How to treat the disease of Houttuynia cordata Thunb

Houttuynia cordata, also known as Houttuynia cordata root, is a kind of plant that smells fishy and spicy and tastes crisp and tender. It is eaten in a variety of ways, and it is planted in many areas, but during the period of planting Houttuynia cordata Thunb, there will be a variety of diseases. How to treat the disease of Houttuynia cordata Thunb?

1. White silk disease

Damage symptoms: the main harm to the rhizome of Houttuynia cordata near the ground, the surface of the disease produced a large number of silky white mycelium.

Control methods: 6000-fold solution of 40% Fuxing EC, 43% 1000-fold suspension of carbendazim, 1000-fold suspension of 45% Tekedo, 8000-fold solution of 10% Shijiaogao dispersible granule and 50% carbendazim wettable powder were sprayed on the rhizome of diseased plants and adjacent plants and soil.

2. Leaf spot

Damage symptoms: in the early stage of the disease, irregular or round disease spots appear on the leaf surface, the edges are purplish red, the middle is grayish white, and the upper light gray mold. When the disease is severe in the later stage, several disease spots are fused together, the center of the disease spot is sometimes perforated, and the leaves die locally or completely.

Prevention and treatment: at the initial stage of the disease, spray with 50% methyl topiramate 800-1000 times or 70% mancozeb 400-600 times, once every 15 days, 2-3 times continuously.

3. Stem rot

Damage symptoms: stem disease spot long oval or fusiform, slightly watery, brown to dark brown, the edge is dark, there are obvious wheel patterns, upper small black spots. In the later stage of the disease, the stem rotted and died.

Prevention and treatment methods: in the early stage of the disease, choose 50% carbendazim wettable powder or 65% Dysen zinc wettable powder 500-600 times liquid spray, 70% methyl topiramate wettable powder 800 times liquid spray, spray once every 7 days, 2-3 times continuously.