1, scale insects: when there are few scale insects, you can scrape them off directly or pick them off with a toothpick; When there are many scale insects, 45% malathion EC 1000 times solution and 40% dimethoate 0. 1% solution can be sprayed circularly to kill them.

2. Aphids: When aphids are found, they can be sprayed with dichlorvos 1200 times water solution or killed with tobacco leaf water: 50 grams of tobacco leaves and 5 kilograms of water are boiled.

3. Leaf spot disease: At the early stage of the disease, you can apply Dakening cream ointment on the diseased leaves of bougainvillea and cut off more diseased branches. When the condition is serious, 50% carbendazim wet powder can be sprayed 500 times, once every 7- 10 day and continuously for 3-4 times, and the effect is very good.

Extended data:

cultivate

I like water, but I want to avoid stagnant water. After planting or changing pots every year, I water it 1 time. In the peak season, I spray water 1 time every morning and water 1 time in the afternoon (after 4 pm). In spring and autumn, I can water 65,438+0 times every two days as appropriate, and I can control indoor watering in winter to let the plants fully sleep.

The amount of fertilizer applied varies with the seasons. Stop fertilizing in winter.

Apply sufficient base fertilizer when planting or changing pots in spring. After the potted plants leave the house, they should be applied with decomposed cake fertilizer or hoof water 3-4 times a month, and phosphorus and potassium fertilizer several times before flowering. Reduce the amount of fertilization in autumn. When the growth is vigorous in summer, 1 time fertilizer and water can be applied every week.