Updated January 4, 2021:
Final Report:
For the 2020 season, we began sampling kudzu sites in Hampton and Allendale County the first week of April. Sampling of soybean monitoring plots at the early bloom growth stage started the week of July 8th. We continued to sample soybean fields as part of the official sampling until October 6, 2020. To fully document the spread of ASR in SC during 2020 we continued sampling until the end of October. Sampling consisted of agents colleting and examining soybeans leaves from 6 to 10 fields located across the southwestern counties of SC, a total of 75 leaves were collected from each location.
ASR was detected in SC on kudzu on May 10th by, Joe Varn, in Hampton County. This was the first find of ASR in kudzu in SC in approximately five years. With the early arrival of ASR in kudzu we sampled kudzu across the Southwestern part of South Carolina until early planted soybeans began to bloom. Sampling of soybeans began on July 5th and the first News Note was sent out to growers, agents and agricultural industry representatives on July 13, 2020.
The early find of ASR in kudzu did not led to a detectable early infection in soybeans in SC. The first ASR identified in soybeans in SC occurred on September 1st, in Bamberg County. This was identified by Joe Varn. At that time weather conditions were conducive for the spread of ASR in SC and we made recommendation in the News Note that soybean growers should consider the use of foliar fungicides for the control or prevention of ASR on soybeans with high yield potential that were in the R4 to R5 growth stage.
On October 6th, final news note, we had identified ASR in Bamberg, Barnwell, Calhoun, Dorchester and Orangeburg Counties on soybean. Agents expanded the sampling area to include more area in SC. At the conclusion of sampling at the end of October ASR had been identified in Bamberg, Barnwell, Berkeley, Calhoun, Colleton, Dorchester, Edgefield, Lee, Kershaw, Newberry, Orangeburg, Saluda, and Sumter Counties.
Due to the uncertainty of 2020 and lower prices of soybeans during the 2020 growing season many acres of soybeans were not treated with a foliar fungicide. In some late planted fields in Calhoun and Colleton county that were not treated with a fungicide ASR did cause early defoliation and impacted the finale yield of those fields. We are estimating a 10% reduction in yield in these fields, due to the early defoliation.
For the 2020 season, we began sampling kudzu sites in Hampton and Allendale County the first week of April. Sampling of soybean monitoring plots at the early bloom growth stage started the week of July 8th. We continued to sample soybean fields as part of the official sampling until October 6, 2020. To fully document the spread of ASR in SC during 2020 we continued sampling until the end of October. Sampling consisted of agents colleting and examining soybeans leaves from 6 to 10 fields located across the southwestern counties of SC, a total of 75 leaves were collected from each location.
ASR was detected in SC on kudzu on May 10th by, Joe Varn, in Hampton County. This was the first find of ASR in kudzu in SC in approximately five years. With the early arrival of ASR in kudzu we sampled kudzu across the Southwestern part of South Carolina until early planted soybeans began to bloom. Sampling of soybeans began on July 5th and the first News Note was sent out to growers, agents and agricultural industry representatives on July 13, 2020.
The early find of ASR in kudzu did not led to a detectable early infection in soybeans in SC. The first ASR identified in soybeans in SC occurred on September 1st, in Bamberg County. This was identified by Joe Varn. At that time weather conditions were conducive for the spread of ASR in SC and we made recommendation in the News Note that soybean growers should consider the use of foliar fungicides for the control or prevention of ASR on soybeans with high yield potential that were in the R4 to R5 growth stage.
On October 6th, final news note, we had identified ASR in Bamberg, Barnwell, Calhoun, Dorchester and Orangeburg Counties on soybean. Agents expanded the sampling area to include more area in SC. At the conclusion of sampling at the end of October ASR had been identified in Bamberg, Barnwell, Berkeley, Calhoun, Colleton, Dorchester, Edgefield, Lee, Kershaw, Newberry, Orangeburg, Saluda, and Sumter Counties.
Due to the uncertainty of 2020 and lower prices of soybeans during the 2020 growing season many acres of soybeans were not treated with a foliar fungicide. In some late planted fields in Calhoun and Colleton county that were not treated with a fungicide ASR did cause early defoliation and impacted the finale yield of those fields. We are estimating a 10% reduction in yield in these fields, due to the early defoliation.