I. Quarantine and manual weeding measures
1. Don't adjust or plant seeds from the area of ​​occurrence, select seeds before sowing, and eliminate weed seeds, alfalfa grains and miscellaneous grains.
2. Do not use farmyard manure containing wheat straw and wheat bran in wheat and corn fields.
3. For wheat fields with less weeds or poor control effects, weeds should be completely removed at heading stage of weeds, including weeds in the fields and roadsides.
Second, chemical weeding
1, control medication:
3% Shima oil suspension (methylsulfuron); 3.6% Kwong Shima water dispersible granules (methylsulfuron+methyl iodosulfuron sodium).
2, the amount of use:
Sema 25-30ml/mu + safener (with Bao) 75-95ml/mu (2-3 sets)/mu 30 kg water; Kwastma 20-25ml/mu + safener (with Bao) (80- 100ml)/mu, ie, 2 to 2.5 sets per mu, and 30 kg of water can be used to cure broad-leaved weeds.
3, master the appropriate application time:
Herbicides are used as much as possible before winter to ensure good weed control and high safety. Specific requirements:
(1) To see the seedlings: the post-emergence 3-6 leaf stage of winter wheat, and the 2-5 leaf stage of grass weeds (before the two tillers), basically the Qimiao.
(2) Look at the weather: Use it best when it is sunny and free from frost and heavy rain for 4 days. The best use temperature is 10-20 °C, good light at noon, high temperature and best use, can be basically absorbed within 4 hours. The minimum temperature during medication is generally not lower than 4°C.
When the crops grow badly, or when the following conditions occur: rainy days, low-lying water, muddy and wetlands, salinity or land damage, frost damage, salt damage, pests and malnutrition, or heavy rain or frost within 4 days after application ( When the lowest temperature is lower than 3°C), it is forbidden to use the agent, and the wheat field must not be flooded with water for 2 days before and after application to avoid phytotoxicity.
4, use method:
During the application, the bundling of the preparations and the accompanied treasure (safety agent) are mixed into the mother liquor, and then poured into a sprayer equipped with water and stirred well. Each pack of medicament was sprayed with nebulizer water (16 litres). Must pay attention to the spray should be at a constant speed, uniform spray, is strictly prohibited "grass multi-spray," is strictly prohibited re-spray, missing spray or over-range use. The optimum amount of water used in the wheat field sprays is: 15–20?/mu for motorized sprayers and 30?/mu for manual sprayers.
5, matters needing attention:
(1) Herbicides should be used alone, and they must not be mixed with other herbicides, pesticides, and foliar fertilizers. It is forbidden to mix with 2,4-distillate and long-lived herbicides. If there are many types of broad-leaved weeds in the wheat field, they can be sprayed for another 1-2 weeks after spraying Sema or Maxima.
(2) It is forbidden to use during the low temperature frost period in winter and the jointing of wheat after jointing, so as to ensure the efficacy of the pesticide and avoid the residual impact on the crops after the crop. Prevention and control of weeds at the edge of the field and the land must be controlled at the same time.
(3) The pesticide has a certain role of seedlings, and some crop varieties may have temporary yellowing or dwarfing in the early growth period after application. Under normal use conditions, the yellowing of wheat naturally disappears after turning green, which can prevent the wheat from lodging for a long time and increase the yield of weeds significantly.
(4) Do personal protection work when spraying. If wearing a protective goggles, masks and gloves, wearing protective clothing, prohibiting diet and smoking, thoroughly wash exposed skin with soap and water before use. If the skin has a persistent sensation, consult a doctor. If the liquid spills into your eyes, flush with plenty of water for 15 minutes and seek medical advice.
(5) Adaptation to wheat varieties. After many years and many trials on different wheat varieties, it was confirmed that Shima and Kashima are very safe for most of the winter wheat varieties grown in our province (except for unexamined varieties). However, it has some influence on some spring wheat varieties with strong springiness and strong gluten (horny or hard) type. Please consult with the relevant users before consulting the relevant species for the species they belong to. Then do a small area test first. , and then use a large area according to the situation.
Note: Herbicides should be used with caution. Improper use can cause phytotoxicity. The plant protection technicians should understand the details before promoting the technology, and conduct a small-scale safety verification test on the two herbicides. They can use it only after grasping the safety experience.
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