For organic farmers, weed control can be one of the biggest challenges of the growing season. Without conventional herbicides, growers often rely on cultivation and other mechanical methods to keep weeds from competing with the crop. A row crop flamer, also commonly called a propane weed burner, provides another tool for controlling weeds without herbicides.
Row crop flamers use controlled propane heat to quickly damage the cells of young weeds, causing them to wilt and die. Rather than burning weeds to the ground, the goal is to expose them to intense heat for a short period of time. When properly timed and operated, flame weeding can control weeds within the crop row—an area that can be difficult to reach with conventional cultivation equipment.
For organic growers, flame weeding can be especially valuable as part of a broader weed-management program. It gives farmers another way to manage troublesome weeds while reducing reliance on hand labor and maintaining an herbicide-free production system.
What is Row Crop Flamer aka Weed Burner?
Row Crop Flamers provide producers with a variety of weed management alternatives, thus lowering or eradicating the use of herbicides. Weed Burner burns propane in a clean, practical, and cost-effective manner, leaving no residue or run-off. Flaming can be done both before and after emergence on a wide range of crops, including corn, millet, soybean, milo, cotton, carrots, lettuce, and many others.
Decoding Flaming Mechanism
A well-directed natural gas or liquid propane (LP) flame elevates the temperature inside the weed, driving cells to rupture and effectively removing weeds with minimal crop damage. Flaming produces heat, which reduces weed growth, so it is advisable to exercise the practice when the plants are dry, and the wind is blowing in the conducive direction. Moisture and wind can lower the amount of heat created by the flame, limiting the efficiency of the flaming application.
Using Row Crop Flamer | Benefits for organic farmers
A skillfully focused flame powered by natural gas or liquid propane (LP) raises the temperature inside the weed, forcing cells to break and effectively eradicating weeds while inflicting minimal crop harm. Flaming slows weed growth by generating heat; therefore, it’s best to do it when the plants are dry, and the wind is blowing in the right direction. Moisture and wind can reduce the heat produced by the flame, limiting the flaming application’s effectiveness.
When weeds are 1 – 2 inches high or in the three – five-leaf cycle, they are most vulnerable to flame heat. Flaming is more likely to impact broadleaf weeds than grasses like a foxtail.
Some farmers have discovered that burning is more effective at controlling certain weeds (such as lambsquarters and pigweed) than others (such as mustards or common ragweed). Also, the process is found to be extremely successful in crops where the growth point is underneath the soil surface.
Although this may vary depending on the weed kind and size, exposing a weed seedling to flame for 1/10 of a second is usually adequate to achieve the desired outcome. Heat affects smaller, more delicate plants more than larger, more mature plants. When the crop plants grow taller than the weeds, the Row Crop Flamer offers the best control. Weed leaves appear dull after an efficient flame application, and it is easy to press a visible fingerprint onto the leaf surface.
Final Words
Flame weeding offers several advantages over mechanical weed control methods such as rotary hoeing. A rotary hoe works by disturbing the soil to uproot or bury small weeds, so its effectiveness can depend heavily on soil type, soil condition, and weed growth stage. Wet, crusted, or heavy soils can make timely and effective rotary hoeing more difficult.
A row crop flamer controls weeds without disturbing the soil. Instead, propane heat damages the weed’s plant cells, causing susceptible weeds to wilt and die. Because the flamer doesn’t need to penetrate or move soil, it can be used across a wider range of soil types and conditions. It also avoids disturbing crop roots or soil structure, making flame weeding a valuable option for controlling weeds within the crop row.
