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15
Sep
2014
Peanut Disease Update: Sclerotinia blight caused by Sclerotinia sclerotiorum confirmed in Arkansas
Author: Travis Faske, Extension Plant Pathologist

Sclerotinia blight caused by Sclerotinia sclerotiorum was confirmed earlier this month in a commercial peanut field near Pocahontas. Sclerotinia blight symptoms were recognized by Gordon Drennan with the Clint William Co. and confirmed by extension plant pathologist on a runner peanut cv. Florun107. Symptomatic plants were observed in several large (2’ x 5’) foci with […]

03
Jul
2014
Rice diseases in “underwater” rice
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

Rice fields in some counties are “underwater “due to the excessive rain in the last days of June.  As I drove (07/02/14) in Monroe, Woodruff, and St. Francis Counties, I saw fields of soybean and rice covered with water (Pictures 1, 2, 3, 4).  Information on soybean conditions has been given at http://www.arkansas-crops.com/2014/07/02/flooded-replanting-considerations/. Though not […]

02
Jul
2014
Flooded soybean fields and late replanting considerations
Author: Jeremy Ross, Extension Agronomist - Soybeans

Due to the excessive and record-breaking rainfall that occurred early Sunday morning, many fields in an area covering Prairie, Woodruff, Jackson, Monroe, St. Francis, and Cross Counties have been flooded or are still under water.  Currently, we are estimating that 100,000 acres of soybeans will need to be replanted, with many more soybean fields receiving […]

01
Jul
2014
Insect update: Sugarcane aphid, fall armyworm, rice water weevil, plant bugs
Author: Gus Lorenz, Extension Entomologist

Grain Sorghum Last Friday we went to Chicot and Ashley County looking for sugarcane aphid. It has been previously found in MS, LA, TX and OK. So, it should be no surprise that we had no trouble finding it. In fact, the first field we checked our new SEREC entomologist, Nick Seiter, found it fairly […]

26
Jun
2014
Rice blast alert: Disease has been reported in Arkansas
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

Blast is one of the devastating diseases of rice. The blast pathogen is air, seed, or residue-borne. Seed and air-borne pathogens can easily move long distances. Air-borne spores usually infect young leaves. Spores from young leaves may infect collars, nodes, and panicles of rice. Sometimes when the first emerged leaves dry and die back, blast […]

26
Jun
2014
Peanut producers: Spotting leaf spot diseases and fungicide timing for southern blight
Author: Travis Faske, Extension Plant Pathologist

Though it is very common to find spots on peanut leaves in Arkansas, the disease called early leaf spot (ELS) of peanut (and late leaf spot of peanut) has yet to be confirmed in the state. Herbicide injury is most commonly mistaken for ELS (Figure 1). Early leaf spot is caused by the fungus Cercosproa […]

03
Jun
2014
Managing Flood-sensitive Disorders in Rice
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

Starting the past couple of weeks, water is being  pumped into rice fields.  The rain last week has been a plus to establish permanent flood in some fields.  With the preflood nitrogen applied (perhaps more than the recommended amount) and temperatures rising, rice starts to move faster and will soon reach the reproductive stage.  Sheath […]

17
Apr
2014
Tips for Managing Rice Seedling Diseases
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

Seedling diseases can prevail in any rice field. However, their likelihood can be reduced with proper management. Seed rots and seedling diseases are generally “complex” meaning there can be more than one causal agent in a field. In fields with seedling problems, pathogen structures such as mycelia may easily be detected on the collar of […]

02
Apr
2014
Managing bacterial panicle blight: Research gives helpful clues
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

“Be proactive” – this is the best approach to beat the unexpected effects of sporadic diseases such as bacterial panicle blight (BPB) of rice.  Looking back, the rice yield and quality losses we had in 2010 and 2011 were enormous.  Having most of the conventional varieties still susceptible to BPB and with no chemical options […]

05
Mar
2014
Plan ahead to make profitable decisions about rice disease management
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

I hear some saying that the crop season in 2014 will be a “normal” one following such a severe winter.  Although I did not like the winter, my wish is that the cold temperature has effectively suppressed rice pathogens.  However, since we cannot be sure of this and the source of inoculum for all diseases […]