Every summer, there are many growers who report that the number of female flowers in melons is reduced, and the light grows in trees. Next, we listened to the people concerned to support the issue and solve the problem of low yield of female flowers and vegetables in melons.
The number of female flowers is less
Vegetable Nongjia: My loofah has more than 20 leaves, but I haven't seen a single flower, let alone the shadow of a female flower. For this reason, I have also taken many measures but the effect is not good and I am eager to find a solution.
Cai Nong B: I chose an all-female cucumber variety. After summer planting, the number of female flowers is not very large. After the temperature is lowered, the characteristic performance is particularly obvious. The number of female flowers is large, and the flowers are in one section.
Planting masters have their own coup
High-handed A: The temperature at the early stage of colonization of cucumbers is high, and the flower buds are poorly differentiated, often resulting in fewer female flowers. I usually spray ethephon or guarana during the seedling stage to promote female flower differentiation.
When the cucumbers are generally in 1-2 true leaves, the flower buds of leaves from leaves 2 to 11 are gradually differentiated, but the sex is not yet determined. The best effect of spraying ethephon during this period is. At the time of reaching the four true leaf stages, the sex of the flower buds has been determined, and the use of ethephon does not have the effect of inducing female flowers on the flower bud differentiation in the early stage. Only the flower bud differentiation after 10 leaves can be affected. The appropriate concentration of ethephon to control cucumber sex is 2500-3000 times that of 40% ethephon. If the temperature is still very high afterwards, it can be sprayed once a week for a concentration of 3000 times. However, cucumber treated with ethephon shortened the internodes, increased female flowers, and had female flowers within almost 20 knots of the plant. During this period of time, the nutritional requirements of the plant's squash were strong. To prevent the development of the melons and deformed melons and ensure the normal development of the cucumber larvae, we must strengthen management, ensure sufficient supply of fertilizers and water, rationally sparse melon, and strengthen the control of pests and diseases.
Master B: Loofah likes high temperature, however, in the seedling stage, the growth temperature of loofah should not be controlled very high, otherwise it is easy to promote plant lengthiness, the stalk is weak, and flowering can also be affected. In the summer, the temperature in the booth can easily exceed 35°C, and the ventilation condition is not good or even exceed 40°C. Under high temperature conditions, fertilization is very large, especially with partial application of nitrogen fertilizer, and with sufficient moisture, it is very easy to cause the loofah plants to prosper. In addition, many vegetable farmers do not pay attention to regulate the night temperature, the minimum temperature in the night greenhouse is also above 20 °C, which will lead to female flower differentiation stage to increase, delay the time of flowering.
Pay attention to management and increase fruit
In recent years, there have been many strong female and all-female cucumbers on the market. These varieties do show a large number of female flowers, but this needs to be based on reasonable environmental conditions and plant growth. At the same time, the stronger the cucumber females, the lower the disease resistance. Taken together, the characteristics of strong female or all female are double-edged swords, and it is necessary to create reasonable conditions for cucumbers, which is conducive to flower growth and fruit promotion. Therefore, even if a vegetable farmer chooses such a variety, he should pay attention to regulating plant growth, shortening the sunshine hours, and reasonably spraying pesticides.
In addition to genetic factors, flower bud differentiation is directly affected by the temperature and length of sunshine. High-temperature long-day sunshine is usually conducive to the differentiation of male flowers, female flowers are relatively reduced; low-temperature short-day is conducive to female flower differentiation. Therefore, when growing summer vegetables such as gourd, cucumber, etc., we must pay attention to seedling management, physical measures such as lowering the temperature, shortening the light time, increasing the humidity, raising the carbon dioxide concentration, and spraying 40% ethephon at the seedling stage to increase the number of female flowers. Therefore, the experience of many vegetable farmers above is worth drawing lessons from. It is necessary to remind everyone here that if you choose to spray ethephon to promote female flower differentiation, the time will not be too late. If the plants are too large, premature aging may easily occur.
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