How to prevent pumpkins from turning into melons?

How to prevent pumpkins from turning into melons? Please introduce the pumpkin causes and control methods can refer to the following: (1) the main symptoms grow to a certain size of young melons stop growing, gradually yellowed and atrophied, and finally withered or shedded. (2) the cause of the disease is hypoplasia of pollen, low temperature in early spring in greenhouse and high temperature in the later stage of greenhouse, which leads to poor development of flower powder. When humidity is high, pollen is not easy to spread, female flowers can not pollinate and can not form seeds, so they can not synthesize enough IAA, which leads to melon. Improper management of fertilizer and water causes overgrowth of plants and breaks the balance between vegetative growth and reproductive growth. In this case, if artificial pollination is not timely, miss the best pollination time, easy to lead to melons. (3) ① prevention and control measures to prevent overgrowth, promote normal plant growth and development, strengthen heat preservation measures, strengthen fertilizer and water management, and prevent overgrowth caused by excessive soil moisture and nitrogen fertilizer. ② pruning at the right time, sparse melon to remove lateral branches, zucchini basic section has melons, due to competition for nutrients, it is impossible to sit, should be removed as soon as possible difficult to sit melon. ③ regulates the balance between vegetative growth and reproductive growth according to plant growth, weak plants should be harvested as early as possible; prosperous plants with more upper female flowers can be harvested early, and overgrown plants should be harvested late. For ④ treatment, pedicels can be smeared with 250mg / L 2mae 4rel D or 50mg / L antilactin (tomato spirit) and fruit sprayed with 80mg / L gibberellin per liter. ⑤ carried out artificial pollination around 9: 00:00 every morning during the flowering period. The male flowers were removed, the petals were removed, and the pollen on the anther was smeared on the female flower stigma. Click to get more pumpkin planting techniques click to get more vegetable planting techniques