Cucumber flower topping, also known as flower head or top flower, is a common physiological disease on the cucumbers in the greenhouse. Its main symptoms are: the internodes near the growth point are shortened, and no heterozygous clusters of male and female flowers appear when no heart is formed. Flower head shape. Flower topping occurs at the beginning of the results and has a great influence on cucumber yield and quality. According to many years of experimental observation, cucumber flower topping can usually be divided into three types: First, developmental disorders. The early temperature is low, and the temperature difference between day and night is large. The plants are inhibited by vegetative growth and the reproductive growth is too fast. It is easy to have flowers topping. Second, the wounded type. In the greenhouse, high temperatures and droughts, especially when the soil is dry, are caused by too much fertilizer and insufficient water to cause root burning, or the soil is too wet. However, the temperature and the ground temperature are low, causing the roots of the roots to easily form a flower topping. Third, the physiological deficiency type. Unfavorable soil conditions, weak root activity, and difficulty in attracting fertilizers, can lead to flower topping when physiological deficiency occurs. Prevention methods: First, a reasonable control of the temperature within the shed, to prevent the temperature is too low or too high; timely soil loosening, increase the temperature, if necessary, appropriate fertilization, watering, and then loose soil temperature, in order to promote root development. Second, the rational use of fertilizer. Greenhouse cucumber fertilization, to master a small amount, multiple times, Shi Liu, the application of organic fertilizer must be fully decomposed, to prevent improper rooting due to improper fertilization; timely watering amount, avoid flooding and affecting the ground temperature, resulting in roots. Third, remedy. Plants with flowering toppings have appeared, female flowers have been removed in appropriate amounts and sprayed with potassium dihydrogen phosphate 300 times; when watering of rooted flowers occurs, watering is done in time so that the water holding capacity of the soil reaches 22%, and the relative humidity of the air reaches 65%, irrigated with water, soon return to normal. Wooden Cup,Wooden Material Cup,Wooden Cup For Reusable,Natural Wooden Cup Yangzhou Tongfun Red International Trading Co,Ltd. , https://www.i-ecbio.com