Culture methods and key points of four seasons management of family potted mulberry flowers

Hibiscus stem rot is a serious fungal disease which occurs widely day by day. The disease mostly occurs in the rainy season and is serious in high temperature and rainy conditions. Most of the pathogens were infected from the root-stem junction of the plant, and the initial symptom was not very obvious, but the cortex of the damaged part shrunk slightly dark brown, but the subcutaneous tissue began to rot and turned brown. After a week of disease spot around the stem, the plant withered and died. From the foliar point of view, at the initial stage of the disease, the leaves wilted, the edge appeared yellow-brown spots, gradually expanded to the inside, and the leaves dried up and fell off in the later stage. The key to the prevention and control of the disease is to prevent the plant from being washed by rainstorm for a long time, and to dry it with 200-500 times liquid topiramate every 10 days before and after the rainy season. The experiment shows that this method has a good control effect.

Root knot nematode disease

Hibiscus root-knot nematode is also a widely distributed and serious disease. Observed from the aboveground part of the disease, the growth of the leaves was weak at the initial stage, and reddish-brown spots appeared on the edge. And expanded inward, and the leaves dried up and fell off in the later stage. From the underground part, it was found that there were tumors of large and small between the roots of the plant, smooth flesh color in the initial stage, rough brown in the later stage, and pear-shaped female nematodes in the size of needle tips. The prevention and treatment of the disease is difficult. If the number of plants is small, the soil must be exposed to the sun for a long time, and the old soil should not be used again. More plants can also be applied aldicarb granules, according to the 5-inch pot buried in about 0.5 grams plan.