A soil fungicide is a chemical used to kill harmful pathogens in the soil.
A soil fungicide has long been widely used in agriculture, but because they are chemical substances, they can be harmful to the human body if used incorrectly, and their odor can cause problems in the neighboring environment. Moreover, residues in the soil can cause chemical damage, so it is important to use them in accordance with the method and amount used.
Uses of soil fungicides include avoidance of crop failure, reduction of soil diseases, and control of soil pests. These phenomena are closely related to each other.
Consecutive cropping is a disorder that occurs when the same crop is grown continuously in the same field, resulting in an imbalance of soil components and the development of pests and diseases. Soil sterilization can eliminate or prevent these vicious cycles.
In addition, flooding caused by torrential rains can lead to outbreaks of disease-causing bacteria, etc. In such cases, soil fungicides are also used.
Considering the time and labor required for sterilization using sunlight and insecticidal plants, soil fungicides can be effective more quickly and accurately when used properly according to the directions for use.
Because it is a chemical method of sterilization, if used incorrectly, it can be harmful not only to the soil but also to the human body. Another disadvantage is that the easier it is to use, the more expensive the chemical becomes.
The type of soil fungicides used depends on the pests and diseases that occur, the time of year, and the conditions of the field. Since the effectiveness varies depending on the active ingredient, it is important to select the right one for the right time of year and application.
The names of the agents include chloropicrin and dojopicrin. It can be used on a wide range of crops and is effective against a wide variety of fungi, bacteria, pests, centipedes, and weeds. It is a soil injection type chemical and should be covered with a film or other covering, as it tends to vaporize easily. It is less effective when the soil temperature is low (below 10℃).
D-D and Teron are the names of the chemicals. It is mainly effective against insect pests and centipedes. It is a soil injection type agent and is treated in the same way as chloropicrin.
Soil Lean and Double Stopper are examples of agents that combine chloropicrin and D-D. The combination of chloropicrin and D-D provides the advantages of both agents. By combining the advantages of the two, it has a wide range of effects on fungi, bacteria, pests, centipedes, and weeds.
It is particularly effective in killing centipedes. The advantage of this product is that it has a less irritating odor than chloropicrin and is easy to use, even in greenhouses. The treatment method is soil injection.
Gastard fine granules is an example. They are effective against fungi, bacteria, and weeds, but slightly less effective against pests and insect pests. The treatment method is soil admixture.
After mixing, gasification occurs, so film covering or watering is recommended to suppress gas production. Care should be taken to maintain soil temperature (10-15℃). The fine granules are easy to spread by hand or with a sprayer, and the spraying condition can be visually observed.
It is effective against fungi, bacteria, and weeds, and is somewhat less effective against pests and centipedes. It is mainly a liquid type sprayed on the soil surface, and can be easily applied with a jar or special sprayer attached to a tractor, making it easier to handle than soil injection.
This is a mixture of methyl isothiocyanate oil and D-D agents and has a wide range of effects on fungi, bacteria, pests, centipedes, and weeds. It has a relatively low pungent odor and is easy to handle. The main treatment method is soil injection, and it can be used efficiently with soil disinfection equipment.
In order for soil fungicides to be effective, it is necessary to remove as much of the damaged residue as possible from the field as a preliminary step. Remove mud from tractors, rotaries, and other equipment used for the operation to prevent contamination of undisturbed soil.
Treatment methods differ depending on the chemical. In the case of soil injection type, the chemical is injected into the soil with a manual injector or machine. In the case of surface spraying, it is applied to the surface with a spreader. When diluting, follow the instructions for use listed on the label.
If gas is generated violently upon contact with the soil, plow the soil immediately with a tractor, etc., and if necessary, cover with a film. After a fumigation period of approximately 7 to 14 days, followed by a degassing period of approximately 3 to 14 days, the seedlings can be planted.
There are machines that spray chemicals and cover with film at the same time, or special sprayers that can be attached to a tractor, making them more efficient.
*Including some distributors, etc.
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