What are the common pests of magnolia? How to prevent and cure?

Clivia common insect pests are scale insects, pest occurs, scale insects often gather in the tender shoots of leaves, absorb leaf sap, secrete a large number of bacteria, so that the stems and leaves become black mold, causing soot disease, and so that leaves wither. This insect has strong reproductive ability and can occur for many generations a year. A female adult can often reproduce hundreds of them. If no control measures are taken in time, it can cause death.

Prevention methods: prevention should be the main. Usually, we should pay attention to the plant, find pests, and eliminate them as soon as possible to prevent spread. In addition to the treatment of scale insects can be artificial, drugs at the same time with both. If only one or two leaves are found, they can be manually scraped, sharpened with thin sticks or picked off with bamboo skewers. If a large number of nymph appear, can be sprayed with 25% dimethyl imine emulsion 1000 times solution, can also be sprayed with 40% omethoate emulsion plus 1000-1500 times water solution. It can be killed by spraying 1-2 times.

In addition, it should also be noted that earthworms can also become pests of Clivia. In the young stage of Clivia plants, its fleshy roots are very tender and weak. If there are earthworms in the pot soil, it will often drill everywhere, so that the tender roots are injured, destroying the function of Clivia to absorb nutrients, and stopping the growth and development of plants or causing rotten roots. Control method is: always pay attention to the basin soil surface has no round soil particles (namely earthworm excrement), if found, can immediately use 50% dichlorvos emulsion plus 1500-2000 times water solution irrigation. After watering, earthworms drill and move, and immediately remove them; after a week, the earthworms can be removed by doing the same again.