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Category Posts for Wamishe, Yeshi

28
Feb
2017
Rice blast-resistant varieties: The best defense is a good offense
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

By Yeshi Wamishe, Extension Rice Pathologist As we prepare to start the forthcoming season, planting fields with appropriate varieties is key to managing rice blast disease.   Rice blast disease can be well managed by planting relatively resistant varieties in fields with a history of blast. Planting blast-susceptible varieties in blast-prone fields can result in severe […]

06
Feb
2017
Fungicide resistance: an ongoing concern
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

  By Yeshi Wamishe and Travis Faske, Extension Plant Pathologists   During the 2011 cropping season strobilurin-resistant isolates of Rhizoctonia solon, the causal agent of sheath blight, were confirmed in a few rice fields in Louisiana. This is the same pathogen that causes aerial blight of soybean. This was an “alert” call for Arkansas rice and soybean […]

19
Aug
2016
Rice disease update: Rain exacerbating late season pressure
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

By Yeshi Wamishe, Extension Rice Pathologist Temperatures have been moderate with frequent rain in this couple of weeks.  Some rice diseases were also in progress. Sheath Blight Sheath blight still continues to move up in untreated fields likely causing some late season damage (Figure 1). You may be seeing heavy production of sclerotia by the […]

11
Aug
2016
Rice disease alert: Bacterial panicle blight and sheath blight on the upswing
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

By Yeshi Wamishe, Extension Rice Pathologist After the hot and dry weather for several weeks, in the last couple of weeks we got rain without a substantial decrease in day or night temperatures. Although it appeared good for rice crop, these conditions seemed to favor the development of bacterial panicle blight and sheath blight. We already […]

22
Jul
2016
Arkansas Rice Update 7-22-16
Author: Jarrod Hardke, Rice Extension Agronomist

Arkansas Rice Update Dr. Jarrod Hardke & Dr. Yeshi Wamishe July 22, 2016  No. 2016-19                www.uaex.edu/rice Crop Progress Upon looking at oil dripping from underneath his racecar, Robert Duvall in Days of Thunder looked at the car and said, “This is not the kind of answer I’m looking […]

22
Jul
2016
Rice bacterial panicle blight: what research has taught us
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

By Yeshi Wamishe, Extension Rice Pathologist and T. Gebrmariam, T. Mulaw, S. Belmar, C. Kelsey In the paradigm of plant pathology three factors are important for disease to occur. This includes the perfect alignment of a susceptible host with a virulent pathogen under favorable environment.  Some may associate environment only with weather. Sometimes, specific factors […]

09
Jul
2016
Arkansas Rice Update 7-9-16
Author: Jarrod Hardke, Rice Extension Agronomist

Arkansas Rice Update Dr. Jarrod Hardke & Dr. Yeshi Wamishe July 9, 2016  No. 2016-17                www.uaex.edu/rice Crop Progress Current conditions have the rice crop speeding along.  It’s not just your rice either, it’s everyone’s rice.  Daytime highs in the mid-90s and low temperatures staying above 70 have us […]

05
Jul
2016
Late-season rice blast: fungicide timing is key
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

By Yeshi Wamishe, Extension Rice Pathologist The rice blast fungus is a worldwide problem of rice that can cause near 100 percent yield loss in susceptible cultivars under favorable weather conditions if left unchecked. The blast fungus is very versatile and effective in its modes of survival. The fungus produces airborne spores that travel long […]

05
Jul
2016
Timing for application of protective fungicides to suppress rice kernel and false smut
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

By Yeshi Wamishe, Extension Rice Pathologist Rice fields having history of kernel and/or false smut applied with excessive nitrogen are prone to smuts in susceptible rice. Unfortunately under favorable conditions, most rice cultivars are susceptible including hybrid rice. False smut often is more severe in late planted rice since it is favored more by lower […]

30
Jun
2016
Fungicides for common rice diseases in Arkansas: Rates and compositions
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

By Yeshi Wamishe, Extension Rice Pathologist Since varietal genetic resistance is not always available for all diseases, cultural management strategies are highly recommended. However, in some instances, use of fungicides to reduce disease pressure has become inevitable in our rice production system.  To benefit the most from fungicide application the following pointers are suggested: Know […]