One is to clear the ditch and prevent stains. Clean up the “three ditch†in time to ensure smooth drainage and ensure no water accumulation on the surface after the rain.
The second is the application of jointing fertilizer. The jointing fertilizer should be applied in a timely and appropriate amount for different seedlings in the wheat field. Specifically, the wheat field with insufficient population and weak seedlings is expected to be plowed before the rain before the end of February and before the beginning of March. Jointing fertilizer, 7.5 kg of urea and 5 to 7.5 kg of potassium chloride are applied. Farmers with conditions can apply the amount of farmyard manure or spoiled manure and dilute manure; Wang and Zhuang Miaotian should grow wheat in front of jointing Appropriate amount of joint fertilizer. In order to achieve the effect of "controlling prosperous, maintaining stability, and promoting weak seedling transformation".
The third is foliar topdressing. Wheat grows vigorously from jointing to heading stage, so it needs a large amount of fertilizer. If it is not fertilized, it is easy to remove fertilizer. In this period, it can be combined with pest control to spray 2~3 times of foliar fertilizer, and it can be used with Shihuilongbao 80g per acre. Nopfeng 40g (or 98% potassium dihydrogen phosphate 200g), the interval between spraying and spraying is 7-10 days, which can enhance the root activity of wheat, improve its absorption, waterlogging resistance, antifreeze and lodging resistance. To avoid premature aging, but also significantly increase the 1000-grain weight.
The fourth is chemical weeding. After entering March, the early-sown wheat has entered the jointing stage, and the late-sown wheat of the single and double late rice is mostly in the stage of tillering or getting up, which is a period of vigorous growth.
It is not recommended to use herbicides for controlling weeds in grasses that have been planted early and have entered the jointing stage. It is only recommended to use 50-60 ml of chlorfluazim (chloroflupirtine) according to the grass and grass, 30 kg of water. Evenly spray to prevent broad-leaved weeds such as cattle, large nests, broken rice bran, and leeks to ensure safety.
The wheat field, which is late in the sowing date and has not yet entered the jointing stage, can prevent grass weeds such as Mai Niang, Japan, Mai Niang, and Valerian, and can use 5% macromolecule (oxazoline) in the weeds 3 to 5 leaf stage. Acetyl oxalate) 120 ml, or 15% gluten (arsenyl) 40-50 ml, 3% Shima (methyl disulfuron) 20-30 ml, 3.6% broad-staple (disulfonate-iodronone) ) 20 to 25 ml or 7.5% of priority (cetochlor) 12.5 g, etc., spray evenly on water. Control broadleaf weeds such as swine fever, beef sorghum, leeks, broken rice bran, big nest vegetables, etc., can use 15% Chunjie (difluorochlorofluoropyr) 100 ml, or 20% sharp super wheat (difluoro) Sulfosin + fluorochloropyridinium) 5 ~ 6.5 grams + special additives, evenly sprayed on water. Gramineous and broad-leaved weed mixed wheat fields, according to the grass and grass combined with the use of the above-mentioned technical measures and the amount of the drugs mentioned above, the above drugs (formulation) and dosage, 30 kg of water per acre Spray evenly.
Precautions: The chemical weeding technology in wheat fields is highly demanded. If it is slightly inadvertent, it will cause crop damage, and the crop will die. To this end, the majority of farmers must be reminded to pay attention to the following matters when carrying out chemical weeding: 1. Apply the second dilution method to the pharmaceutical liquid; do not increase the dosage of the drug, do not re-spray or leak spray; pay attention to the weather changes, avoid cold air Apply before the advent, in case of phytotoxicity; 2. Choose sunny and windless weather to prevent the liquid from drifting and harm other crops. After the jointing stage of wheat, it is forbidden to use hormonal herbicides such as 2, 4-chloro and 2,4-D; 3. Ningmai series and some wheat varieties are sensitive to clodinafop, which should be used before the use of acetylene ester. First, do a small area test, determine the safety and then use it in a large area; 4, after March 10, it is forbidden to use a single dose or compounding agent containing methyl disulfuron to prevent weeds in the wheat field.
The fifth is pest control. In March, we should focus on the prevention and control of "three insects and one disease" (ie, wheat aphid, wheat spider, midge, and sheath blight) to reduce their damage.
Control wheat aphids can use 50% peak (pyridoxone) 5 ~ 10 grams, or 22% Teflon 5 ~ 10 ml, 40% grain people 20 grams, 80% sharp 6 ~ 8 grams, 70% Amy Le 4 ~ 6 grams, 50% double electricity 20 grams, 15% gold good year 50 ml, etc., spray 30 kg of water evenly on all parts of the wheat. For the control of wheat spiders, 20 ml of 10% bifenthrin EC, or 40% Ceciester (chlorpyrifos) or 1.8% avermectin can be used to spray 45 kg of water evenly on the middle and lower parts of the wheat plant. Prevention and control of wheat larvae, in the area where the larvae are often found, can be used in the local planting station to forecast the mid-season period, using 80% of 80% dichlorvos emulsifiable concentrate, or 40% of 40% cedar (chlorpyrifos) emulsifiable concentrate, 20 kg of fine soil Evenly sprinkle it into the wheat field in the evening, and use the rope to pull or use the bamboo pole to flap the upper part of the wheat plant to make the medicine into the soil and kill the insects. After the medicine is watered or grabbed before the rain, the effect is better.
Prevention and control of wheat sheath blight, in the early stage of wheat jointing, the rate of sheath blight disease rate of 10 to 15%, the use of 6% Jingjing acne 60 ml, or 14% pebbles 40 ml, 12.5% ​​Ou Bo 30 ML, 23% honor 40 ml, 24% Kangman 20 ml, 80% tebuconazole 8 g, 30% love seedling 15-20 ml, etc., when the morning morning is not dry, apply the medicine, or increase the spray The amount of liquid is up to 45 kg, so that the liquid can reach the base of the wheat plant. After the first application of the drug-stricken area for 10 days, it will be prevented once again to improve the control effect.
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A herbicide is a pesticide used to kill unwanted plants.
Selective herbicides kill certain targets while leaving the desired crop relatively unharmed.
Some of these act by interfering with the growth of the weed and are often based on plant hormones.
Herbicides used to clear waste ground are nonselective and kill all plant material with which they come into contact.
Some plants produce natural herbicides, such as the genus Juglans (walnuts).
Herbicides are widely used in agriculture and in landscape turf management.
They are applied in total vegetation control (TVC) programs for maintenance of highways and railroads.
Smaller quantities are used in forestry, pasture systems, and management of areas set aside as wildlife habitat.
Herbicides have been alleged to cause a variety of health effects ranging from skin rashes to death.
The pathway of attack can arise from improper applicatrion resulting in direct contact with field workers, inhalation of aerial sprays, food consumption and from contact with residual soil contamination.
Herbicides can also be transported via surface runoff to contaminate distant surface waters and hence another pathway of ingestion through extraction of those surface waters for drinking.
Some herbicides decompose rapidly in soils and other types have more persistent characteristics with longer environmental half-lives.
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