Farmers play a crucial role in managing crop production pests, and their valuable feedback provides insights into integrated pest management (IPM) practices and challenges. The results of a recent survey conducted during Private Pesticide Applicator Recertification workshops shed light on key aspects of pest management decisions for the current growing season.
Weed management remains a major concern, with the majority of farmers reporting the presence of herbicide-resistant weeds. Notably, glyphosate resistance was widespread, affecting 67% of respondents, while resistance to ALS-inhibitors was observed in 15% of cases. It is crucial to acknowledge that the extent of herbicide resistance may be more widespread than perceived, necessitating vigilance and exploring diverse control strategies.
Farmers showed a willingness to adopt non-chemical weed control methods. Approximately 50% of respondents emphasized rotating herbicide-resistant traits, while altering crop rotation, hand-pulling weeds, and utilizing mechanical weed control methods were also commonly employed strategies.
Regarding soybean aphid management, survey responses revealed varying opinions on the economic threshold (ET) of 250 aphids per plant as a trigger for insecticide applications. While 45% of farmers followed the ET, 32% believed it was set too high, prompting earlier spraying. It is essential to note that research supports the ET, providing a buffer period before aphid populations reach damaging levels. Early applications not only risk harming beneficial insects but also contribute to the development of insecticide resistance.
The survey also touched upon the use of foliar fungicides in corn and soybean crops. While a majority of farmers did not use fungicides, those who did reported mixed results in terms of yield response. Notably, the prevalence of foliar diseases in corn and soybeans in Minnesota typically does not warrant widespread fungicide applications. Regular scouting and monitoring throughout the season remain critical for timely and effective pest management decisions.
The survey findings underscore the importance of integrated pest management practices. Farmers are encouraged to follow IPM guidelines, including proper pest identification, utilization of multiple control strategies, adherence to economic thresholds, and pesticide application in accordance with label instructions.
Diversifying modes and sites of action, as well as consulting University of Minnesota Extension resources, can further enhance pest management efforts. By embracing IPM principles, farmers can safeguard the long-term efficacy of pesticides, minimize environmental impacts, and optimize their agricultural outcomes.
Photo Credit: GettyImages - Zoran Zeremski
Categories: Minnesota, Business, Crops, Corn, Soybeans