   In summer, with the change of environmental factors such as temperature and light, the stems and leaves of loofah plants grow fast, and the roots age quickly. If they are not properly managed, they will easily cause premature senescence of plants. At this time, it is recommended that the vegetable farmers take the following measures:
Skillful fertilization water loofah likes moisture, is not resistant to drought, suitable for soil water content of 70-85 %, should be watered in time to prevent loofah plants due to drought and premature aging. The vegetable grower should pour a water after picking the heart under the conditions of suitable weather, pour a water two days after the melon, and pour a water two days before picking the melon, which can promote the growth of melon strips and plants and prevent premature aging. In the fruiting period, vegetative growth and reproductive growth are very strong, and the demand for nutrients is very large. Therefore, vegetable farmers should pay attention to timely topdressing and ensure adequate nutrient supply.
When the planting of the summer melon is reasonable, the vegetable growers generally have three or four leaves to leave a melon, but the vegetable grower must pay attention to the growth of the plant and decide to stay in accordance with the growth. On a vigorously growing tree, you can leave one or three leaves for one melon; on a weaker growing tree, you should reduce the melons appropriately, and change the leaves to five or six leaves. Otherwise, the plants will be overburdened, and the roots will be The growth and development of stems and leaves eventually lead to premature senescence of plants. It is recommended that the vegetable growers adjust at any time according to the growth of the plants, and leave the melons reasonably.
Adjust the greenhouse temperature of the loofah plant to grow at a temperature of 25-32 °C during the day and 15-20 °C during the night . The indoor temperature rises rapidly after the summer, so it is necessary to take measures to reduce the temperature of the shed in time. First of all, to strengthen ventilation, open the shed door at noon, increase the vents. Secondly, the sunshade net is set. The sunshade net mainly reduces the temperature of the shed by blocking part of the sunlight and reducing heat. Morning, afternoon light is weak, in order to improve photosynthetic efficiency, shade nets to be used before 15:00 after 11am. Again, reasonable watering reduces the ground temperature. Water evaporation will absorb a large amount of heat, and reasonable watering is also an important measure to reduce the temperature inside the shed. Vegetable farmers should make rational use.
Prevention of pests and diseases In general, loofah has strong disease resistance and less disease. However, the high temperature and high humidity environment in summer greenhouses is likely to lead to high incidence of bacterial diseases and viral diseases. Therefore, preventive measures should be strengthened in management. Bacterial diseases occur mostly after falling vines, so it should be prevented by spraying 3000 times of agricultural streptomycin before falling . For the prevention of viral diseases, the focus is on the prevention and control of poisonous pests: setting insect-proof nets to prevent the spread of poisonous insects indoors and outdoors; hanging yellow sticky insect boards, sticking insects in the shed, and observing the insects; timely medication, such as acetamiprid , imidacloprid, and the like. At the same time, it is necessary to combine the application of Ningnanmycin and mushroom protein to improve the disease resistance of the plant and prevent viral diseases.
Source: Gansu Science and Technology News Author: Fan Xiuli
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