Introduction to the methods of prevention and treatment of Kang's powder scale disease of Ligustrum lucidum

Ligustrum aurantifolium is an indispensable color-colored leaf plant in urban landscaping, and Mealybug koningii disease is a common disease. The following is an introduction to the prevention and treatment of Mealybug koningii disease in Ligustrum aurantifolium for reference.

1. The disease of Ligustrum chinense mealybug

Also known as mulberry mealybug. At present, there is a large area of occurrence on Ligustrum lucidum in Urban area road isolation zone and small area, and the symptoms are often mistaken for leaf dryness caused by exposure and water shortage. Careful observation can find white floc production. Relevant units should pay enough attention to prevention and control.

It has three generations a year. The first generation of nymph occurs in the middle and late May, the second generation in the middle and late July, and the third generation in the late August to early September. Sucking plant sap, causing branches and leaves to lose water wilting, serious when the whole plant withered. It can also induce coal pollution.

II. Prevention and Treatment of Mealybug Disease in Ligustrum lucidum

1. Preventive measures

During the growth period, try not to prune as much as possible. If it is necessary to prune it in order to be neat and consistent. After pruning, spray protective fungicides such as 1500 times mancozeb or 1000 times carbendazim every 5 to 7 days for 3 to 4 consecutive times. At ordinary times, we should strengthen management, pay attention to ventilation, apply fertilizer reasonably, water scientifically, and enhance tree vigor and disease resistance.

2. Treatment

Prune diseased branches, clean up and burn them in time. spray 1000 times solution of scale kill or 1000 -1500 times solution of kuangji or 1000 - 1500 times solution of quick kill once every 5 - 7 days for 2 - 3 times continuously, and all that scale can be eradicated. When spraying, pay attention to spraying the whole plant (including diseased plants and healthy plants), evenly apply the front and back of the leaves, and the effect is better.

3. Daily maintenance points of golden leaf privet

1. Strengthen cultivation management and apply organic fertilizer. Nitrogen and phosphorus fertilizer combined use, so that seedlings grow vigorously, enhance its ability to resist stress. Avoid partial application of available nitrogen, causing excessive growth of seedlings.

2. Clean up the planting land and block the source of germs. After each pruning, the cut leaves and branches shall be cleaned out of the planting land in time, weeds shall be removed at any time, and the planting land shall always be kept clean and free of sundries. Reduce overwintering mycelium and block the source of germs.

3, timely pruning, timely treatment of wounds. In rainy season, less or no pruning should be done to reduce wounds and reduce the possibility of bacterial invasion. No matter when pruning, spray fungicide protection immediately after pruning.