What disease is there white powder like eggs on the path of osmanthus?

There is egg-like white powder on the path of osmanthus fragrans, which is a scale insect: a small insect that sucks juice, which is very special.

(1) The body surface is covered with waxy hard shell or white powder, which is inactive and difficult for drugs to reach;

(2) Sucking juice makes the growth weak or even die, and secreting honey dew makes the trees dirty and affects the landscape;

③ Sexual preference is for dark and humid environment, and trees with dense growth and poor pruning are prone to occur;

(4) The worm is small, and it will spread if you are not careful. Once introduced, it is difficult to completely remove;

⑤ There are many hosts, such as 100 species of garden plants, fruit trees and flowers in China.

The common species in this area are tortoise scale insects, red scale insects, arrow scale insects, brown scale insects, fly scale insects, peach scale insects and pine scale insects. Gardenia, Euonymus japonicus, Ligustrum lucidum, Osmanthus fragrans, Cinnamomum camphora, Du Ying and Lagerstroemia indica are very easy to appear. One of the characteristics of this insect is that the newly hatched larvae can crawl without shells and spread out on the branches like white powder. When they find a suitable place, they suck out the juice, then they are fixed and secrete wax to cover a shell, so the first year is the best control period.

Control method: 1, combined with pruning and cutting insect branches, at the same time increasing light and reducing humidity among bushes.

2. Apply pesticides at the early stage of larvae. The pesticide can be imidacloprid, pyrethroid, dichlorvos, acephate, etc.

1.9 Red spider, also known as Tetranychus urticae, is commonly found in camphor tree, cherry blossom, rose, clover, oleander, citrus, hibiscus, Parthenocissus tricuspidata and other plants. The insect likes high temperature and dry climate, and July, August and September are the peak of damage and the key period of control. Mites have no wings and spread by crawling or rotating. Generally from bottom to top, from old leaves to new leaves, from edge to center. Concentrate on the leaf backstab to absorb juice, the front of the leaf turns gray, and finally turns red and withers.

Pesticides such as acaricide, dichlorvos and fenpropathrin can be used for control.