How to prevent melons from the greenhouse?
Squash gourd is a more difficult problem in production. The melon refers to the tip of the young fruit of the zucchini growing green and yellow, becoming thin and soft, the fruit not swelling or swelling, the surface losing luster, the apex shrinking, the commodity can not be formed melon, and eventually it rots or falls off. There was no obvious symptom in the early stages of the disease, and it was found that the victim was irretrievable. Therefore, prevention should be strengthened in production.
Pumpkin melon is a kind of physiological disease, and its cause is complex: the high temperature, drought or low temperature and high humidity in the greenhouse lead to the weakening of the absorption capacity of the root system, especially the absorption of certain trace elements by the root system is hindered. Such as boron, magnesium, molybdenum, etc., to reduce the photosynthesis of plants, the imbalance in the distribution of nutrients in the body; lack of base fertilizer caused by defermentation. Taking the following hunting in production can effectively control the occurrence of melon.
First, strict control of temperature and humidity in the greenhouse, summer watering of the zucchini should generally be selected in the morning of the sunny day, to the small water pouring, to avoid flood irrigation. Three days before each melon harvest, one little water should be poured. After watering, under the premise of daytime temperature control at 25-28°C, the humidity of the air is increased to keep the relative humidity in the shed at 70%-80%.
Second, to strengthen light transmission measures during the fruitful period, should be early every morning to cover late cover grass to maintain adequate lighting time, in rain and snow and even the weather, in addition to the need to take appropriate measures to increase temperature, it should also be uncovered as usual In order to make full use of scattered light, maintain a certain photosynthesis of the plant.
Third, topdressing quick-acting fertilizers During the period of squashing and later stages, combined with watering, 200 kg of decomposed organic fertilizer or 15 kg of available monopotassium dihydrogen phosphate is applied per acre, and sprayed once every 7-10 days. High-efficiency concentrated foliar fertilizer with multiple elements. This will not only effectively prevent the melons but also significantly increase the yield.
Fourth, the application of hormone stimulation at 7-9 am every day, using gibberellic acid to open the female stigma and stalk opened on the same day, can effectively stimulate the rapid expansion of squash, induce nutrient supply, prevent chew, but also guarantee the melon Evenly. V. Spraying rare earth compound fertilizer After each melon harvesting, spray 1500 times of amino acid rare-earth compound fertilizer and adjust the nutrient distribution of the zucchini plant, which has the dual effect of increasing production and preventing melon.
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