Control method of white silk disease of nursery stock flowers

In cactus, three-rowed sword, impatiens, glass Cui, warbler tail, orchids, peony and other herbaceous flowers on the occurrence of white silk disease how to do?

At the beginning of the disease, a small piece of black-brown wet rot was produced on the stems and leaves at the base of the plant, and then the pinnate white mycelium spread to the soil surface. In a humid environment, the mycelium gradually turns orange or red to uncover the sclerotia of rapeseed, causing the stem to rot.

The hyphae and sclerotia of white silk disease can survive on the soil and plant residues for many years, and they are most likely to damage succulent plants and cactus flowers, as well as grass flowers with tender stems, which spread quickly on the soil surface in the environment of high temperature and high humidity. the humidity between dry soil and basin soil can inhibit the spread of pathogens. The infected soil can be irrigated and disinfected with mercury, quicklime and water according to the weight ratio of 1-15-15-1500, or 25% pentachloronitrobenzene equivalent to 0.1%-0.2% of the weight of the basin soil.

50% wettable carbendazim 500 times solution can be sprayed before and at the initial stage of the disease. If wet rot is found at the base of the trigonous sword, you should immediately remove the basin, cut off the rotten part together with some good stem meat, thoroughly dry the cut and produce a skin film, and then stand it on the moist plain sand to let it take root again; in order to prevent the trigonous sword from lodging, you can tie a Reed rod to support it.