A substantial number of soybean acres have been reported to be affected by seedling disease. However, the majority of the field seedling issues can be blamed on poor environmental conditions following the planting that occurred around Easter (between April 14 and 19) and some of the residual herbicide products applied.
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.
RISER irrigation approach reduces water use by 50% while maintaining yield potential.
The results from the Second Annual Future of Ag Graduate Student Competition are included in this post.
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.
On February 6th 2014, Mississippi State University will host the second annual “Future of Agriculture Graduate Student Competitionâ€. The competition will be open to M.S. and Ph.D. students working in production agriculture.
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.
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 other crops grown all can influence the decision for selecting an appropriate
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.
While weeds can create problems for harvest equipment, many producers see the benefit of a harvest aid in creating a more rapid and efficient harvest in the absence of weeds
Over the last month we have had numerous questions about terminating stink bug applications in late season soybeans. Typically we manage stink bugs until near harvest but there are several things to consider before making an application to control stink bugs in beans beyond R6 growth stage.
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).
Determining when to terminate irrigation in soybean can be difficult. When making this decision, the goal is to make sure that adequate soil moisture is available to ensure that the soybean seeds reach maximum size. Terminating irrigation too soon can
Now that early planted beans are drying down quickly and insect pressure is increasing on late planted soybeans in some areas, many are asking when it is safe to quit spraying insect pest in soybeans. For most pest in soybean
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.
Terminating soybean irrigation too early can result in lower yield due to decreased seed size. At the same time, irrigating when the crop no longer needs water can be a waste of time and resources. On Friday, August 30, 2013
Frogeye leaf spot continues to be one of the main foliar diseases observed in the 2013 soybean crop. In several situations a fungicide has applied and frogeye continues to be an issue. In the current blog post several pieces of information are included to help aid decisions in whether or not a particular variety may be susceptible or resistant to frogeye. In addition, a table of the labeled fungicide products for use to prevent yield loss as a result of frogeye leaf spot are included.
The Soybean Minute is a new radio program that can be heard on the Mississippi AgriNews Network. These reports, sponsored by the Mississippi Soybean Promotion Board and the United Soybean Board, offer the latest information on soybean production in Mississippi.
Once again this season soybean rust has been detected early in July. A single infected leaf was discovered in a soybean sentinel plot in Pearl River County on Tuesday, July 9, 2013. Historically this is 4 days earlier than last season (2012) and 2 days earlier than the earliest occurrence of rust in MS that occurred in 2007 on kudzu. At present, no additional management scenarios are necessary. We continue to scout to determine how widespread infection may be across south MS.
Over the past two weeks soybean diseases have become apparent throughout the MS soybean production system. Isolated reports of frogeye leaf spot in reproductive maturity soybean fields as well as Fusarium wilt have been on the rise. Stay tuned to the Mississippi Crop Situation Blog for disease monitoring situations, including maps of counties where soybean rust and strobilurin-resistant frogeye have been made throughout the 2013 season.
At this point of the season, we still have some acres of soybean yet to be planted. The majority of those acres will be double cropped soybean behind harvested wheat. Given the environmental conditions that we typically expect during this
Over the past week we’ve received two reports of frogeye leaf spot in reproductive soybeans. In both cases, a susceptible variety was planted and frogeye leaf spot symptoms can be clearly distinguished throughout the canopy. Following the observation and reports of strobilurin-resistant frogeye leaf spot in two fields in MS last year, and from adjacent states, it is most important to determine what particular soybean variety is planted in a field prior to making a decision on a specific fungicide product for yield loss prevention.
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