Prevention and treatment of Root Rot of hydroponic Flowers in Family
The static hydroponic flowers commonly introduced in the market, according to the way of supplying oxygen to the roots, one is to use the dissolved oxygen in the nutrient solution, and the other is to receive oxygen directly from the air. The former is that the root tip is immersed in the nutrient solution and naturally dissolves oxygen through the contact between the liquid surface and the air; the latter is the upper end of the root system, that is, local roots are exposed to the air to directly inhale oxygen.
When the flower root system is exposed to the air, the root system is directly in an environment where the oxygen concentration is 2.3 × 100000ppm (the volume percentage of oxygen in the air is about 21%). When the flower root tip is planted in water, the oxygen concentration in the rhizosphere decreases sharply and is affected by the saturated dissolved amount of oxygen in the water (
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Prevention and control of black spot of rose
Rose black spot, also known as brown spot, is a worldwide rose disease. Symptomatic rose leaves, twigs and pedicels can all be damaged. The disease spot on the leaf is purple-brown to brown at first, and then expands into a round spot 1.5-13 mm in diameter, black or dark brown, the edge is ciliate, but the upper edge of some varieties can also be neat and smooth.
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Botrytis cinerea of Phalaenopsis and its control measures
Orchid gray mold, also known as orchid rot. Flower beds occur from time to time in the south and north of China, which endanger not only the orchids of Orchidaceae, but also Phalaenopsis, Cartland, Dendrobium, Magnolia, Crane and other flower plants. Among them, horticultural treasures such as Phalaenopsis, Cymbidium and Cymbidium suffer more seriously. Symptom
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