by a bacterium, has been confirmed across a wide geographic area in the Mississippi Delta over the past two weeks. The disease is typically characterized by numerous cream to white lesions on the corn leaf that can oftentimes be confused with herbicide (paraquat) drift.
Septoria Leaf Blotch, Stagonospora Leaf and Glume Blotch, and Bacterial Leaf Streak of Wheat
In addition to the wheat rusts we’ve been observing over the past few months throughout our wheat production area, numerous additional foliar disease have been observed. The abnormally warm temperature and heavy dews we’ve experienced over the past several weeks have allowed several other wheat diseases to occur.
2012 Mississippi Soybean Sentinel Plot Program
Sentinel plots will continue to be used to monitor for yield-limiting diseases throughout MS during the 2012 season. Even though in the past sentinel plots have more typically been used to monitor for the presence of soybean rust, the plots will be used to monitor for all economically important soybean diseases.
Current Wheat Rust Situation: April 12, 2012
Heavy leaf and stripe rust sporulation continues to be a concern throughout much of the wheat production area in MS.
Wheat Disease Update: March 29
Wheat diseases continue to be identified throughout the MS production area. Barley yellow dwarf virus, leaf rust, powdery mildew, and stripe rust are all present in limited situations in several counties.
Wheat Leaf Rust and Stripe Rust Update: March 2, 2012
Over the past two weeks the reports of both stripe and leaf rust of wheat have increased in MS. The following blog article provides information regarding the developing situation. The continued unseasonably warm environmental conditions may contribute to an increase in stripe rust severity this season.
2011 Rice Research Report
This is a brief review of the many agronomy, breeding, pest management, soil fertility, and water conservation research projects funded by the Mississippi Rice Promotion Board.
Stripe Rust Detected in Mississippi Wheat
Stripe rust was detected in a Bolivar County wheat field last Monday morning (January 30, 2012). The report is the first of stripe rust from MS in 2012 and the second report of the disease from wheat east of the Rocky Mountains.
2011 MSU Row Crop Short Course Video Links
The 2011 Mississippi State University Row Crop Short Course was held from December 5 – 7, 2011. Topics covered during the Row Crop Short Course included insect and weed management, fertility management, agronomic aspects of crop production, and a farm
Seed Treatment Options for Cotton, Soybeans, and Corn
The numerous options for seed treatments can sometimes be confusing. They also change depending on what company you are buying from. Generally, they all perform well for what pests they are targeting but there are differences that you need to be aware of. Below is a link to an article Scott Stewart, The University of Tennessee, posted that breaks down most of the options very clearly.
Delta Ag Expo Set For January 17-18 In Cleveland, Mississippi
You are invited to the 2012 Delta Ag Expo. The Delta Ag Expo provides farmers and others interested in agriculture an opportunity to see the latest technology in agricultural products, services, and information. You will have the opportunity to view agricultural exhibits and talk with extension and research personnel and get up-to-date information for planning your crop year.
2011 Rice Short Course Presentations and Preliminary Rice Variety Trial Booklet
I would like to thank everyone for attending the Rice Short Course. At much request, I have included copies of the presentations made at this short course. Also, I have attached a preliminary copy of the Rice Variety Trial Booklet.
2011 Row Crop Short Course
On behalf of the Mississippi State University Extension Service we would like to cordially invite you to attend the 2011 Row Crop Short Course to be held at the Bost Extension Center on the campus of Mississippi State University from
Cercospora Blight of Soybean, the Cause of Premature Leaf Browning and Defoliation
Severe Cercospora blight coupled with cooler temperatures as will as a cool north wind worked to defoliate soybean plants prematurely following Tropical Storm Lee.
