Commonly used methods for chemical control of warehouse pests
1. Insecticide Phosphorus: Insecticide Phosphorus is a preferred grain protection agent in the world. Its chemical name is pirimiphos-methyl (phosphorus) phosphorus, and the common dose for controlling stored grain pests is generally 5ppm.
2. Guaranteed Grain Phosphorus: Grain Protection Phosphorus is a grain protection agent developed by the Chengdu Institute of Grain Storage Scientific Research of the State Grain Administration. It has a good control effect against stored grain pests and is particularly suitable for use in rural grain storage. The ratio between the amount of phosphorus used for grain protection and raw grain is 1:2500. That is, 100 grams of bag-preserved phosphorus per bag can mix 250 kilograms of raw grain.
When using dietary phosphorus, food must be dry (in compliance with safe moisture standards). And the food is wormless or basically free of insects.
3. Insect-resistance phosphorus: Insect-resistance phosphorus is the main agent used to prevent and control stored grain pests in rural areas. It is an efficient, low toxicity, low residue pesticide. Insecticides have long efficacy and are effective in preventing and controlling corn pests, sawfish, sawfish, and moths. Insecticide phosphorus is used to mix high-purity malathion for food, pay attention to mix evenly, it is best to mix the food before entering the warehouse in the drying field. The spraying method can be used to evenly spray the grain with a 20 ppm insecticide solution. The grain moisture should be within the safe moisture standard, that is, the water content is below 13%. It is forbidden to mix pest phosphorus and dichlorvos, otherwise it will have a toxic effect.
After the application, there should be a safety interval of four months before they can be processed and consumed.
4. Grainworm net (grain protective agent)
The grainworm net is a compound plant-based insecticide in which 4 to 6 kinds of Chinese herbal medicines are used as the main raw materials, and a small amount of chemicals is added thereto. The pests have a strong repellent, repellent, contact killing effect. It has the aromatic smell of Chinese herbs. The insecticidal effect is significant. The ratio between the net dose of grainworms and the raw grain is 1:2500, which means that 200 grams of bagged powder per bag can be mixed with 400-500 kg of raw grains.
5. Aluminum phosphide (fumigant)
Aluminium phosphide tablets are commonly used by farmers for grain storage, which is about 3 grams per tablet. The dosage is generally calculated as 1-2 tablets (3-6 g) per cubic meter. Generally 5 tablets per ton (1000 kg) of food. When the drug is applied, the tablets are first loaded into a small cloth bag (one tablet per bag). The cloth bag is tightly tied with a rope and evenly buried in the grain heap to allow the slow release of phosphine and sealing immediately after application (special attention to the seal around the bottom). To ensure the effect. After 5-6 days of fumigation, ventilation should be carried out for 3-5 days. Remove the cloth bag and choose to stay away from the water source and dig deep into the soil.
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