How to treat plant red column disease?

Plant red column disease, also known as red heart disease, brown heart disease, red heart root rot and so on, is a major disease of strawberries, so how to treat plant red column disease?

First, how to treat plant red column disease?

First of all, it is necessary to clean up the diseased plants, and then pour 58% metalaxyl manganese zinc wettable powder 500 times, 64% alum wettable powder 500 times around the healthy plant to protect it. The interval of application is about 7 days, and it can be irrigated 2-3 times continuously.

The main manifestation of the disease was that the root system first turned brown or dark brown from the apex or middle of the young root, and then the middle column became reddish brown and decayed. In severe cases, the xylem and pith of the diseased root were necrotic and browned, the whole root dried up, the aboveground leaves turned yellow or wilted, and finally the whole plant withered.

Second, how to control other diseases of strawberries?

1. Leaf spot

Leaf spot disease, also known as snake eye disease, mainly harms leaves, petioles, fruit stalks, tender stems and seeds. Small dark purple spots are formed on the leaves, which are enlarged to form near-round or oval disease spots, with purple-red-brown edges, gray-white center and slightly fine wheels, so that the whole disease spot is snake-eye-like, and small black grains are not formed on the disease spot.

The method of prevention and control is to remove the diseased and old leaves in time. The initial stage of the disease with 70% chlorothalonil wettable powder 500-700 times liquid, ten days later spray again. Or spray 75 kg of water with 70% mancozeb wettable powder, 200 grams per mu.

2. Powdery mildew

Powdery mildew is mainly harmful to leaves, but also to flowers, fruits, fruit stalks and petioles. The leaves are rolled up in the shape of a spoon. The flower buds and petals are purplish red, can not bloom or bloom completely, the fruit is not inflated, is slender, and the young fruit loses luster and hardens. Near-ripening strawberries will lose their commercial value when they are damaged.

The prevention and treatment methods are as follows: spraying Baume 0.3 degree stone sulfur mixture in and around the disease center strain. After harvest, the leaves of the whole garden were cut and sprayed with 1000 times of thiophanate methyl or 5000 times of methamphetamine and 5000 times of Teflin.