Existing Problems and Countermeasures of Greenhouse Cucumber

At present, with the increase of temperature, the greenhouse cucumber in our county has generally entered a vigorous growth period. Through investigation, we found that the following problems existed in the cucumber shed: 1. Individual sheds and quails did not enter normal growth status. 2. Downy mildew and gray mold occur severely in the shed. 3. Blast disease and root knot nematode disease caused serious mortalities in individual sheds. 4. Mismanagement of fertilizer and water. In response to these situations, the current situation should be mainly focused on: 1. For sheds that have not yet been sloppy: cultivating new roots by cultivating and applying humic acid fertilizers; increasing night temperatures appropriately; removing large melons and putting melons in small amounts Pick off; use rooting fluid or Baba'an irrigation roots, once every 7 to 10 days, even irrigation 2 to 3 times; with plant essence half sugar 1 two full-house spray. 2. Pay close attention to disease prevention and control: In the investigation, it was found that with the increase of temperature and the increase of watering times, downy mildew has a rapid onset, and 7 to 8 functional leaf blades are located below the leading point. Yellow and dry, seriously affect the yield of cucumber. The method of prevention and control by spraying smoke first can be adopted. Before the spraying, Phytophthora cleansing agent or 45% chlorothalonil smoke agent can be used for fumigation, and then sprayed in the whole shed, such as frostbite, white rot, or frostbite, etc. Spray every 4 to 6 days. In addition, due to the dramatic changes in temperature, the incidence of gray mold is also very serious, you can choose to use fast to mold, mold grams and other spray. 3. Treatment of dead cockroaches: Dead cockroaches caused by the disease or root-knot nematode disease should be promptly removed to the outside of the shed for centralized destruction, and at the same time, white ash should be disinfected. Use beans or other seasonal crops at a larger point in the air. For those cultivars that do not have morbidity or lesser incidence of bacterial blight, neomycin can be used to spread vines or roots. For root-knot nematode disease, 1.8% schizophyllin can be used to irrigate roots or flush Kleinland mulberry bioactive fertilizer. 4. Strengthen fertilizer and water management: As the temperature rises, some vegetable farmers increase the frequency of watering and increase the amount of fertilizer. At the same time, the application of diammonium and three-element compound fertilizers began. In this regard, farmers are reminded that diammonium or compound fertilizers should be avoided if they are not slow or have just entered normal growth, so as to avoid causing fertilizer damage. Potassium Po, new vitality, strong root potassium, etc.) is the main; for the already grown into the normal growth of Gualou, do not blindly apply diammonium and compound fertilizer, depending on the situation and other fertilizers alternately. Wulai County Vegetable and Vegetable Technology Extension Station (053400)

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