What about the drug damage caused by the application of herbicides to rice?

What if herbicides are applied to rice to cause drug damage? In order to increase the efficacy of herbicide and expand the herbicide spectrum, most compound herbicides contain benzenesulfuron-methyl, pyrimidinosulfuron-methyl, Acetochlor, etc., if farmers do not know how to use, it is easy to cause drug damage. 1. Judgment of drug damage due to retting root, element deficiency or diseases and insect pests, rice sometimes appears symptoms similar to herbicide damage, but through investigation and analysis, we can still judge whether it belongs to herbicide damage or not. The main results are as follows: 1. Judging from the period and amount of pesticide application, if the time of applying pesticide to control diseases and insect pests is 1-2 days after rice planting (throwing), it is more sensitive, and sometimes drug damage occurs. High dose application of individual pesticide products is also prone to drug damage. 2. Check the condition of fertilizer, water and soil: if the irrigation is too deep (immersion growth point) after medicine, it is easy to cause drug damage. Check whether improper fertilization or application of immature organic fertilizer, or improper retting of straw green manure caused poor plant growth symptoms. 3. Check the diseases and insect pests: the rice plants damaged by rice tube thrips and rice root leaf beetles will become short and clustered, the leaf tips will turn into tubular curls and become withered and yellow, and the whisker roots will be short. The main symptoms of rice common dwarf disease are yellow and withered leaves, dwarf plants, fade from the top leaf tip and appear broken patches, but the leaf veins remain green, and the leaves often show obvious yellow-green stripes. 4. look at the growth of grain seedlings before and after pesticide application: after planting (throwing) rice seedlings back to green (setting up seedlings), if the abnormal symptoms occur after pesticide application, and the normal growth of other seedlings of the same quality and variety adjacent to the same field may be drug damage. Remedial measures 1. Replanting (throwing) seedlings: after diagnosis, it is confirmed that the drug damage of the seedlings is serious, and the etiolation of the seedlings accounts for more than 80%. The seedlings should be replanted (thrown) immediately. Method of operation: first drain the clear water, plough once and then discharge the turbid water, and then plant (throw seedlings). In recent years, the sowing and transplanting (throwing) seedling season is 7-15 days earlier than the traditional season. It is found that the time from drug damage to supplementary insertion is generally 5 to 10 days, and the seasonal contradiction is not prominent. 2. Strengthen fertilizer and water management and mid-ploughing: when it is found that drug-damaged fields should first clear the field water that has been applied and fill it with fresh live water. The second is ploughing in the field, turning the chemicals absorbed by the topsoil into the deep soil to reduce the effect of chemicals on rice roots. 2kg / mu of imported compound fertilizer was applied 2 to 3 days after cultivation to promote root and leaf growth. 3. Application of rooting agent: after drainage, field cultivation and fertilization, it is best to apply 200mg / kg rooting agent abt200 kg per mu, which has a better effect on promoting roots, and the number of roots can be increased by 25% to 40%, which can accelerate the growth rate. Click to see more herbicide application techniques click to see more pesticide use techniques