The high yield of corn has always been pursued by farmers. However, in addition to the varieties in the management, close planting is also the view that many farmers agree with, although this view is not entirely correct. Reasonable close planting combined with good varieties can increase the yield of corn, but densely planted corn also has drawbacks, that is, it is easy to fall, corn lodging has been a natural disaster that farmers are taboo, and corn lodging is a major factor for high yield and stable yield of corn.
Therefore, reducing the lodging of corn has become a problem that must be taken seriously. Preventing corn from lodging In addition to measures such as corn varieties and enhanced cultivation management, spraying chemical growth regulators on corn has become the most widely used technology for farmers. The use of chemical agents to control the natural growth of plants, referred to as chemical control.
Then the question is coming, what time is the best control? What chemicals are used and what are the issues that need attention? Let's talk about these issues in detail today.
First, the best time for chemical control
It is also a matter of time to spray chemical regulators, and it is a good idea to spray herbicides with our farmers. At present, the best time for chemical control is to spray the control agent when the corn is 6~12 leaves. Its main purpose is to dwarf corn plants, shorten the corn internodes, and allow more nutrients to be transported to the ear of corn, and achieve high yield of corn while lodging. It can be seen that the reason why chemical control can reduce the lodging of corn is to reduce the height of corn plants. Generally, the height can be lowered by 20-40 cm, and the ear position is also reduced by about 10 cm, so that the center of gravity of the corn is moved down, and the roots and soil are improved. The depth of the corn is reduced. In my opinion, the principle of chemical control and corn cutting is the same. Cutting seedlings also use this principle to increase corn yield. The difference is that cutting seedlings can be called artificial control.
The best time for chemical control is the period of 6 to 12 leaves of corn. What are the risks of premature and late? Premature chemical control Because corn plants are too weak and have poor resistance, it is easy to cause corn to stagnate and grow, causing damage to corn. However, if the chemical control is too late, it will cause harm to the corn, which will easily lead to the corn shrinking too late, resulting in the upper part being thick and the lower part being weak, causing poor growth and development of the corn, resulting in reduced corn production. At the same time, the maize tassels begin to differentiate after the jointing stage of corn. At this time, chemical control will affect the differentiation of maize tassels, resulting in poor pollination, causing problems such as corn ear and baldness.
Second, the choice of controlled preparations
Ecologically, as long as it can inhibit the growth of corn plants, the regulators that dwarf the corn can be used for corn control. At present, there are mainly the following types on the market:
Chlormequat
Its physiological function is to control the growth of plants, promote reproductive growth, shorten the internodes of plants, develop roots and resist lodging. It inhibits the biosynthesis of gibberellin in plants and slows the growth of plants.
2. Triazoles
Such as paclobutrazol, uniconazole and the like. The mechanism of action is to inhibit the biosynthesis of endogenous gibberellins and reduce the level of endogenous auxin in plants. Significantly reduce the apical dominance of plants and promote the growth of lateral buds, which is used in the field of fruit trees and seedlings.
Ethephon
This may not be very familiar to everyone. This is a ripening agent. It is used in the field of bananas and other fruit trees. It can also effectively dwarf plants and promote early maturity. Used in corn chemical control can significantly reduce corn plants, thereby playing a role in lodging resistance.
Points to note:
It is not easy for farmers to plant their land. Therefore, it is necessary to be cautious in the use of pesticides. If the effect is not obvious, it can be re-sprayed. If the excessive damage caused by the drug damage is irretrievable, it will be very troublesome.
Farmers' friends must strictly follow the instructions to dispense pharmaceutical liquids during chemical control, and should not increase the concentration of the liquid. Try to spray high, try your best to spray the seedlings, and do not spray on the weak land. Be sure not to spray or spray without spraying, and spray the upper blade as much as possible. In the rain within 6 hours after spraying, the liquid should be halved. In short, grasp a principle; the land that is prosperous is suitable for chemical control, and the land is not suitable for chemical control.
SARS-CoV-2 Neutralizing Rapid Antibody Test Kit(Colloidal Gold Immunochromatography) is an immunochromatographic membrane assay that uses the immuno-capture method to direct detection of total neutralizing antibodies that block receptor-binding domain (RBD) to novel coronavirus (SARS-CoV-2) from human serum/Na2-EDTA plasma/whole blood specimens.
SARS-CoV-2 Neutralizing Antibody Rapid Detection Kit is intended for identifying individuals with adaptive immune response to SARSCoV-2, indicating recent or prior infection or vaccination. Performance of the test is should not be used to diagnose acute SARS-CoV-2 infection. Testing is limited to laboratories certified to perform moderate or high complexity tests.
Covid-19 neutralizing antibody test,2019-nCoV neutralizing antibody test,SARS-CoV-2 neutralizing antibody test,New Coronavirus neutralizing antibody test,Novel Coronavirus neutralizing antibody test
Shenzhen Uni-medica Technology Co.,Ltd , https://www.unimed-global.com