1, nicosulfuron
Nicosulfuron is the most widely used herbicide in corn field at present. This kind of herbicide, such as crabgrass and green bristlegrass, has a good effect. In the early years, the "safe" nicosulfuron appeared, and it was claimed that it could be used on 2~9 leaves of corn. In the past, traditional nicosulfuron was used for 3-5 leaves of corn. Although the manufacturer has publicized it, it still has certain toxicity, so be careful when using it.
2, mesotrione
Mesotrione is relatively safe for corn and can be used in general sweet corn. Popping corn and ornamental corn should be cautious, and be careful of phytotoxicity. The effect of mesotrione on Portulaca oleracea and Setaria viridis is very poor, and it is not effective on older weeds, so it is recommended to apply it early.
3. Benzoxadiazine
BASF patented compound, 2018 65438+1October 8, the patent protection has expired. Many domestic manufacturers have been following up, and it is one of the safest herbicides in corn fields, which is safe for sweet corn. This herbicide has high activity and good miscibility. A pesticide can control many kinds of weeds, but its effect on sedge is poor.
Matters needing attention in planting corn:
1, and the sowing depth should be appropriate.
Regardless of machine sowing or hand sowing, the sowing depth of corn is required to be 3 ~ 5 cm. If topping is planned, the sowing depth can be 3 cm.
2. Correct application of seed fertilizer
The suitable application rate per mu is10 ~ 20kg. Seeds and fertilizers should be planted alternately, with a spacing of about 5 ~ 7 cm.
3. Pour water in time.
After sowing, cover your head with water in time. The amount of water should be moderate, not too large, especially in deep plots, and the amount of water should be controlled.
4. The sowing amount should be even.
Before sowing, after the seeds are poured into the seeder, rotate the seed metering wheel to see if the sowing amount in each row is consistent, and then sow.
Step 5 cut down plants
Defoliation When the corn seedlings grow to 5 leaves, all the plants above 1 leaves are cut off with a blade, and 1 leaves are also removed manually.
Reference to the above content: Baidu Encyclopedia-Nicosulfuron
Reference to the above content: Baidu Encyclopedia-mesotrione