Q: How does a scale insect occur in Camellia? Answer: The common scale insects on camellia mainly include red wax medium, blown cotton medium, sorghum shield medium and brown tea. Red wax female female adult shell wax is thick, first rose red, purple later, diameter 3 mm to 4 mm, top umbilicus, peripheral petals, with four white lines. One generation occurs in one year, generally from mid-May to mid-June to the peak period of a large number of shoots damaged by young children. Blowing cotton female adult red orange, oval, 5 mm to 7 mm long, the back of the uplift, the whole dense black hair, and was white waxy material. White silk cotton wax was secreted during spawning, white waxy oocysts were attached to the abdomen, and there were 14 to 16 ridges on the bladder. It occurs from 2nd to 4th generation each year, and each insect can live winter. From April to June, it was the most serious. Scorpion Shield female female shell is 1.5 mm to 2 mm long, gray or gray, the shell edge is yellow or brown, because of its shape, color resembles oyster shell and named. The male shell is long and narrow, with two sides nearly parallel, about 1.2 mm long and grayish white. Two generations to three generations a year, nymphs occur in mid-May, mid-July, late August and late September. The tea is brown and circular. The female shell is round in shape and has a diameter of 1 mm to 2 mm. It is purple brown or dark brown. It is waxy and thick. The center is uplifted, and the circumference is slightly slanted toward the edge. The shell is slightly like a round brim, with two shell points. Located in the center of the shell, golden or red brown. The male shell is oblong or ovate, with a shell point near the end. The worm is mostly wintered with second-instar nymphs. Scale insects usually cluster on twigs and leaves. Most of them are parasitized on the back of the leaf. They use their special thorny sucking mouthparts to suck the sap in the stems and leaves of the camellia, causing yellow leaves of the camellia leaves and the leaves to fall early. Even the whole plant died. Its excrement is rich in sugar, which often induces serious coal pollution, which causes plant growth or death. The worm is most likely to develop and spread when it is exposed to high temperatures, high humidity, and poor ventilation. Control methods 1 When a scale insect is found on individual shoots or leaves, it can be brushed gently with a soft brush, or it can be glued with a transparent tape. 2 Kill wintering nymphs with 0.5-degree lime sulfur or turpentine mixture in winter. 3Catch the eggs to hatch at the flooding stage, the best time of the spring incubating period, when the shell surface has not yet formed the shell, the use of chemicals easier to kill; can spray 40% of omethoate EC 1000 times, 2.5% Deltamethrin EC 2500 times, 80% dichlorvos EC 1000 times, insecticidal effect are good. 5 When the shell is formed, it can be sprayed with 40% speed culling EC 1500 times, because of its strong permeability, the control effect is also very good; or in the early stage of scale insects, with 25% of buprofezin (mainly containing thiazine Ketone) Wettable powder 1500 times to 2000 times spray, depending on the situation of insects sprayed again 15 days, the effect is still good. PE Coated Spunlace,PE Coated Spunlace Nonwoven,Spunlace Nonwoven Fabric,Absorbent Water Spunlace XINLE HUABAO MEDICAL PRODUCTS CO.,LTD. , https://www.golbaltravel.com