In agriculture, pesticides and herbicides not only help farmers to increase crop yields but also control pests and weeds effectively. However, there are various pesticides and herbicides with different ingredients in the market. This article will explore this issue in detail, revealing the necessity of pesticides with different ingredients and their specific applications.
Differences in targets
Different pests and weed species have different sensitivities to agents. For example, glyphosate is effective against a wide range of weeds, while nicosulfuron is mainly used to control grass weeds. This variability makes it important for farmers to choose the right agent for the situation in order to achieve the best results.
Multiple modes of action
Insecticides act through stomach poisoning, poisoning by touch, fumigation, endosorption, etc. Herbicides work by interfering with the balance of plant hormones, destroying photosynthesis, and other different principles. For example, gastric insecticides need to be ingested by the pests, while touch insecticides only need to come into contact with the pests to be effective.
Safety
Safety is an important consideration when selecting insecticides and herbicides. Some ingredients are relatively safe and less harmful to the environment and non-target organisms, while others may be more toxic, but their insecticidal or herbicidal effects are more effective in specific situations. Therefore, farmers need to make choices based on use scenarios and safety requirements.
Resistance
Long-term use of single-ingredient insecticides or herbicides may lead to the development of resistance in pests or weeds. In order to delay the development of resistance, rotating or mixing the use of different ingredients is an effective method. This not only improves control, but also extends the service life of the chemicals.
Crop characteristics
Crops vary in their tolerance to chemicals. Some herbicide ingredients may be safe for some crops and harmful to others. For example, certain ingredients are safe for wheat but may be toxic to corn. Therefore, it is especially important to select the right herbicide ingredient for a particular crop.
Environmental conditions of use
Environmental factors such as temperature, humidity, and soil texture can affect the effectiveness of an agent and the development of pests. Certain ingredients may be better suited to specific environmental conditions. For example, certain insecticides may be less effective in hot conditions, while certain herbicides may be more effective in higher humidity environments.
Residual Period Requirements
In some cases, it may be necessary to select ingredients with a short residual period to minimize impact on subsequent crops, while in other cases, ingredients with a long residual period may be better suited to control long-term weed problems. For example, the use of herbicides with long residual periods in orchards may reduce weed regrowth, thereby reducing labor costs.
Common Pesticide Ingredients
Organochlorines
Organochlorine insecticides are pesticides with a long history of efficiency and broad spectrum. However, due to their long-term residual nature in the environment and toxicity to non-target organisms, their use has now been greatly reduced.
Organophosphates
Organophosphorus insecticides are a widely used class of insecticides with high toxicity and good insecticidal effects. However, these agents are highly toxic to humans and animals, and require special attention to safety protection when used.
Carbamates
Carbamate insecticides are highly effective and fast, and are effective against a wide range of pests. Their relatively low toxicity and low environmental impact make them a more desirable choice.
Pyrethroids
Pyrethroid insecticides are extracted and synthesized from natural pyrethroids and are characterized by high efficiency, low toxicity and broad spectrum. These insecticides are environmentally friendly and have a low impact on non-target organisms.
Common Herbicide Ingredients
Phenoxycarboxylic acid
Phenoxycarboxylic acid herbicides are mainly used for the prevention and control of broadleaf weeds, with better selectivity and lower toxicity, they are one of the common herbicide ingredients.
Benzoic acid
Benzoic acid herbicides achieve herbicidal effect by interfering with the balance of plant hormones, and are mainly used for the prevention and control of grass weeds. They have good selectivity and are safe for crops.
Diphenyl ether
Diphenyl ether herbicides mainly kill weeds by inhibiting photosynthesis and have strong weed control effects, but they may be toxic to certain crops and need to be used with caution.
Triazobenzene
Triazobenzene herbicides kill weeds by interfering with photosynthesis and growth hormones of plants, and are widely used for weed control in a variety of crops.
Precautions for use
When using insecticides or herbicides, it is necessary to strictlyfollow the product instructions and relevant regulations to ensure that the control purpose is achieved in a safe and effective manner, and to minimize the adverse effects on the environment and other organisms.
Environmental impacts
The rational use of insecticides and herbicides can not only improve the control effect, but also minimize the negative impact on the environment. The balance of the ecosystem can be protected and the harm to non-target organisms can be minimized through scientific methods of use.
Reasonable rotation of use
In order to prevent the emergence and development of resistance, it is recommended to reasonably rotate the use of agents with different compositions. This will not only prolong the service life of the chemicals, but also improve the control effect and ensure the sustainable development of agricultural production.
Professional advice
If you have any questions about the composition or use of specific chemicals, it is recommended to consult professional agricultural technicians. They can provide scientific advice on a case-by-case basis to help farmers make the best choice.
Conclusion
In summary, insecticides and herbicides with different compositions are designed to meet different needs and respond to different situations. Proper selection and use of these agents not only improves control, but also protects the environment and promotes sustainable agriculture.
Frequently Asked Questions
1. How to choose a suitable insecticide or herbicide?
Selection of suitable agents is based on pest or weed species, crop characteristics and environmental conditions, while considering safety and resistance management.
2. How to solve the problem of insecticide or herbicide resistance?
By rotating the use of agents with different compositions, the emergence of resistance can be effectively delayed and the control effect can be improved.
3. What is the impact of insecticides and herbicides on the environment?
Reasonable use can minimize negative impacts on the environment, but misuse may cause pollution and harm to non-target organisms.
4. How can crops be protected from chemicals?
Choose ingredients that are safe for crops and follow directions closely to avoid overdosing.
5. How can the frequency of use of insecticides or herbicides be controlled?
The frequency of use should be reasonably controlled according to the specific situation and control needs, and avoid over-reliance on a single agent.
Post time: Jul-08-2024
