How to cure evergreen disease hoarfrost

Evergreen is distributed in China and Japan, flowering from May to June and fruiting from September to November. It has the effect of clearing heat and detoxification, dispelling blood stasis and relieving pain. If encounter evergreen disease white frost how to treat it?

First, how to treat evergreen disease and white frost?

If evergreen appears white frost should be infected with downy mildew, which is a fungal disease. First of all, shave off the location of the lesion, then spray the potion, water less, and put it in a ventilated and sunlit place.

II. Disease control of evergreen

1. Leaf spot disease

The disease occurs on the leaves of evergreen, and it is easy to occur in high humidity weather. The disease spot is straight brown spot at first, the periphery is water-immersed fade green, and shows wheel-like expansion, round to oval, the edge of brown inside gray-white. In the later stage, black-brown mildew spots appeared in the center of the lesion, and turned into a dark-brown mildew layer under wet conditions. The way to prevent and cure the disease is to remove the residual leaves in time; 0.5% of Bordeaux solution (or 50% carbendazim 1000 times) can be sprayed in the early or later stages of the disease.

two。 Anthrax

The disease also occurs on the leaves of evergreen and can spread to the petiole in severe cases. In the initial stage, the plaque showed a flooded small macula, and after expansion, it was oval to irregular brown or yellowish brown, slightly rimmed, and in the later stage, the plaque became dry and produced small black spots arranged in wheel patterns. The main reason for this disease is poor ventilation, and it is beneficial to the occurrence of the disease when it is harmed by shell insects. The way to prevent and cure the disease is to strengthen maintenance, 0.3% color 0.5% equal volume Bordeaux solution (or 60% Dysen zinc plus phosphorus and potassium fertilizer; the initial stage of the disease can be sprayed with 800,900 times, or 70% topiramate, 1500 times).

3. Brown soft scale

This insect has complex feeding habits and can harm many plants, among which evergreen is one of the injured flowers. When brown soft scale harms plants, it is generally clustered on the leaves or tender leaves, sucking plant sap and excreting mucus at the same time. Its excretion can easily cause a large number of coal fouling bacteria to multiply, blacken stems and leaves, affect plant photosynthesis, and cause weak growth potential. Leaves withered and yellow, hindering viewing. When the occurrence is serious, the branches and stems are covered with insect bodies, resulting in the withering and yellowing of the plant and affecting the growth.

Evergreen is usually placed in the living room or bedroom to play a decorative and ornamental role, it also has the indoor air to absorb indoor toxic gas waste gas, release oxygen, play a purification role, especially for the elderly with weak immunity.