Causes and control measures of maize tassel failure

Corn, as the main food crop in China, is one of the important economic crops in China, but in recent years, the phenomenon that corn does not spike is becoming more and more serious, which seriously affects the yield of corn and brings great economic losses to farmers. So what is the nutrition of corn without tassel? Let's get to know it.

1. Symptoms of no tasseling

Maize without male ear can be realized into three symptoms: first, no male ear at all; second, the male ear is short, only about 10 cm, and there is no branching and anther phenomenon; third, the male ear is only 2-3 branched, and only a small amount of anther and pollen are found on the male flower of the main axis. No matter which the above three symptoms are, they can cause serious absence of pollen or very little pollen, resulting in the inability of corn to pollinate normally and affect the yield.

2. The reason for not picking the male ear

There are many reasons why corn does not spike, first, the soil is dry, it is more sensitive to water when the maize is heading, and if the water is insufficient, the male ear will not be pulled out well or not, which can not be inseminated normally; second, the nutrition is insufficient. After the corn enters the jointing stage, the vegetative growth is accelerated, and the demand for nutrients during the differentiation of the male ear is increasing day by day, if the lack of nutrition is also the reason why the male ear does not pick. Third, drug damage, with the extensive application of herbicides, it will seriously affect the normal growth of corn, serious cases will lead to no male ear or reduce yield, or even no harvest; fourth, diseases and insect pests of corn become more and more serious. the diseases and insect pests of normal corn without male ear are smut, rough shrinkage, corn borer, aphids, red spiders and so on. Fifth, the light time is too long, corn is short-day sunshine, under short-day conditions can normally male, blossom and bear fruit, if the daily light time is more than 12 hours, it will lead to the phenomenon of improper courtship or no male.

3. prevention and control measures

In order to ensure the water supply at the ear stage of corn, the areas with good conditions should be irrigated twice at the jointing stage and the first half of the heading stage, and those with poor conditions should do a good job in drought prevention, ploughing and loosening soil after rain, and water conservation. The nutrition demand of maize should be ensured at the heading stage, and the fertilization time and amount should be determined according to the field fertility. The fields with good fertility and strong seedling growth can be applied less and late, while the fields with barren land and weak seedlings should be applied more and early. Topdressing was carried out in two stages, the first was combined with watering at jointing stage, 5-7 kg of urea or 15-20 kg of ammonium bicarbonate per mu was applied, and the second was carried out 10-15 days before heading, combined watering with 10-15 kg of urea or 30-40 kg of ammonium bicarbonate per mu. When using pesticides, we should pay attention to the types and concentration of agents, pay attention to the prevention and control of diseases and insect pests, and treat diseases in time.

The above is the introduction of the reasons and control measures for the non-heading of corn. I hope it can help you. If you want to know more about it, please pay attention to us.