Many people will plant zucchini, and they often find various diseases in the management process. For example, it is very common to use zucchini and melon disease. What are the reasons for the melon and how to prevent it? Let's take a look at it.
Overview of zucchini melon disease
Zucchini melon disease is one of the common diseases in production in recent years. This disease is usually within 3 to 4 days after the opening of the female flower of the zucchini. If the front part of the young fruit is greenish and yellow, it becomes thinner and softer. The fruit does not swell or swell very much, the surface loses luster, the apex shrinks and eventually rots or falls off. It affects the quality of zucchini. The occurrence and prevention measures of the disease are described below.
Silulu melon
Temperature
The temperature is too high, more than 35 ° C during the day, and higher than 20 ° C during the night, resulting in reduced photosynthesis, increased respiration, and a large amount of carbohydrates transported to the stems and leaves, resulting in long vines and malnutrition. When the temperature is too low, less than 20 ° C during the day and less than 10 ° C in the evening, the absorption capacity of the roots will be weakened, and the photosynthesis will be reduced, which will also cause the melons due to nutritional hunger.
2. Lighting
When the zucchini enters the flowering stage, if it encounters continuous cloudy or cloudy rain, the temperature difference between day and night is small, and the photosynthesis is affected. If the nutrient is consumed too much, it will be too late to manufacture, and if the nutrient is lacking, it will form a melon.
3. Planting density
The density is also one of the factors affecting the melon, the density is large, the roots compete for nutrients in the soil, while the stems and leaves in the upper part compete for space. When the leaf area index reaches 4 or more, the light transmission and permeability are reduced, and the photosynthetic efficiency is reduced. Not high, the consumption is increased, and the rate of melon is increased.
4. Pollination
Due to poor pollination or unpollination, auxin cannot be produced in the ovary, resulting in the inability of the embryo and endosperm to grow normally. In addition, vegetative growth and competing nutrients, when the supply of nutrients to the female flowers is insufficient, the auxin content of the ovary is reduced. Strong and melon.
Zucchini control measures
Adjust the temperature
Keep it at 25~30°C during the day, if it exceeds 30°C, it should be properly ventilated. Keep at 15 to 20 ° C during the night, if the temperature is too low, you can warm it through the stove.
2. Supplemental lighting
In the case of maintaining the temperature inside the shed, it is necessary to pull the grass shovel early, and if it encounters continuous cloudy or rainy weather, the illumination can be enhanced by using a light lamp or a reflective film.
3. Suitable density
The planting density should be controlled at 2000~2500 plants/667 square meters. When we use large and small row spacing planting, the large row spacing is 80cm, the small row spacing is 60cm, and the plant spacing is 40cm.
4. Hormone treatment
Two to three days after the flowering of zucchini, spraying with 100 mg/kg gibberellin or 100 mg/kg of anti-fallin can make the melon grow faster and not easy to turn the melon.
The above is the cause and prevention measures for the occurrence of zucchini melon disease. In the process of planting zucchini, there are many other diseases besides melon disease, so we must take preventive measures. I hope that the content shared by Xiaobian can help the majority of growers.
Zhejiang Industrial Group Co., Ltd. , https://www.xingyeseafood.com