Wheat diseases remain extremely scarce throughout the MS wheat production system to date. No leaf rust, stripe rust, or Septoria have been observed to my knowledge. However, bacterial leaf streak has become a regular observation in most wheat fields.
Wheat diseases have been essentially non-existent this winter. No rust to report and very little of much any other foliar diseases is great news for our wheat farmers.
Strobilurin-resistant frogeye leaf spot continues to be a topic of conversation. During 2012 two MS counties were confirmed to have strobilurin resistant frogeye leaf spot. Since that time a large survey has been conducted in MS to determine how widespread the resistance is within the fungal population in MS.
Fungicides have become an important management alternative for diseases such as frogeye leaf spot. However, with the addition of the strobilurin-resistant fungus responsible for frogeye leaf spot, caution must be taken when applying fungicides to not increase the likelihood of fungicide resistance from developing. The specific characteristics of the main fungicide classes labeled for application in soybean systems are outlined. In addition, a table that includes the specific components of the pre-mix products when the labeled rates are applied is included.
Fungicide resistance has continued to be a hot topic during the off-season. Since 2010, fungicide resistance within the frogeye leaf spot fungal population has been documented in several states including Mississippi. To prevent the development of fungicide resistance from increasing several important steps can be followed. Several of these specific topics will be outlined in this three part series regarding fungicide resistance.
Recently several groups in Mississippi came together and developed then adopted a set of Cooperative Standards for row crop farmers and beekeepers in an effort to increase awareness of pollinator’s and create an environment where each could coexist while minimizing any
During 2013, several fungicide trials were conducted to determine the benefit of vegetative growth stage timings in corn. Two large plot trials were conducted in east MS with the help of Dr. Dennis Reginelli. In this blog post, the results of two large plot trials were presented from one nonirrigated and one irrigated field setting. Small plot trial data will be reported at a different date.
In Mississippi, research indicates that management of medium-grain varieties is similar to that of long-grain varieties.
The 62nd annual Mid-South Farm & Gin Show will be held February 28 – March 1, 2014 at the Cook Convention Center in Memphis, TN. More than 400 exhibitors from more than 40 states will be on-hand showcasing the latest
Over the last several years we have seen a consistent response in wheat yield when a pyrethroid was used during the late winter months (late January-February). Often when this application goes out it is very difficult to find aphids at
The results from the Second Annual Future of Ag Graduate Student Competition are included in this post.
Over the last several years there has been a media blitz surrounding the decline in honey bee populations around the globe. It seems like the science changes daily as to cause of the problem. Most believe it is a complex
Included in this blog post are ratings collected for frogeye leaf spot as well as Cercospora blight from the 2013 Maturity Group V soybean variety trials. Trials were conducted in Brooksville, Clarksdale (irrigated), Falkner, Longwood, Olive Branch, Raymond, Stoneville (clay and loam). The conventional/LibertyLink trial was only conducted at the Brooksville, Falkner, Longwood, and Stoneville (clay) locations. Ratings were collected based on a 0-9 and are presented from each location for each variety so a range of ratings is available across all environments encountered during the 2013 season.
Included in this blog post are ratings collected for frogeye leaf spot as well as Cercospora blight from the 2013 Maturity Group IV soybean variety trials. Trials were conducted in Brooksville, Clarksdale (irrigated), Falkner, Longwood, Olive Branch, Raymond, Stoneville (clay and loam). The conventional/LibertyLink trial was only conducted at the Brooksville, Falkner, Longwood, and Stoneville (clay) locations. Ratings were collected based on a 0-9 and are presented from each location for each variety so a range of ratings is available across all environments encountered during the 2013 season.
Attached please find the agenda for the Delta Ag Expo in Cleveland, MS. Make careful note that the dates of the meeting have changed from previous years due to a minor scheduling conflict with the Bolivar County Exposition Center.
Attached in this blog post are the variety trial results from the North Mississippi Research and Extension Center in Verona, MS. Harvested yield as well as variety response to natural infection from Cercospora blight and frogeye leaf spot are included in the associated tables.
The 2013 Row Crop Short Course will be held at the Bost Extension Center on the campus of Mississippi State University from December 2 – 4, 2013. The 2013 Row Crop Short Course will begin with an irrigation symposium hosted
Each year some sweetpotato scurf or “soil-stain†is reported. However, this year it would appear that the disease has been more prevalent than normal in some fields. Scurf is caused by a soil-dwelling fungus, Monilochaetes infuscans, and results in darkened,
The 3rd annual joint MEA/MAPPAN/MWSS annual meeting will be held next week at the Bost Extension Building in Starkville, MS next week. The dates of the meeting are Monday and Tuesday October 21-22. We have a very informative and exciting
Virus-infected soybean material has been observed almost statewide this season. The high numbers of bean leaf beetles can be blamed for some of the observed viruses; however, bean leaf beetles are not the only insects that can vector soybean viruses between plants. This specific blog update presents information on the three most commonly encountered soybean viruses in the MS soybean production system.
Soybean disease questions still consider to be raised throughout MS. Even though soybean rust has been detected in 45 counties to date it appears we will have another season where yield losses as a result of soybean rust will be extremely limited and may only have occurred in a handful of fields. When making plans for next year consider sampling for nematodes in light textured soil classes. In addition, planting a frogeye susceptible variety in several years in a continuous soybean system may increase the likelihood of frogeye causing substantial yield loss.
Numerous questions have come in over the past few weeks regarding proper grain storage. Maintaining moisture below 15% is extremely important to reduce the likelihood of fungal growth. However, not all fungi that develop on harvested grain are problematic and toxin production is not something that can occur overnight. Even though fungi such as Aspergillus flavus can produce a green fungal growth on harvested grain not all fungi that grow on grain can be considered to be A. flavus.
Red crown rot has been identified in additional fields in east MS throughout the 2013 season. Prior to 2013 only two counties had been identified as having red crown rot. However, three additional counties have been added this season (Clay, Newton, Union). Red crown rot symptoms can be misdiagnosed as several other diseases, including sudden death syndrome (SDS).
Foliar diseases of soybean continue to be observed throughout the MS soybean production system. Over the past week additional counties containing soybean rust have been observed throughout the state. Stay tuned to information on the Crop Situation Blog regarding additional counties with soybean rust infected plant material should management suggestions change.
Numerous questions over the past few weeks regarding how well certain fungicide chemistries are managing frogeye leaf spot. Attached please find preliminary rating data from Starkville and Stoneville on how well particular products are managing observable symptoms of frogeye leaf spot. Additional data to follow as we continue to rate plots.
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