Soybean Weed Control
Part 2, Section 4: Soybean Pest Management
Soybean Pest Management
Tables 2.4-1 through 2.4-16 list herbicide treatments labeled for use in soybean at the time this guide was printed. Herbicide labels change continually. Always read the label of the specific product to determine current registered uses. For additional information online about weed management, please visit our Web site at weeds.cas.psu.edu.
When selecting a herbicide program for soybean, consider the following factors: tillage, soil type, weeds present in field, management practices, and rotation plans. No one herbicide program is best for all situations. In addition, continued reliance on a single program can lead to severe problems. The development of triazine-resistant weeds across the state is an example.
Tillage can be an important component of a weed management system. Primary tillage can help reduce the rate at which certain perennials, such as hemp dogbane, spread. Row cultivation also can be used to help control weeds and reduce herbicide dependency. Crop residue left on the soil surface in no-till and reduced tillage may interfere with the activity of preemergence herbicides, resulting in a need for increased quantities of these herbicides.
The herbicide effectiveness ratings listed here may be used as a guideline for comparing herbicides. Results obtained by individual farmers depend on environmental conditions, rates used, application techniques, and severity of weed pressure. The rates listed in Tables 2.4-7, 2.4-10, and 2.4-12 encompass the entire range of rates listed on the label. Refer to the product label to determine the appropriate rate for soils and weeds found in a specific field. Exceeding labeled rates may cause crop injury or illegal herbicide residues in the crop.
- Table 2.4-1. Soybean herbicides and their restrictions.
- Table 2.4-1a. Selected glyphosate and glyphosate-type products and premixes for agronomic use.
- Table 2.4-2. Future products for soybean.
- Table 2.4-3. Soybean herbicide prepackaged mixes or co-packs, and equivalents.
- Table 2.4-4. Characteristics of preplant or preemergence soybean herbicides.
- Table 2.4-5. Characteristics of “burndown” and postemergence soybean herbicides.
- Table 2.4-6. Relative effectiveness of “burndown” herbicides for no-till soybean.
- Table 2.4-7. Characteristics of “burndown” herbicides for no-till soybean.
- Table 2.4-8. Relative effectiveness of herbicides on individual weeds.
- Table 2.4-9. Effectiveness of different foliar-applied herbicides on perennial broadleaf weeds in soybean (based on seasonal control).
- Table2.4-10. Preplant, preplant-incorporated, and preemergence herbicides for soybean.
- Table 2.4-11. Soybean herbicide preplant or preemergence rates per acre based on soil texture and organic matter.
- Table2.4-12. Postemergence herbicides for soybean.
- Table 2.4-13. Weed sizes for postemergence soybean herbicides.
- Table 2.4-14. Spray additives and rainfastness for “burndown” or postemergence soybean herbicides.
- Table 2.4-15. Soybean herbicide rotational restrictions.
- Table 2.4-16. Feeding restrictions on soybean forage or grain after treatment with various herbicides.
- Table 2.4-17. Summary of recommended insecticides for soybean insect control.
- Table 2.4-18. Suggested insecticides, rates, and restrictions for soybean insect control.