1. Symptoms: after the disease, the stem base to the root of the plant will rot, turn black brown, and the young leaves will lose their vitality and become withered.
2. Prevention and control method: after the disease, it needs to be taken out of the basin, removed from the rotten part, dried and replanted. Then, 50% of the wettable powder was used for 2-3 times. If the Pythium is active, it can be treated with pulik, tujunling, yishuangling and other drugs.
1. Symptoms: at the early stage of the disease, the leaves of the plants will appear dark brown or dark brown spots, and black powder can be seen on the long-term spots.
2. Control methods: strengthen the maintenance management, water and apply fertilizer in time to increase the disease resistance of plants. The diseased leaves should be removed and destroyed in time, and then 70% chlorothalonil 800 solution should be sprayed for treatment.
1. Symptoms: the adults and larva will gather on the stems and leaves, absorb the juice in the leaves, and stop the growth due to the lack of nutrition and water.
2. Control methods: the scale insects began to move at 7 ℃ in spring. When the plant is infested with insects, the cotton ball can be soaked in vinegar, and the damaged stems and leaves can be wiped. It can also be sprayed with diluted Omethoate or dichlorvos solution for 3-4 times in a row.
