Most of the root rot is caused by the invasion of the wound by the pathogen and improper planting management, excessive watering and fertilization, too wet basin soil and suffocation of the root system.
Often loosen the soil, so that the roots of the city can breathe at night. Do not water too much to avoid ponding, which may lead to poor breathing at the root. Pay attention to the frequency of fertilization. It is not suitable to apply fertilizer in the summer to avoid rotten roots.
In case of root rot, the original plant should be dug up in time, the rotten roots should be cut off, soaked in 5000 times of potassium permanganate for one hour, and then replanted with new soil.
The environment with high temperature and humidity is easy to cause anthrax and grey mould. It will reduce the ornamental value of the night city and may cause plant necrosis in severe cases.
Summer high temperature and rainy, pay attention to rain, do not over water.
It was found that the Anthracnose and gray mold could be sprayed with 70% methyltobujin wettable powder or 50% carbendazim wettable powder 500-600 times.
Scale insects are very annoying pests with hard shells. It does a lot of harm to sleepless city.
Keep the habit of checking for pests.
In one to three days, the scale insect belongs to the first age stage. At this time, buy medicine to spray, kill it directly in the cradle, do not let it have the opportunity to do evil, and the effect is the best.
Aphid is a common disease of potted landscape in family culture. The aphid is small. It is a reproduction period from March to October every year. The young leaves of clusters and plants suck leaf juice, which endangers the health of plants.
Aphids can not be removed by hand like ordinary pests, so they often need some chemicals or physical treatment methods.
In the early stage of aphid occurrence, the aphid was controlled artificially and brushed off with brush and brush.
Use 50g fresh pepper or dry red pepper, add 30-50g water, cook for about half an hour, and spray the filtrate to the city at night.
Chemical control.
