Big weeds, waiting to spray means more yield loss
The point of this data is simple; it illustrates that in many Missouri soybean fields we are losing yield as a result of early-season weed competition and waiting too long to make our post-emergence herbicide applications. One of the fundamental principles of weed science is that the more weeds there are and the bigger these weeds get, the more yield loss we will experience. To some extent, this principle is also illustrated in the results from last year's survey contained in Figure 1. Although this figure does not show the weed density at each location, it does show the time that the post-emergence herbicide applications were made. For the most part, herbicide applications made to soybeans in the later stages of growth resulted in higher yield loss than those made at earlier stages of growth.
So, as you consider the timing of your post-emergence herbicide application in soybean this season, consider the price of a bushel of soybeans and what a 2 or even 3 Bu/Acre yield loss means to you. There are plenty of companies promoting various practices that will "enhance" yield by 2 or 3 Bu/Acre; our data indicate that in many Missouri soybean fields, we may be losing this much yield to weed competition.
No matching related articles at this time.
- Report finds ag employers can’t fill STEM jobs
- Free webinar for ag retailers on strip tillage
- White House agenda on climate change impacts to natural resources
- Improved harvest weather is weighing on the crop markets Monday
- NGFA reiterates need for STB to change rail fuel surcharge rule
- 2014 World Food Prize awarded to Dr. Sanjaya Rajaram
- East-West Seed signs marketing collaboration with Monsanto
- How much corn can the ethanol industry use?
- USDA releases 2012 cash rents data report
- Commentary: Government wants farmers to quit farming
- Economist: Taxing P could reduce risk of algal blooms
- Resistant weeds not controlled by fall residuals