Insecticide double, also known as insecticidal dian, is a type of organic pesticide and a synthetic analog of natural silkworm toxins, making it a biomimetic insecticide. The pure form of the compound is a white solid that contains crystalline water, while industrial products typically appear as brown or reddish-brown liquid or loose cylindrical particles. This insecticide has strong contact and stomach action, along with some fumigant properties. It acts as a neurotoxin, causing symptoms like excessive salivation and paralysis in pests. According to the China Pesticide Network, it has strong systemic activity within plants, making it effective for protecting crops from various pests.
It is commonly used to control pests in rice fields, fruit trees, and vegetable crops. For example:
1. In rice fields, it effectively controls pests such as the rice leaf roller, planthopper, and locust. A typical application involves mixing 200 ml of the product with 50-60 kg of water for spraying. For granular formulations, about 3-5% concentration is used, with 1-1.5 kg per mu (approximately 667 square meters) being standard.
2. On fruit trees, it can be used to treat apple leafhoppers, citrus leaf miners, peach aphids, and pear star caterpillars. It is usually diluted at a ratio of 25 to 500 times with water before application.
When using this insecticide, it's important to follow safety guidelines:
1. The Pesticide Network advises that insecticide double should not be applied more than three times on rice crops, with a minimum interval of 15 days between the last two applications.
2. Due to high summer temperatures, there is a risk of phytotoxicity. Therefore, it should not be applied to cruciferous vegetables like Chinese cabbage or cauliflower, especially during the seedling stage.
As with all pesticides, proper handling and adherence to instructions are essential to ensure effectiveness and minimize environmental impact. Always wear protective gear and avoid applying under windy conditions or when rain is expected shortly after. Regular monitoring of pest populations and crop health will help determine the best timing for application.
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