Daejeon rose flood management points
Post-flood climate characteristics
The temperature in the shed is relatively high, and the temperature difference between day and night is larger in the central Yunnan area. After the flood, if the greenhouse has a plastic canopy with a shoulder height of 2 meters and a ceiling height of 3.50 meters, the temperature in the shed is between 28 and 42 degrees Celsius at noon. If in a plastic canopy with a shoulder height of 1.50 meters and a ceiling height of 2.50 meters, the temperature is between 35 and 48 degrees Celsius. At night, the interior temperature of the above specifications is only between 15 and 17 degrees Celsius.
In the plastic greenhouse after the heavy air humidity in the shelter, the relative humidity in the clear day is 60%-70%, and the humidity in the night is more than 80%-90%.
Rose after the flood
1. Mud covers the foliage.
2. Sprout shoots, wilting or rot on sunny days, mature branches or fallen shoots.
3. The petals are rot and the rot is doubled.
Rose Field Management after the Flood
1. Discharge the stagnant water as soon as possible, timely loosen the topsoil, remove the toxic gases produced by the roots under anaerobic respiration, reduce the root damage, and restore the normal absorption capacity of the root system.
2. Remove damaged flower branches and leaves in time. After the flood, what pressure loss, blistering, and rushing branches and leaves must be sorted out in time, and then widely used fungicides such as carbendazim, chlorothalonil, metalaxyl, etc. should be sprayed.
3. Wash the sludge on the leaves in time to restore the photosynthetic capacity of the leaves. On the leaves, KPS, carbendazim, metalaxyl, etc. are sprayed to protect the affected foliage from falling leaves or leaves.
4. Shading ventilation to reduce the physiological damage caused by high temperature and humidity during the day. Cover the roof with a shade net of 30% to 50%, and open or roll up the side membrane of the greenhouse to promote ventilation and cooling. Make greenhouse temperature below 28 degrees.
5. Early prevention of downy mildew and gray mold. After the flood, due to the increase of air humidity in the shed, the night temperature dropped to 15 degrees to 18 degrees, creating conditions for the occurrence of rose gray mold, downy mildew, resulting in large deciduous rose plants, rotten and burnt phenomenon. The main pesticides for the prevention of rose downy mildew and gray mold include Kelu, Ank manganese zinc, fast keratin, Shijiale, and Rhizoctonia.
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