Is it harmful to spray corn during the flowering period? How many days does corn bloom?

Harmless, it is necessary to spray, the corn flowering period is generally in summer, and often encounters rainy, high temperature and dry weather. Unfavorable climate change will cause some diseases in the flowering period of corn, such as aphids, spider mites, sheath blight, etc.

At this time, spraying is very harmful, because it is easy to cause corn death, so it is not recommended to spray at the flowering stage.

Pesticides can be sprayed moderately during the flowering period of corn, but it should be limited, otherwise it will affect pollination and cause the corn cob to be not full.

The flowering period of corn lasts about 7 to 10 days. Between July 15 and August 10 each year, most of the corn blooms during this period.

The flowering period of corn varies depending on the variety, and is generally about 15 to 25 days.

To fight, but the disease can be prevented, you can use good fertilizer, such as imported water-soluble fertilizer, nutrition, high absorption and utilization rate, but also effective control of various pests and diseases, of course, if it is a very serious disease problem, then you need to use medicine, fertilizer can only be alleviated, can not be solved.

In the booting stage of corn, that is, after the corn appears "big flare", the female spikelets and florets of corn begin to differentiate, and timely re-application of bract fertilizer can promote the normal development of ears and increase grains, generally 14 days before heading. If the base fertilizer is insufficient and the growth of corn is weak, it is necessary to increase the amount of fertilizer, and the rotting farmhouse fertilizer and Yanwo microbial agent can be applied per mu, and at the same time, according to the soil moisture, appropriate watering to replenish the water.

Proper fertilization at the flowering stage can prolong the grain filling period of corn, promote grain filling, improve seed setting rate, and increase yield. If in the early management, the fertilization is insufficient and the soil nutrients are insufficient, it is best to apply an appropriate amount of tapping fertilizer. It can be used per mu with water-soluble fertilizer and high phosphorus fertilizer, mixed with an appropriate amount of fine soil, and applied near the roots of the plant, but do not directly contact with the root system.

If the soil moisture is insufficient, it can be used to irrigate the roots of the plants with fertilizer and water.

It is necessary to fight, but it can not be played before the seedlings, and the pesticides for insect control should be played within 6 to 10 leaves after the seedlings, otherwise the insect pests will be found.

The continuous rainy weather will lead to the corresponding weakening of light intensity and time, the decrease of photosynthesis of maize plants, the reduction of maize ability to synthesize dry matter, the inability to meet the normal growth of crops, the inhibition of maize plant growth, the poor flowering moisture, and the serious impact of yield. Cloudy weather can also reduce temperatures, shorten the flowering time of corn ears, reduce flour count, reduce pollen activity, reduce moisture quality, and reduce seed setting rate. In the continuous rainy season, how to ensure the moisture effect of corn pollen?

The first thing to do is always pay attention to the weather forecast. We farmers are a group of people who eat on our backs, and the weather conditions are too important to us. When it rains during the male selection period, some conditioners can be sprayed to delay the time for the corn to select males, and choose to avoid cloudy weather.

Spraying 1000 times the solution of fertile leaf boron fertilizer in maize before selecting males can promote the amount of pollen produced by maize, thereby increasing pollen activity. Artificially assisted water is the most direct way to improve the quality of water, and it is also very effective. In addition, it should be noted that continuous rainfall not only affects moisture, but also easily causes some diseases, so it is necessary to prevent diseases.

When planting maize, some farmers often plant high-yielding varieties that tend to be less resistant to abnormal weather. In the case of continuous high temperature weather, especially when the temperature exceeds 38, the moisture of corn is poor and the spikelets are insufficient. Similarly, during the ongoing rainy season, high humidity and little light affect moisture, resulting in low pollen vigor and reduced yields.

Moreover, the resistance of the corn itself will be weakened on rainy days, and diseases will occur accordingly, and the continuous rain may cause the corn to fall. In the process of growing corn, in order to reduce the effects of high temperature or rain, the most important thing is to improve the stress resistance of the corn, and then master some relief methods in order to minimize the loss.

Corn resistance is not only related to variety, but also to our daily management. Based on root topdressing, you can also eat zinc, boron fertilizer, potassium dihydrogen phosphate, amino acids, moss and other foliar sprays to improve the stress resistance of corn and prevent pests and diseases. These can promote the growth and development of corn.

Spraying foliar fertilizer in dry areas can add water and nutrients to the leaves. It usually takes 5-7 days for the whole plot of corn to be watered, whether it is a high temperature and drought or a continuous rainy season, let's first look at the growth of corn. Short rainy days or relatively small rains have little effect on corn moisture.

The most terrible thing is the rainy or hot weather during the moisture period. In this case, artificially assisted pollination on a sunny day should be considered. At the same time, it is necessary to see if there are diseases in the field, so as not to affect the final yield.

Influential. It rains constantly. It is easy to flush the pollen away. Unfavorable for pollination. If it's cloudy, it's fine. So there is an impact.

Continuous rainy days have a little effect on corn pollination, as long as it is not 10 days and 8 days of cloudy rain, it has little impact on corn yield.

During the flowering period of maize, if it is in continuous rainy days, it will have an impact on maize pollination. Corn pollen is easily washed away by rain, which is not conducive to pollination.

It's just that on a rainy day, it will definitely have an impact on corn pollination, because it is cloudy, and it is not tired of pollination.

The continuous rain will definitely have a certain impact on the pollination of poplar flowers of maize. Because the pollination conditions of corn are related to temperature, humidity and wind, corn pollination is the best suitable period for corn pollination when the temperature is about 25 degrees and the field humidity reaches 30%; When the temperature exceeds 35 degrees and is lower than 18 degrees, it will increase the difficulty of corn pollination, which will cause incomplete or poor pollination of corn; The continuous rain not only reduces the field temperature, but also causes the pollen adhesion of the male panicle, the pollen absorption swelling and rupture, the pollen activity is poor, and the pollination quality is reduced, resulting in the convex tip of the corn at the booting stage, the cob becomes smaller and shorter, the panicle grain is not satisfied, and the empty bract grains are deflated, which affects the quality and yield of corn.

When it continues to be rainy days, it has a certain impact on the pollination of corn, if the weather has been cloudy and rainy, the pollination will not be too good, and it will affect the yield of corn.

Rainy weather during the flowering period of corn has a great impact on the yield. Because corn is cross-pollinated, it is easy to be limited by environmental conditions and cannot get the opportunity for pollination, such as wind pollination without wind, and the pollen is washed away by rain, and insect pollination is due to heavy rain, low temperature or strong wind, and there is a lack of enough insects to participate in pollination, thereby reducing the chance of pollination and fertilization, and affecting the yield of corn.

It has no effect, when planting corn, this piece is planted very much, as long as there is wind, it will not be affected.