Causes of topping of cucurbit flower and its control measures

Zucchini cultivation in the greenhouse is extremely prone to flower topping phenomenon, zucchini flower topping phenomenon will seriously affect the yield, especially the early yield, generally can reduce the yield by 30% and 40%. So what is the cause of the topping of western gourd flowers? How to prevent and cure it? Let's get to know it with the editor.

1. Squatting seedlings too much

Squatting seedlings can be controlled to promote up and down, which is conducive to the cultivation of strong seedlings, but if squatting seedlings for too long, or soil drought will lead to stem tip growth point malnutrition, weak growth, leading to cauliflower topping.

Prevention and control methods: squatting seedling time should be appropriate, do not over-squat seedling, in addition, the soil can not be too dry, flower topping initial stage should be timely and appropriate watering, so that the soil water content is kept at about 20%. At the same time, applying some available nitrogen fertilizer with water to promote plant vegetative growth, or spraying gibberellin can also promote stem and leaf growth.

2. Low temperature

The suitable temperature for the growth of zucchini is about 18-25 degrees, below 15 degrees will lead to poor growth, and below 11 degrees will stop growing. If the cold current invades in winter and early spring, resulting in a temperature between 11 and 15 degrees in the shed, or even a low temperature of 0 degrees, its growth nodes will also stop growing, resulting in maladjustment of growth and development, causing male flowers to hold the top and appear flower topping.

Prevention and control methods: the temperature should be strictly controlled, especially the low temperature at night, so the night temperature should be kept above 15 degrees in the seedling stage and the initial stage of planting. If the temperature is too low, a straw curtain should be added around the greenhouse, and a small arch shed should be built in the shed. If possible, smokeless warming measures such as laying ground hot lines or installing electric stoves and charcoal fires can be adopted.

3. Root system damage

Because seedling transplanting leads to root damage, or retting roots caused by too much water, and root damage caused by too much fertilization will also lead to frustration of growth nodes and the formation of flower topping.

Prevention and control methods: pay attention to do not hurt too much roots and appropriate watering, especially in cold season to prevent retting roots; fertilization should be reasonable formula, not too much blindly, in order to prevent root burning. In addition, all the small melon embryos in the upper part of zucchini should be removed to reduce the plant burden and be conducive to the robust growth of stems and leaves. For plants with flowers topping, ripe melons should be harvested in time, and flowers and fruits should be thinned for those with more female flowers or melons, leaving 1 or 2 fruits per plant.

The above is the introduction of the reasons and prevention and control measures, hope to help you, want to know more related knowledge, please pay attention to us.