Two upcoming peanut field days offer the latest research recommendations and a chance to see some research/demonstration plots. The first field day will be held in south Mississippi, at Lucedale, the other in north Mississippi, at Clarksdale.
The Lucedale field day will be held on Thursday, August 29. Registration starts at 8:30 am at the George County . . . → Read More: Two Upcoming Peanut Field Days
This last week I found early leaf spot in the Greater Columbus, Mississippi area. For information and images on how to identify early leaf spot, please see: http://www.mississippi-crops.com/2013/08/12/early-leaf-spot-of-peanut/ and http://www.mississippi-crops.com/2012/09/05/early-leaf-spot-found-in-the-greater-aberdeen-area/
Early and late leaf spot are major defoliators of peanuts and can be responsible for significant yield losses. In fact, these two diseases are the . . . → Read More: Early Leaf Spot of Peanut found in the Greater Columbus Area
Is caused by a fungus, Cercospora arachidicola.
Defoliates infected leaflets fairly quickly.
Is one of the reasons, along with late leaf spot, for the development of the traditional two week spray schedule in established peanut growing areas (see Figure 1).
Usually infects upper side of leaf.
Often surrounded by a chlorotic ring with a dark chocolate brown center.
Conidiophores are . . . → Read More: Early Leaf Spot of Peanut
This note links to four documents (pdf format), each of which lists the fungicides labeled for use on Mississippi grown peanuts as of February, 2013. The first document lists the fungicides by Trade Name. The second pdf lists the fungicides by Active Ingredient, the third by FRAC code (Fungicide Resistance Action Committee code) whereas the fourth . . . → Read More: 2013 List of Peanut Fungicides Labeled in Mississippi
Frost and Peanuts: What to do and What not to do
Are you still digging peanuts? If so, is there a frost in your forecast? Dug peanuts that are not yet well air dried are quite susceptible to frost injury. If the peanuts have been dug (inverted) for at least three GOOD drying days (warm temperatures) then . . . → Read More: Frost and Peanuts: What to do and What not to do
Description and symptoms. Yesterday I looked at some defoliating fields in the greater Aberdeen vicinity. The vines looked like someone had used a set of hedge shears to remove the foliage from between the rows and thin it in the center of the row (Figure 1). The foliage had been fully covering the center of the . . . → Read More: Early leaf spot found in the greater Aberdeen area
As of Sunday evening, it appears that Tropical Storm Isaac will slow, turn into a hurricane, and hit our Gulf Coast sometime Tuesday. Rainfall amounts are forecast in inches below I-20 and tropical storm conditions are expected to prevail for a substantial period through a good portion of Mississippi.
We have a good crop in the ground, . . . → Read More: Predicted conditions surrounding Isaac favor diseases of peanut
As a Plant Pathologist, I tend to divide the peanut crop in Mississippi into growing areas based on the “climate” and soils. Both influence the type and amount of disease pressure experienced in that growing area and, incidentally, quality and yield ;) Looked at this way, Mississippi’s major growing areas are George County (Lucedale vicinity), south . . . → Read More: Week of August 10 Peanut Crop Update
Current update Last of July/First of August and Tropical Storm Ernesto Advisory
White mold began germinating and growing on dead organic matter in the south about 18 days ago in south central Mississippi, but really started to kill plants in this last week in the Delta, Hattiesburg and Lucedale areas. I have not yet seen any . . . → Read More: Last of July/First August Update and Ernesto Advisory
Discusses the life cycle, management and identification of white mold or southern stem rot of peanut caused by Sclerotium rolfsii. It includes a section on how to distinguish it from a white mold look-alike.
Southern stem rot or white mold . . . → Read More: Southern stem rot or white mold of peanut