How Weather Influences Crop Disease Risks - RDA 312

What You Will LearnThe significant effects of weather on crop health and management decisions.Current disease pressures affecting summer crops in Oklahoma.The critical role of extension services in supporting farmers.Effective management strategies for maintaining crop health.Insights into specific diseases and their implications for crop production.Weather Effects on Crop ConditionsOklahoma has faced a hot summer with temperatures consistently exceeding 100°F. However, timely rainfall has positively influenced crop prospects, particularly for sorghum maturing rapidly. This highlights the delicate balance between weather conditions and crop health.Disease Pressure ObservationsInitial seedling diseases, particularly Fusarium infections, were noted in soybeans and sorghum, especially in fields lacking seed treatments. Fortunately, overall, foliar diseases have remained low due to the high temperatures, a relief for farmers.Management Strategies for Crop HealthImplementations such as crop rotation, effective seed treatments, and diligent disease monitoring are essential for managing crop health. These strategies can significantly mitigate risks associated with disease pressures.Importance of MonitoringFarmers should closely monitor their crops for signs of disease, particularly in soybeans and sorghum. Early detection is crucial for effective management and can prevent more significant outbreaks.Actionable Advice for FarmersTo enhance crop health and manage disease risks, consider the following:Utilize effective seed treatments to reduce early-season disease risks.Implement crop rotation strategies to manage soil-borne pathogens effectively.Maintain vigilant monitoring of crops for any signs of disease development.Time Stamps(00:00) - Introduction to episode 312 of the Red Dirt Agronomy podcast with host Dave Deken.(00:36) - Introduction of the dream team, featuring Dr. Brian Arnall and Dr. Josh Lofton.(01:15) - Dr. Josh Lofton provides a crop update, discussing the hot summer and rainfall impacts on crops.(02:10) - Josh shares insights on the rapid growth of sorghum and the challenges posed by pests.(03:05) - Discussion on replant decisions due to favorable conditions for July crops.(04:26) - Josh talks about the implications of summer crop decisions on future wheat planting.(05:01) - Amanda shares information on short-season wheat options for growers.(05:37) - Josh discusses the unusual summer weather and its effects on disease pressure in crops.(06:04) - Introduction of Dr. Maíra Duffeck, the new row crop pathologist, to discuss disease pressure.(06:33) - Dr. Duffeck describes the early season conditions and their impact on disease development.(07:27) - Discussion on seedling problems in sorghum and soybean due to pathogens.(08:22) - Dr. Duffeck explains the effects of fusarium on sorghum and soybean seedlings.(09:02) - Dr. Duffeck shares observations on the health of corn fields and the lack of foliar diseases.(09:37) - Josh raises questions about the timing of preventative measures for soybean crops.(10:41) - Dr. Duffeck discusses the challenges of diagnosing seedling diseases in soybean and corn.(12:08) - The conversation shifts to the impact of environmental conditions on seedling diseases.(13:11) - Discussion on the management of charcoal rot in sorghum and soybean crops.(14:14) - Dr. Duffeck explains the symptoms and impacts of charcoal rot on soybean plants.(15:01) - The group discusses aflatoxin concerns and the conditions that favor its development.(21:03) - Dr. Duffeck shares insights on scouting for ear rot problems in fields.(22:15) - Discussion on the testing of silage corn for aflatoxin and its implications for dairy systems.(25:41) - The conversation explores the complexities of mycotoxin production in crops.(29:58) - Dr. Duffeck discusses the absence of foliar diseases in soybean fields this season.(31:12) - The group reflects on the early stages of crop development and disease pressure.(33:03) - Dr. Duffeck explains sudden death syndrome (SDS) in soybean and its management strategies.(36:15) - Discussion on the evolution of management strategies for SDS in soybean crops.(38:31) - Dr. Duffeck shares her background and journey from Brazil to Oklahoma State University.(44:19) - Closing remarks and thanks to Dr. Duffeck for joining the podcast.(45:12) - Dave Deken wraps up the episode and encourages listeners to visit the website for more information. RedDirtAgronomy.com