The use of chemical fertilizers to control pests and diseases of agricultural, forestry and flower crops not only reduces the phytotoxicity caused by improper use of pesticides, but also effectively promotes the growth of crops. It is a safe, economical and effective method. The insecticidal methods of several commonly used fertilizers are introduced as follows:
Urea, ammonium bicarbonate, ammonia water to kill insects. These three ammonia fertilizers have strong volatility and are irritating, corrosive and fumigating to pests. Especially for red spiders, spider mites, locusts, thrips and other pests with small body shape and weak endurance, the control effect is especially good. If 2% urea solution or 1% ammonium bicarbonate solution or O.5% ammonia solution is used, spray the roots outside the flower pests, spray once every 7 days, spray 2 to 3 times, and prevent insects. The effect is good. Each mu of nursery is mixed with 15 to 25 kg of ammonium bicarbonate and farmyard manure to the bottom of the ridge, which can reduce the damage rate of underground pests such as cockroaches by more than 80%. Herbs and flowers can be used to recover 20 kilograms of ammonium bicarbonate per acre, which can greatly reduce the harm of underground pests such as small tigers. Ammonia can also kill pests such as snails and cockroaches.
Phosphate fertilizer can kill insects and sterilize. Spraying cotton with 2% superphosphate solution can drive away the bollworms that lay eggs and kill pests such as cotton red spiders and cockroaches. Spraying tomato with 1% calcium superphosphate also has a significant effect on preventing umbilical rot.
Silicon fertilizer can fight pests. When fertilizing agricultural and forestry flower crops, the silicon-calcium fertilizer is mixed. After the crops are absorbed, the silicon elements will accumulate in the epidermal cells of the crops, forming a very hard skin layer, which makes the pests difficult to invade, thereby enhancing the resistance to pests. Especially in the application of silicon-calcium fertilizer on herbal flowers, the insect-resistant effect is better.
It can be used to kill insects with grass ash. Use 10 kg of grass ash to 50 kg of water, soak for 24 hours, then spray it with the filtrate, which can effectively control the aphids on fruit trees, crops and flowers. Potassium in the ash can also enhance the lodging resistance of the crops, enhance the fruit trees and The wind resistance of flowers. For example, adding appropriate amount of trichlorfon in the ash and ash liquid will increase the contact and fumigation effects of the medicament, and improve the killing effect on pests such as aphids and spider mites. In addition, the tomato plant can be sprayed with 500 times potassium dihydrogen phosphate to control the mosaic virus. Spraying cucumber with 0.2% boric acid solution can control cucumber downy mildew.
Medicinal fertilizer kills insects. Mix 1% urea with 50% dichlorvos or 40% imipenem to kill red spiders on cotton and flowers, and treat other pests. Use 3.8 kg of ammonium bicarbonate and 0.5 kg of copper sulfate to be ground into a powder, mix well, add 1 kg of lime, mix well, put in a container or airtight plastic bag and close the copper ammonium powder prepared after closing for 24 hours. It can not only prevent fungal and bacterial diseases, but also play a role in topdressing.
Urea, ammonium bicarbonate, ammonia water to kill insects. These three ammonia fertilizers have strong volatility and are irritating, corrosive and fumigating to pests. Especially for red spiders, spider mites, locusts, thrips and other pests with small body shape and weak endurance, the control effect is especially good. If 2% urea solution or 1% ammonium bicarbonate solution or O.5% ammonia solution is used, spray the roots outside the flower pests, spray once every 7 days, spray 2 to 3 times, and prevent insects. The effect is good. Each mu of nursery is mixed with 15 to 25 kg of ammonium bicarbonate and farmyard manure to the bottom of the ridge, which can reduce the damage rate of underground pests such as cockroaches by more than 80%. Herbs and flowers can be used to recover 20 kilograms of ammonium bicarbonate per acre, which can greatly reduce the harm of underground pests such as small tigers. Ammonia can also kill pests such as snails and cockroaches.
Phosphate fertilizer can kill insects and sterilize. Spraying cotton with 2% superphosphate solution can drive away the bollworms that lay eggs and kill pests such as cotton red spiders and cockroaches. Spraying tomato with 1% calcium superphosphate also has a significant effect on preventing umbilical rot.
Silicon fertilizer can fight pests. When fertilizing agricultural and forestry flower crops, the silicon-calcium fertilizer is mixed. After the crops are absorbed, the silicon elements will accumulate in the epidermal cells of the crops, forming a very hard skin layer, which makes the pests difficult to invade, thereby enhancing the resistance to pests. Especially in the application of silicon-calcium fertilizer on herbal flowers, the insect-resistant effect is better.
It can be used to kill insects with grass ash. Use 10 kg of grass ash to 50 kg of water, soak for 24 hours, then spray it with the filtrate, which can effectively control the aphids on fruit trees, crops and flowers. Potassium in the ash can also enhance the lodging resistance of the crops, enhance the fruit trees and The wind resistance of flowers. For example, adding appropriate amount of trichlorfon in the ash and ash liquid will increase the contact and fumigation effects of the medicament, and improve the killing effect on pests such as aphids and spider mites. In addition, the tomato plant can be sprayed with 500 times potassium dihydrogen phosphate to control the mosaic virus. Spraying cucumber with 0.2% boric acid solution can control cucumber downy mildew.
Medicinal fertilizer kills insects. Mix 1% urea with 50% dichlorvos or 40% imipenem to kill red spiders on cotton and flowers, and treat other pests. Use 3.8 kg of ammonium bicarbonate and 0.5 kg of copper sulfate to be ground into a powder, mix well, add 1 kg of lime, mix well, put in a container or airtight plastic bag and close the copper ammonium powder prepared after closing for 24 hours. It can not only prevent fungal and bacterial diseases, but also play a role in topdressing.
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