Cauliflower, commonly known as cauliflower, requires high cultivation techniques and strict environmental conditions. In production, due to unfavorable environmental conditions and improper management, there are physical diseases such as non-knotted balls, premature balls, and poor flower balls, which seriously affect economic benefits. The causes and prevention measures are described as follows: No flower ball: Cause: Autumn sowing varieties are sown early, the temperature is high, and the broccoli seedlings have not passed the vernalization stage because they have not been exposed to the low temperature environment. Knot ball. Spring sowing varieties are more resistant to cold and strong in winter, and the temperature conditions required during the vernalization stage are low. If used for autumn sowing, it is difficult to pass through the vernalization stage, resulting in no flowering. In addition, during the vegetative growth period, too much nitrogen fertilizer is supplied and there is no seedling emergence. The stems and leaves are so long that a large amount of nutrients are used for the growth of stems and leaves, which can also lead to the formation of flower bulbs or premature disintegration. Control methods: Correct selection of varieties, appropriate sowing, creation of conditions through the vernalization stage, appropriate top dressing, seedlings, etc. Small Flower Ball: Cause: A small amount of autumn seed seeds will be mixed in the spring sowing ground. A small number of flower balls will appear in the ground. If the autumn sowing variety is fully utilized in spring sowing, there will be a large number of small flower balls. This is because the autumn sowing varieties are mostly early-middle-maturing species, and their winters are weak, and the flowering balls are started through the vernalization stage. At this time, the leaves and the plants haven't grown yet, and the nutrition is not enough, so the formed curd is smaller. In late-maturing varieties used in autumn sowing, if mixed with a small number of early-maturing varieties of seeds, these early-maturing varieties earlier started to pass through the vernalization stage and the bulblets were smaller. The late-maturing species is larger and the stems and leaves are lush. As a result, early-maturing plants are suppressed and shaded, often forming small flower balls. Autumn sowing early maturing species, such as sowing too late, leaves not fully grown, that is encountered in the formation of flower bulbs in the formation of temperature conditions, and soon formed a flower ball. Due to its small size, its flower buds are also small. In addition, the Chen species and the weak species grow weakly after sowing, the stems and leaves do not thrive, and after passing through the vernalization stage too early, malnutrition will also result in the formation of small flower bulbs. During the growth period, the lack of fertilizer and water, soil salinization, pest damage, etc., will form a small flower ball. Control methods: Use pure and appropriate seeds, master suitable sowing time, and strengthen field management. Preceding shots: Symptoms and causes: In the seedling stage of cauliflower, flowers and bulbs appear when the stems and leaves have not yet grown. This kind of curd is stiff. The reason for this is that the autumn sowing variety is weak in winter, and it is easy to pass through the vernalization stage. If it is used in spring sowing, the flower bulb will appear prematurely. Early spring planting sowing, seedling long-term low temperature, or lack of water and fertilizer, plant injury, etc., affecting the normal conduct of vegetative growth, induce flower bud formation in advance, the early ball. Late in the autumn sowing, the temperature is getting lower, and the ball will be played before the verdant period is too fast. Control methods: Use suitable seeds, master suitable sowing time, and strengthen water and fertilizer management. Hair flowers: Symptoms and causes: The non-sequential elongation of the styles or filaments of the flower buds makes the surface of the flower buds appear wooly and unclean, which reduces the value of the commodity. Most of the hairs occur when the flower ball suddenly cools, warms up, or re-falls when it is ripe. This is due to the dramatic temperature change and the unfavorable temperature conditions that result in the development of the filaments over the flower bulbs. When planting normally in autumn sowing, it is too early to sow, and if the harvest is not timely, the temperature drop will be prone to hair growth. Early maturing varieties are more prone to flowering. Control methods: timely sowing, appropriate harvest.
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