Red Dragon® Row Crop Flamers

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Row Crop Flaming Kills Weeds, Grasses, Destroys Insect habitats, without pesticides, and is up to 50% more cost-effective than other methods!

Flaming Can Be Used For Different Applications:
Red Dragon® Row Crop Flamers offer producers many options for weed control while reducing or eliminating herbicide usage. Flamers burn clean, efficient, and affordable propane so there is no residue or run-off to worry about. Flaming can be done pre-emerg and post-emergence and has been proven effective on a wide variety of crops including corn, milo, sorghum, soybeans, cotton, carrots, lettuce, and many more. For more detailed information about row crop flaming and its applications see our Ag Flaming Guide or our Row Crop FAQ Page.

Flame Engineering Manufactures Flame Cultivation Equipment To Fit Your Needs:
Flame Engineering manufactures complete Row Crop Flaming Units and two styles of Row Crop Flaming Kits which can be used with your own toolbar or cultivator. Units are available in 2, 4, 6 & 8 row configurations and Kits are available in 2, 4, 6, 8, 12 & 16 row configurations.

Red Dragon® Flamers: Effective, Economical, and Pesticide Free!


  • Complete roll cage protection for the tank and control heads
  • Tank strap with valve guard assembly
  • Category 2-3 point hitch
  • Toolbar complete with mounting brackets
  • Hydraulic folding toolbar (included on 6 and 8-row units)
  • Complete manifold assemblies with electronic solenoids
  • Cab control box with a master shut-off switch
  • Toolbar leg assemblies for consistent burner height
  • all burners required for your configuration
  • All necessary hoses cut to length with brass fittings
  • Fuel strainer
  • 250-gallon liquid withdrawal propane tank (shipped empty)
  • Red Dragon® vapor torch kit for lighting burners
2-RU 2 row-unit 4-RU 4 row-unit 6-RU 6 row-unit 8-RU 8 row-unit


3 Burner Models To Choose From Based on Row Spacing:

LT 1 1/2 x 8 D

This is our standard Row Crop Burner. It projects a sweeping flame up to 10" wide and 33" long.

LT 2 x 8

This optional Row Crop Burner projects a sweeping flame up to 18" wide and 36" long.



  • Complete manifold assemblies with electronic solenoids.
  • Cab control box with master shut-off switch
  • Toolbar leg assemblies for Skid Style
  • All burners required for your configuration
  • All necessary hoses cut to length with brass fittings.
  • Fuel Strainer
  • Custom Mounting Brackets for the Toolbar legs
  • Valve Protector
  • Red Dragon® Vapor Torch Kit for lighting torches



RKS Skid Leg Kit
(Model 4-RKS Four Row Kit Shown)


RKS Skid Style kits feature the same toolbar legs as our complete units and allow the torches to remain at a consistent height while flaming. If you purchase a kit, you will be responsible for devising your own safe tank mounting system, roll cage, and control protection. Kits include everything else you need to connect to your tank including custom mounting brackets for the toolbar legs - just give us the dimensions of your toolbar.


3 Burner Models To Choose From Based on Row Spacing:

LT 1 1/2 x 8 D

This is our standard Row Crop Burner. It projects a sweeping flame up to 10" wide and 33" long.

LT 2 x 8

This optional Row Crop Burner projects a sweeping flame up to 18" wide and 36" long.


  Model Numbers:
2 Row Skid Leg Kit
4 Row Skid Leg Kit
6 Row Skid Leg Kit
8 Row Skid Leg Kit
12 Row Skid Leg Kit
12 RKS
16 Row Skid Leg Kit
16 RKS
My wife and I have a 15-acre farm in Phoenix Arizona where we grow vegetables using organic methods. In growing organically we are very limited when it comes to weed control (we seem to grow more weeds than vegetables). I watched your videos on Row Crop equipment and was sold on the idea. Your staff was extremely helpful. I must admit I was terrified at the thought of aiming a torch at the base of my sweet corn even though I had seen it done in the videos. I think the hardest thing I have ever done was letting my foot off the clutch the first time I drove through my corn with my 2-Row Burner. But guess what?... The corn survived just fine and the weeds did not!
Bob Berglund - Grandma’s Farm  


See a row crop in action!

Video 1

Video 2

Always consult your propane dealer about purchasing the proper tank or have them check your existing tank to make sure it is clean and safe before you begin flaming. You MUST use a propane tank equipped with a Liquid Withdrawal Valve. Do NOT use a bottom withdrawal valve as any possible debris or scale may plug torches or solenoids down the line. We recommend a top-mounted, liquid withdrawal valve with a dip tube which reaches close to, but does not rest on the bottom of the tank. Clean fuel and tank are critical for optimum performance of all flaming equipment. Please check with us before selecting your propane tank.

