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The mayor herbicide residues in my mayor include imazethapyr, atrazine, imazethapyr, trifluralin (can't grow sorghum, paddy rice), Guangmianling, doulong, and metsulfuron. Once we use these weeds, Agents should pay attention to phytotoxicity. After the emergence of light yellow leaves, wrinkled heart and leaves can not be opened, do not form leaves, starting from the leaf edge inward dry leaves.
In severe cases, the seedlings of the four true leaves of the planting stage are completely crushing to death, such as grasshoppers.
Maize, sorghum, used to in addition to Tianjin, the soil is closed to injury.
Soybean pods, peanut pods, and grasshoppers are used for phytotoxicity. Pesticide, bean grass, and bean Xerox contain this medicine.
Wheat sulphate, metsulfuron, chlorsulfuron can not be used.
To know if you have used these medicines in your package, it is best to simply test yourself:
Take soil indoor planting: Before winter, open the spring and thaw to take 5-8 points of soil, scrape the surface 5-6 cm, take half a catty soil, and control soil such as sunflower, 4-5 leaves to see, from the roots, The leaves can be discerned. Sunflowers cannot be grown on plots that use valerian.
To confirm that there are residual and must be planted:
Deep tumbling, irrigating several large waters, and treating them up and down together. Antidote before sowing, biological bacterial fertilizers, plant growth regulators, and soaking in the fertilizer before sowing. The seedlings will be 2-3 leaf stage, and the next rain and rain will be heavy. Bio-fertilizer or plant growth regulator plus foliar fertilizer 2-3 times. Antidote variety has Wotuan, Naian. Severe drug damage and destroy the species. If the root, the growing point of serious disease can not be ruled.
Correct use of herbicides to avoid the occurrence of phytotoxicity:
1. Appropriate herbicide and suitable concentration: Transplanting medlar is more than the heart of the water layer, otherwise there is phytotoxicity; rice in the low-temperature fight drugs concentration is too large to cause injury. Finger seedlings are acetochlor phytotoxicity.
2. It cannot be determined according to the wide and narrow leaves. The herbicide used before seedling after sowing can not be used after seedling, soil treatment agent can not be treated with stems and leaves. Imazeside can not be used on sunflower.
3. The whip seedlings of corn are 2,4-D phytotoxicity. More than 6 leaves of corn are caused by this medicine.
4. When stems and leaves are treated, weeds are applied before 6 leaves and seedlings are treated with 3-5 leaves.
5. The soil treatment plots are fine and flattened. Trifluralin has a good weeding effect with sunflowers. The sandy soil is used less, and the clay is used more.
6. Control perennial weeds, increase the amount of medication.
7. High temperature, high humidity, windy weather to avoid medication.
Pay attention to self-identification of drift hazards, 2,4-D ricin phytotoxicity, chicken feet, the more lighter the harm to the inside; fine quinolone phytotoxic rice does not ear. Bendason with mung bean can, cowpea can not.
Therefore, popularizing and promoting the use of herbicides is an effective way to prevent herbicides from harm.
Residual Herbicide Residue Problems and Solutions
Long residual herbicides refer to herbicides that remain in the soil after the use of certain herbicides for more than one year, and are susceptible to phytotoxicity in crops with varying degrees of sensitivity. Today, on the one hand, herbicides The herbicidal activity is becoming stronger and stronger, and the dosage is decreasing. On the other hand, the sensitivity of crops to them is becoming stronger and stronger. In production, due to the application of long residual herbicides, the occurrence of phytotoxicity to crops on the next crop is becoming more and more. Too much, it has caused undue losses to production. Therefore, we must understand some of this knowledge and must pay attention to such herbicides to damage crops.