Causes and control measures of low fruit setting rate of muskmelon in greenhouse

Through the cultivation of muskmelon in the greenhouse, it is considered that the regulation of temperature and humidity can significantly increase the yield of muskmelon, but if it is not managed properly, the fruit setting rate of muskmelon will be reduced, which not only affects the yield and quality of muskmelon, but also delays the time to market of muskmelon and reduces the income. So what is the reason for the low fruit setting rate in the greenhouse? Come and have a look with the editor.

1. The reason for the low fruit setting rate in greenhouse

1. Low temperature and low light

After the melon is low in spring, the temperature in some areas is changeable, or even cold in late spring, or continuous rainy days, if the heat preservation is not proper, then it will restrict the growth and development of muskmelon and affect the flowering and fruit setting. In the lack of light, it will force melon internodes, petiole elongation, poor flower bud differentiation, less accumulation of nutrients in fruit, decreased sugar content, and poor quality.

2. Excessive humidity

At low temperature, the greenhouse is not ventilated for a long time, which will lead to high air humidity and relatively saturated soil moisture, which will not only affect the absorption capacity of roots and leaf transpiration, but also make it difficult for pollen to distribute or break, and hinder fertilization. Affect the effect of pollination, resulting in falling flowers and fruits.

3. Improper fertilization

Excessive application of base fertilizer and less topdressing, especially excessive growth of plants caused by partial application of nitrogen fertilizer, will restrict plant flower bud differentiation, while too little use of organic fertilizer, or even no application of organic fertilizer, is not conducive to plant flower bud differentiation.

4. Serious diseases and insect pests

Diseases and insect pests will seriously hinder the cultivation of strong seedlings, which will affect the stress resistance of plants, and it is easy to drop flowers and fruits in the later stage.

II. Prevention and control measures

1. Suitable temperature and humidity management

Melon fruit setting period to keep the temperature at about 28-30 degrees during the day, if lower than 18 degrees or higher than 32 degrees are not conducive to pollination fruit setting, it is very easy to form deformed melons, and it is suitable to keep it at 15-18 degrees at night. Temperature management should be strengthened in protected cultivation, the temperature rises rapidly in spring, the temperature is mainly increased in the early growth stage, and attention should be paid to cooling after flowering and fruit seding. when the temperature exceeds 32 degrees, the greenhouse film should be covered with shading net to cool down properly.

2. Improve the lighting conditions.

Uncover the plastic film early and late in sunny days, prolong the lighting time, replenish light and keep warm, while in rainy days, open the film at both ends of the greenhouse or the base of the greenhouse in time to increase the scattering light source. You can also choose non-dripping film to improve lighting conditions, you can choose polyethylene, vinyl acetate and other films. It has high light transmittance and can increase the light intensity by about 25%.

3. Rational fertilization

During the period of vegetative growth to reproductive growth of muskmelon, compound fertilizer or foliar fertilizer should be applied in time, and nitrogen fertilizer should not be applied partial to promote nutrition to young melons in batches, enhance plant growth and grow vigorously at the same time. When the plant is overgrown, it should be sprayed with paclobutrazol or by lowering the bibcock to bind the vine, which can obviously inhibit the growth of stems and leaves and promote the expansion of the fruit.

4. Pest control

Muskmelon common diseases are Fusarium wilt, blight, powdery mildew, insect pests are mainly aphids, whitefly, etc., focus on the control of powdery mildew, virus diseases and aphids, comprehensive control, prevention-oriented, and timely breeding with pesticides when diseases and insect pests are found. At the same time, we should also pay attention to greenhouse ventilation, control appropriate temperature and humidity, timely vine management, vine binding and weeding, so as to improve the resistance of plants to diseases and insect pests.

The above are the reasons for the low fruit setting rate of muskmelon in the greenhouse and the introduction of control measures. I hope it can help you. If you want to know more about it, please pay attention to us.