Can corn herbicides be mixed with pesticides? When is the highest yield of topdressing?
Recently, spring corn has been planted in many places. Is it appropriate to spray herbicides on corn mash? Which pesticides can be mixed with herbicides? When is the top dressing suitable and how to topdress? Have you figured it out?
Question 1: When should the cornfield herbicide be played?
Corn herbicides must wait until the corn clover is a heart to fight!
Corn has three leaves, that is, there are three unfolded leaves and an unexpanded new leaf on the corn plant. This is the three-leaf stage of corn, commonly known as the three-leaf one heart. Farmers must learn to distinguish between cockroaches and the three-leaf period. If you mistake the two leaves and one heart for the three-leaf period, your killing agent is early, and the corn is too small to hold.
When the corn grows to the three-leaf stage, the physiological function of the corn begins to be strong, and the secretion of a large amount of ketone can effectively resist nicosulfuron. So it is time to fight herbicides at this time.
Question 2: Which pesticides can be mixed with corn herbicides?
It can be mixed with avidin, avermectin, and pyrethroid pesticides. But it must be sorghum avermectin. If some small factories are cheap, don't mix them!
In addition, corn herbicides are strictly prohibited to be mixed with organophosphorus pesticides!
Such as omethoate, carbofuran, chlorpyrifos, etc. can not be mixed. In particular, the addition of carbofuran can not be mixed, otherwise the corn will never be harvested!
Question 3: How to topdress corn?
The following 3 kinds of mistakes are fattening, have you ever experienced:
1, the topdressing time is relatively late, until the corn heading, only to topdress.
2. No matter what kind of fertilizer, all of them are applied at once, and some are applied at the time of sowing.
3, the weather does not rain, do not topdress, do not look at the growth of corn in the ground, if it does not rain, do not chase.
The following small series will specifically tell you about the corn topdressing, in five points:
1. The problem of topdressing period: During the growth period of corn, the best topdressing time is in the big trumpet period, because the nutrients needed at this time are relatively large, and it is also a key period in the growth process. How to judge the big horn What is the mouth period? Generally, when the corn leaves are 11-12 pieces, the leaves are unfolded and look like a big bell mouth, so it is called the big bell mouth period.
2, choose what fertilizer problem: corn topdressing, most of the friends will choose urea, this is correct, but it is recommended to be able to match a pot of fertilizer, although corn is said to be a nitrogen crop, but potash is not negligible.
3, need to chase several times: Under normal circumstances, corn topdressing needs two times, that is, small bell mouth and big bell mouth period, but due to the limitations of agricultural machinery, most farmers are chasing once.
4, the problem of topdressing method: the most correct way is to plan the pit deep application, and then cover the soil, so that the utilization rate of fertilizer is improved, and it is also a good way to topdress in the ditch. If you have more friends, you can choose this, not recommended. Everyone spoke, although it said that fertilization is fast, but the waste is also serious, and the absorption rate is greatly reduced.
5, the problem of topdressing amount: said above, corn is a nitrogen crop, take urea as an example, talk about the amount of things. The amount of urea is not fixed. It is determined according to the fertility of the soil. Under normal circumstances, each mu is about 20 kg. If the fertility of the plot is good, it can be reduced to about 15 kg. If the fertility is poor, it may be appropriate. Increase to about 25 kg.
In addition, remind us that when the land is dry, watering should be done after topdressing, or after the rain, timely topdressing.
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