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Category Posts for Physiology

22
May
2015
Soybean Research Verification Program Update for May 22, 2015
Author: Chris Grimes, Program Associate - Soybean/Wheat Verification Coordinator

General The rainfall across the state over last weekend has kept the fieldwork to a minimum this week. As a result of that we haven’t had any more verification fields planted this week. The fields that have been planted are off to a good start and progressing well. We have one field that is at […]

18
May
2015
Rice Research Verification Program Update – May 15, 2015
Author: Jarrod Hardke, Rice Extension Agronomist

South Arkansas: Three fields Chicot, Desha and Arkansas Counties have received N-STaR fertilizer applications and are being flooded. The Jefferson County field is cracking and all other fields are from 4 leaves to tillering stage. A low uneven hybrid stand (1 leaf – tillering) in Chicot County made it difficult for management decisions. Pre-emergence herbicides […]

18
May
2015
Why Peanut Seedlings Have Yellow Leaves
Author: Travis Faske, Extension Plant Pathologist

There have been a few reports of peanut seedlings emerging with yellow or light-brown leaves in a few fields across the state. There are a few reasons for this leaf discoloration; planting seed into cool (<65ºF), wet soils that slows emergence, planting depth, cold weather injury, and prolonged cloudy, rainy conditions during emergence that limits […]

11
May
2015
It’s time to sidedress grain sorghum
Author: Leo Espinoza, Associate Professor & Extension Soil Scientist

If your grain sorghum emerged about 30 days ago, it is entering into the growing point differentiation or reproductive stage. Around this time, the total number of leaves is being defined and nitrogen needs to be in place as the plant will start using nitrogen rapidly. Grain sorghum seems to be more sensitive than corn […]

08
May
2015
Soybean Research Verification Program Update for May 8, 2015
Author: Chris Grimes, Program Associate - Soybean/Wheat Verification Coordinator

There are 20 fields enrolled in the Soybean Research Verification Program this year and 7 have been planted to date. We anticipate having 17 roundup ready fields, 1 liberty link field, and 2 conventional fields in the program this year. The fields that have been planted are either up or on their way. Hopefully there […]

04
May
2015
Rice Research Verification Program Update – April 30, 2015
Author: Jarrod Hardke, Rice Extension Agronomist

South Arkansas:   All nine verification fields have been planted. Eight of the nine fields have stand counts while the Jefferson County field was being planted today 4/30. Sunshine and warm weather finally has rice moving. Pre-emergence herbicides have been activated and continue to control grasses, sedges, broadleaves and aquatics. Post-emergence herbicide applications will start […]

20
Apr
2015
Rice Research Verification Program update for April 20, 2015
Author: Jarrod Hardke, Rice Extension Agronomist

South Arkansas: Six of the nine fields have been planted. Two fields have stand counts while three fields are spiking. While the rain held off planting for some it has been very positive for pre-emergence herbicide activation. North Arkansas: More wet weather has continued to prevent dry-land planting for all but a few fields everywhere […]

15
Apr
2015
Bacterial panicle blight of rice in Arkansas
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

About the Disease Bacterial panicle blight (BPB) is an important disease in Arkansas rice that has caused huge losses over the years, including 1995, 2010 and 2011. The cause was identified about 1996 by LSU scientists, but the problem has likely been around for a long time in the United States, often called something else. […]

06
Apr
2015
Managing seed rots and seedling diseases of rice
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

Seed Rots Seed rotting microbes can be associated with seeds from storage, fields from the previous season, or soil and water through secondary infection. Rotting seeds become mushy and may be surrounded by gooey substances or white moldy growth due to microbial activities (Figure 1). Certain environmental conditions such as puddled spots also favor seed […]

24
Mar
2015
Reduce the risks caused by major rice diseases
Author: Yeshi Wamishe, Extension Rice Plant Pathologist

Planning ahead not only should help you manage your fields adequately but also minimize disappointment at harvest. Remember the “disease triangle” of weather, varietal susceptibility, and the presence or absence of pathogens as the three major factors that play a role for plant disease occurrence. Pathogens can be brought to a field from various sources: […]