In 1938 an Alabama farmer had an idea. Price McLemore discovered that the flame from a kerosene burner would destroy the weeds in his cotton and corn. A machine was assembled and several acres of his corn and cotton were flamed cultivated. This first known attempt at flame cultivation from a tractor-mounted unit consisted of two kerosene burners per row on a two-row unit. The fuel tank was pressurized with a bicycle pump, which would supply the necessary fuel to the four burners. This must have been quite a site to neighboring farmers as he drove the tractor with one hand and pumped like crazy with the other hand. It was crude but effective.

For several years he attempted to arouse interest in his process by presenting it to agricultural research institutions and experiment stations. Most of his efforts were met with disbelief and laughter. Finally, in 1942 Louisiana State University began experimenting with flame weeding in sugar cane under the direction of Dr. H. T. Barr. The Delta Branch Experiment Station included flame cultivation in their 1943 cotton weed control project, and in 1944 they began work with corn and soybeans. Results of these experiments were very promising, especially in cotton, and generated a great deal of interest among farmers in Louisiana, Mississippi, and Arkansas. It is estimated that by 1946 there were at least 1,000 flame cultivators in the cotton fields of the Mississippi Delta.

Soon after, the International Harvester Company began researching flame cultivation and developed a cast iron burner. It produced a relatively flat, fan-shaped flame which improved the coverage area as the unit moved through the field. However, this project was abandoned due to a corporate decision.

One of the next developments in row crop cultivation was the addition of another burner, sometimes under a hood, to control the weeds and grass between the rows. This was not universally accepted, according to J. W. Gotcher Sr., President of Gotcher Engineering and Manufacturing Co., an early manufacturer of flaming equipment. "Most growers thought it was necessary to stir the soil at regular intervals throughout most of the growing season for maximum plant growth and production" according to Gotcher. The third burner technique became popular when frequent rains caused the fields to be too wet to cultivate in the conventional manner.

It is estimated that by 1960 there were 15,000 flaming units in the fields, most of which were being used in cotton with some used in corn and soybeans. About this same time interest was growing in non-selective flaming of mint and alfalfa.

In the years that followed, research proved that flame cultivation, can be used on 30 to 40 different crops with good results. Although the majority of the research has been done with corn, cotton, and soybeans, many other crops such as milo, garlic, blueberries, strawberries, radish, lettuce, potatoes, asparagus, grapes, fruit trees, and the Australian tea tree all have been successfully flame cultivated.

The objective of row crop flaming is not to "burn the weeds to a crisp" but to expose the weed to enough heat to vaporize the water in the plant cells. This will destroy the plants ability to move moisture and carry on photosynthesis and in a short time will cause the plant to wither and die. The time that the flame must be in contact with the weed will vary with the type and size, but in most cases 1/10 of a second is enough exposure. Small, tender plants are more susceptible to heat than more mature growth, therefore the crop needs to be larger than the weeds or grass to be controlled. Some plants by nature are more resistant than others to the 2000° F. blast of heat from the torch. The best way to tell if you have sufficiently exposed the weed is to perform "The Fingerprint Test". To perform this test, squeeze the leaf between your thumb and finger. If you leave your "fingerprint" the weed has been exposed to enough heat to kill it. When preparing to flame, the speed, torch angle, fuel pressure, and other variables need to be considered.

Proper burner setting is necessary for weed control and to prevent damage to the crop. In some cases the crop will be stressed, however it will recover in a very short period of time. Normally the burners are set at an angle of 30-60° from horizontal (See figure 1), 4-10 inches from the crop and a pressure of 25-70 PSIG. Tractor speed will vary from 2.5 to 5 mph. Generally, torches are staggered when moving through the row so as not to collide with the flame from the opposite burner (See figure 1). By directing flame into the crop row from both sides, more complete coverage and faster ground speeds are possible.

A different application would be pre-emerge flaming, sometimes called seedbed sterilization. This is generally performed before the crop is planted to remove any weeds in the seedbed and to give the crop a viable start. A variation to this technique is to flame 3-4 days after planting, just before crop emergence, to give the crop a good weed free start.

Flame Engineering Inc. manufactures complete units and kits, which mount to the producer's toolbar. Our complete unit comes with skid style legs, tank cradle, and protection cage. When ordering a kit, the producer has the option of either skid style legs, like the complete unit, or drop down legs suspended from the toolbar. The kits do not include tank cradle or roll over protection.

Figure One

The flaming of corn, popcorn, field corn, or sweet corn, can be done before planting and again at an early vegetative state. Typically corn can be flamed when it reaches a height of 4 inches and can be flamed until the corn reaches canopy. Tractor speed should remain in the 3-5 mph range. Other work has been done on "flaming off" of corn. This approach is when the weeds are the same height of the corn and the whole field is flamed off. Corn can withstand one "flaming off" with only a 4.5% of plants eliminated (Parks 13). "Flaming off" can be a viable option if a producer is about to lose his corn crop to weeds. Smith offers these three recommendations for flame cultivation of corn.

1. Prepare the seedbed and plant so that the row band (5-6 inches on each side of the planter) is relatively smooth and flat. Then the flame can get to the weeds and will not be deflected into the crop.

