Wheat seed dressing before sowing is a measure to prevent various diseases and insect pests and ensure wheat seedlings and seedlings to work hard. Prevention and pest control combined, both with insecticide seed dressing, but also with fungicides seed dressing.
In the prevention and control of underground pests, drugs with long residual duration, stomach poisoning, and systemic absorption, and no phytotoxicity to the seeds should generally be selected. For the control of underground pests such as cockroaches and cockroaches, imidacloprid can be used: it has systemic absorption, has certain contact toxicity and stomach toxicity; it absorbs through the roots of the crop after seed dressing, and is transmitted to various parts of the plant, which can effectively control the seedling stage of the crop. Assassination and sucking insects such as locusts, thrips, leaf nails, and planthoppers, and evasions such as earthworms and earthworms, can be mixed with most of the seed treatment fungicides. Use 70% imidacloprid wet seed dressing 30g, 250-300ml of water, mix well and mix the solution, spread 25-30g of wheat seed on plastic film (can also use pot), use a good coating solution Sprinkle evenly on the wheat seeds, mix well, spread out and dry after sowing. Or choose 50% phoxim seed dressing, according to 0.2% of the seed amount, that is, 50 kg of seed medication 100 grams, 2-3 kg of water; also available 48% chlorpyrifos EC 0.3% seed weight seed dressing.
For prevention and treatment of wheat full-bleeding disease, 12.5% ​​of thifluzamide (completely eroded) suspension agent can be used for seed treatment, ie a net bag (20 ml) for complete eroding, 300-500 ml of water first, and 10-12.5 for seed dressing. kilogram.
For the control of wheat smut, choose a bag (10 ml) of 6% tebuconazole (Liquix) suspending agent, add 0.4-0.5 kg of water and apply 25-35 kg of seed dressing. Or use 50% carbendazim WP to seed dressing 0.1% -0.2% by weight, can effectively control the occurrence of wheat smut, while at the same time to cure wheat root rot, sheath blight, powdery mildew and so on.
To control powdery mildew and leaf rust, 15% triadimefon wettable powder can be used to seed 0.2% of the seed weight; or 20% triadimefon EC 0.5 kg water 2.5 kg, mixed wheat 250 kg.
Do not blindly increase the dose when dressing. If the amount of triadimefon, phoxim, etc. is too large, the seed will lose its ability to germinate, or delay the emergence of wheat, slow growth, affect the winter strong seedlings. Pay attention to the seed dressing method. Phosphate and other seed dressings should be diluted with water first, then mix well with the wheat seeds, cover the stuffy stuffing and sow; use Triadimefon and Rickett's Seed Dressing, spray the seeds with water first to wet, and then mix the medicine evenly. Mix on seeds and sow immediately after sowing or drying. If both insecticides are used for seed dressing and fungicides are used for seed dressing, insecticides should be mixed first, and sterilized for 3-4 hours before mixing with fungicides, followed by sowing.
The general insecticides and fungicides are selected in one, and mixed use of multiple agents can easily produce phytotoxicity. In strict accordance with the seed dressing operation procedures, pay attention to follow-up with the broadcast.
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