Episode 21 of Battle for the Belt is now available: https://www.youtube.com/watch?v=D00P9mJ3ylc
In Episode 21, Dr. Horacio Lopez-Nicora, the Ohio State Soybean Pathology Extension Sepcialist, discusses soybean vein necrosis virus. If you would like to read more about the virus please click on the link below to read a recent newsletter article by Dr. Lopez-Nicora, Soybean Vein Necrosis Virus and Downy Mildew | Agronomic Crops Network (osu.edu)
What’s happening in the field?
The crops at all locations are steadily progressing (Figure 1 and Figure 2). Drought conditions have been limited at all three research locations.
Western
At the Western location last week, across the first four planting dates, soybean was at the R5 stage. There were symptoms of soybean sudden death syndrome in a few plants that were planted on March 25 and April 16. This is the time of year that these end of season diseases begin to show themselves. If you would like to read more about sudden death syndrome of soybean please click on this link Sudden Death Syndrome of Soybean | Ohioline (osu.edu). For corn, there were some plants in planting date one (March 25) that were at R6 but the average stage was R5 for planting date one through three. The late June planted corn is at R1 and beginning grain fill now.
Northwest
The Northwest corn stage for planting date one is R4, planting date two is R3, planting date three and four are at R1 and planting date five has not started to put on silk yet and is at V14. Disease pressure is very low at this location. Soybean plants are mostly at the R5 stage except for planting date four and five, which are at the R4 and R3 stage, respectively. Defoliation by insects at this location is also low.
Wooster
At the Wooster location, the first planting date of corn began to dent, with planting date two at R4, planting date three at R3, planting date four at R1, and planting date five is in late vegetative stages. Planting date one, two, and three in soybeans are at R5 with planting date four at R4 and planting date five at R3. There has been no frogeye leaf spot disease at this location and only some gray leaf spot in corn. Insect and disease pressure is low here as well.
The summary of locations, last week’s weather, planting dates, GDDs and stages is presented in Table 1.
Table 1. Weekly weather conditions for each planting date at the Western Agricultural Research Station, Northwest Agricultural Research Station, and Wooster Campus, with the day of planting, soil, air temperature averages, and Growing Degree Days (GDDs) from August 12th to August 18th. Information from CFAES Weather System (https://weather.cfaes.osu.edu/).