2. Flame cultivate when the weed growth indicates a need for cultivation. This should be done while the weeds are small and tender (less than 2 inches tall). Corn can be flamed before it is two inches tall, if cultivation is needed. To prevent injury to the crop when corn is flamed at this early stage, do not flame again until the corn reaches a height of 6-8 inches.

3. Do not move soil into the flame-treated row band when cultivating. This soil is a source of new weed seeds. (7) Seed corn companies have also found a specialized use for flaming. In the production of seed corn, they look for ways to extend the length of time that the male corn plants produce pollen to pollinate the female corn plants. The burners are set to direct the flame at the head of the male corn plant. This causes maturity differences between the plants and different plants create pollen at different times. This is accomplished through either a timer switch or a manual switch which allows intermittent flaming of the corn heads.

Flaming soybeans is slightly more dependent upon critical timing. Typically you flame 3 times, once before planting, when the plant emerges and a third time with plant tall enough to flame under leave canopy. With soybeans, staggered cross flaming is the standard burner pattern with ground speed ranging from 3-5 mph. When flaming soybeans, the burners must be set properly so as to direct flame at the base of the plant and try and also keeping heat off the leaves. The following are recommendations for the flaming of soybeans.

1. Flame seed bed before planting.

2. Prepare the seedbed and plant so that the row band (5-6 inches on each side of the planter) is relatively smooth and flat. Then the flame can reach the weeds and not be deflected into the crop.

3. The first flame cultivation should not be applied until the soybeans are 10-12 inches tall. Succeeding flame treatments should be dictated by the weed growth.

Grain Sorghum
Flaming of grain sorghum usually begins once it reaches a height of approximately 8 inches. Staggered cross flaming is the recommended method of flaming with ground speed ranging from 3-5 mph. According to Parks, if the weeds and the grain sorghum emerge at the same time one "flaming off" application can be performed before the terminal bud comes through the soil surface. Normally, the grain sorghum plant is 3-4 inches in height when the growing point (terminal bud) reaches the soil surface (10).

Flame cultivation of cotton can begin once it reaches a height of 4-8 inches. It works best with staggered cross flaming. Tractor speed is in the 3-5 mph range. Typically, for best control of perennials in cotton a second application of flame cultivation should occur 2-3 days after the first flaming. According to Byrd, "some of the advantages to flame cultivation in cotton include: spectrum weed control, repeat treatment as often as desired, low cost, no residue, no activation required, can flame when too wet to cultivate, controls large, annual morning glory species, provides immediate results, and weed response is independent of environmental stress." (1)

Flame cultivation is performed on potatoes for control of the Colorado potato beetle (CPB). According to Moyer, these burners were directed towards the row at 45° from horizontal of the boom and tilted downward at a 45° angle. The flamer was operated at speeds from 3, 4, 5 and 6 mph (6). Moyer also stated that "the flaming technique provided 70-80% control of overwintering adult CPB. It was also determined that flaming reduced egg hatch by 35%, lowering the number of first generation CPB larvae (6)."

Another use for flaming in potato fields is potato vine desiccation before harvest. Vine desiccation is accomplished by using Red Dragon® Liquid Spray Torches. Speeds traveled when desiccating vines will range from 2-4 mph depending on pressure settings and vine density.

It has been proven that tomato plants have the ability to withstand flaming. Chappell has shown that eight week old transplanted tomato plants can be safely flamed with excellent weed control and very little stress to the tomato plants. (56) The burner setting was staggered cross flaming and tractor speed was 3-4 mph.

Cole Crops
The flaming of cole crops, such as broccoli, cabbage, brussel sprouts, and cauliflower, has been shown to control weeds. Staggered cross flaming provides the best results with tractor speeds being around 2 mph (Wilson 21). Cabbage and brussel sprouts can be flamed approximately 3 weeks after the plants are transplanted, whereas broccoli and cauliflower can be flamed around two weeks after transplanting. No decreased yields are seen with one flame application, and if a second application is needed it should be done at higher tractor speeds to decrease crop injury.

Byrd and Snipes, C. E. Flame Cultivation in Cotton. 1996. (August 8th, 1999).

Chappell, W. E. "Flaming of Corn, Soybeans, and Vegetable Crops" Fifth Annual Symposium on Thermal Agriculture (1968) 55-56.

Moyer, Dale D. Development of a Propane Flamer for Colorado Potato Beetle Control. Cornell Cooperative Extension. 1991.

Parks, Jack H. "Progress of Flame Cultivation in the Texas High Plains and Rio Grande Valley." Proceedings of First Annual Flame Symposium. (1964) 8-17.

Smith, Bryant, and Hall, M. Flame Cultivation to Control Weeds. University of Kentucky Cooperative Extension Service. Bulletin 269. Undated.

Wilson and Ilnicki, R. D. "Control of Annual Weeds in Cole Crops." Proceedings of Third Annual Symposium. (1966) 18-21.



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