"Five Methods" for First Aid in Crop Pests
October 21 05:03:13, 2018
Due to improper application or borrowing, indiscriminate use of low-quality pesticides, and non-washing and use of medical devices, crop phytotoxicity occurs from time to time, lightly affecting plant growth, and replanting the plants. Therefore, the following “five laws†emergency must be taken in light of the nature of the pesticide and the degree of severity of the injury. If the water spray and the medicine are sprayed by the leaves and the plants, and if the liquid is found early and the liquid does not completely permeate or absorb into the plants, the affected plants may be quickly sprayed with plenty of water, and the spray may be repeatedly sprayed 3 to 4 times. And with top dressing ripping, promote root development, can quickly restore normal crop growth. Supplementing fertilizer and promoting seedlings, such as foliar has produced drug spots, leaf edge scorch or plant coking and other symptoms of injury, water spray irrigation and washing medicine is basically invalid, can be applied fertilizer cultivator, Mushi urea 5 ~ 6 kg, promote plant growth and reduce Damage degree. Such as the enemy locust and other contact killing herbicides for paddy field, once the phytotoxicity occurs, as long as the top of the rice culm leaves dead, using the above measures, can be restored to normal growth after a few days. Irrigation and detoxification The poisoning caused by some poisonous soils and some herbicides can be properly irrigated or drained by serial irrigation, which can reduce the degree of injury. If the dwarfing of rice plants caused by Zhicaodan is used, irrigation and detoxification should be carried out immediately at the initial stage. Afterwards, dewfall should be drained, and then gap irrigation and topdressing of available nitrogen fertilizers, etc., can greatly reduce the harm caused by pesticides. Hormone Relief Regulators and herbicides that inhibit and interfere with crop growth can be sprayed with “9-2000†hormone plant growth regulators to reduce the extent of injury. If paclobutrazol is applied in excess, which may impede the growth of the crop, it can be sprayed with a “90%†40ppm solution and increase the available nitrogen fertilizer to promote growth. Another example is a direct-seeded paddy field, with herbicides such as 2A and 4N, crop growth is inhibited, deformed, stems shortened, roots swollen, field water can be shallowed, and spray “900†40ppm solution, recoverable after a few days Normal growth. The ploughing and replanting injury is serious, and most of the plants die. After the drug is degraded, the plowing land is replanted. Such as the use of paracetamol, Simazine, diuron, and other systemic herbicides, late symptoms of drug injury, crops gradually turn yellow, the tip slowly dry, photosynthesis damage, and even gradually starved to death. If there is a localized injury, rinse with water first, supplement the seedling with partial tillage, and apply the available nitrogen fertilizer. Severe poisoning of plots, first exposure to the sun, and then washing the drug, after plowing till the soil residue pesticides have no effect, and then planting other crops.