Fieldwork has progressed slowly in the past week due to cool air and soil temperatures.
7 articles tagged "April 2023".
![thumbnail image](https://extension.entm.purdue.edu/newsletters/pestandcrop/wp-content/uploads/sites/2/2023/04/Fig1_Marcelo.png)
Every spring we receive several calls and e-mails about a certain 3-foot tall weed with yellow flowers (Figure 1).
![thumbnail image](https://extension.entm.purdue.edu/newsletters/pestandcrop/wp-content/uploads/sites/2/2023/04/Figure-1-Hemlock-article.jpg)
The presence of poison hemlock (Conium maculatum L.) in pastures, fencelines, and field edges (Figure 1) is a frequent concern in many parts of Indiana during the Spring.
![thumbnail image](https://extension.entm.purdue.edu/newsletters/pestandcrop/wp-content/uploads/sites/2/2023/04/Figure-1-Air-Temps-article.jpg)
In the Spring, growers may experience challenges when controlling winter annuals weeds or terminating cover crops with glyphosate-based burndown herbicide programs, specifically when glyphosate is sprayed in cool, cloudy weather conditions or tank mixed with residual herbicides, ATS, or synthetic auxins (issue mostly for grasses).
![thumbnail image](https://extension.entm.purdue.edu/newsletters/pestandcrop/wp-content/uploads/sites/2/2023/04/Figure1_Final.png)
Through the first 18 days of April, temperatures ran 5.5◦F above normal statewide (Figure 1).
![thumbnail image](https://extension.entm.purdue.edu/newsletters/pestandcrop/wp-content/uploads/sites/2/2023/04/gddContourMap_April-1-to-19.png)
Many factors (many of them unpredictable) determine an insect outbreak.
![thumbnail image](https://extension.entm.purdue.edu/newsletters/pestandcrop/wp-content/uploads/sites/2/2023/04/Figure1-1.png)
Much like March, April has gotten off to a warm start.