Causes and Control methods of empty Bud of Castanea mollissima

Chinese chestnut is our favorite fruit, but the empty bud phenomenon will lead to a serious decline in the yield of Chinese chestnut, affecting the economic benefits of growers. The so-called empty bud phenomenon means that during the growth and development of Chinese chestnut, the spiny bud stops growing and forms a sphere, while the chestnut inside is withered, with only shell but no pulp. So what is the cause of the empty bud? How to prevent and cure it? Let's take a look.

1. Malnutrition

During the fruit expansion period of Chinese chestnut, a variety of nutrients are needed. Studies have shown that the contents of reducing sugar, starch, amino acids and other trace elements in empty chestnut are much lower than those in normal growth and development of Chinese chestnut. So malnutrition is also one of the reasons for the empty bud of Chinese chestnut.

Control methods: soil is an important factor for the growth of Chinese chestnut. When planting, we should choose areas with relatively good soil fertility to plant, strengthen fertilizer and water management, scientific and reasonable watering and fertilization to meet the nutrition needs of Chinese chestnut growth. When there are symptoms caused by malnutrition, timely application of fertilizer and supplement of nutrition, before the fruiting period of Chinese chestnut, some multi-component compound fertilizer can be properly applied to reduce the probability of empty bud.

2. Poor pollination

Poor pollination is also one of the main reasons for the empty bud of Castanea mollissima. Because of cross-pollination and different opening time of male and female flowers, male flowers bloom earlier and female flowers later. During pollination, it is often spread by the wind, which limits the spread distance, so the fertilization rate of the same plant is low, and poor pollination can be caused by long overcast and rainy seasons during pollination.

Prevention and control methods: when planting, the characteristics of cross-pollination should be considered, and several varieties can be selected to match with each other when establishing the garden, which has excellent pollination effect, improve the melon setting rate and reduce the phenomenon of empty bud. Can also be in the male flower blooming period, appropriate pruning, reducing nutrient consumption, so that the plant more female flowers, can be artificially assisted in pollination, so that the fertilization rate is more than 95%.

3. Lack of boron element

In the process of practical production, it is known that boron is the most important element in the period of insemination, and the lack of boron makes the chestnut can not be fertilized normally, resulting in the early abortion of chestnut embryo and unable to form normal nuts.

Control method: during the fruiting period, boron fertilizer can be added to prevent the occurrence of this phenomenon, and borax can also be mixed with water to form dissolved oxygen. Foliar spraying can be carried out once a week for 2-3 times, and the effect is excellent.

4. Other

In addition to the above main reasons for the empty bud of Chinese chestnut, there are also some reasons that will directly or indirectly lead to the empty bud of Chinese chestnut, such as climate, varieties, diseases and insect pests, and encounter unsuitable climatic conditions when planting Chinese chestnut, such as too much precipitation, the temperature is too low or too high, will lead to the empty bud phenomenon. The fruiting ability of some varieties is not strong, and it is easy to appear empty bud phenomenon; needless to say, the cause of diseases and insect pests is a work that can not be ignored in chestnut planting, which not only causes empty bud, but also leads to large area plant death.

Prevention and control methods: choose to plant in areas with suitable climate, select varieties with good quality, constantly graft and cultivate good varieties during planting, eliminate inferior varieties in time, strengthen the prevention and control of diseases and insect pests, and treat them in time after discovery.

The above is the whole content of the causes and control methods of the empty bud of Chinese chestnut. If you want to know more about the planting of Chinese chestnut, please follow us.