Recently, the technical staff of Anhui Ping'an Garden Plant Protection Technology Institute in Anhui Province reported that there have been blows and blows on Pittosporum sinensis, and the details of the Pittosporum umbellate introduction are as follows:
Pittosporum is a genus of evergreen shrubs commonly used in greening gardens, roadsides, and gardens. Blowing cotton is one of the main pests of Pittosporum.
Hazardous characteristics: The main hazards are Pittosporum, Osmanthus fragrans, Plum, Magnolia, rose, smiling, magnolia, pomegranate, camellia, jellyfish, southern bamboo, wisteria, bergamot, peony, rose and other flowers, the host is very wide, and the harm is widespread. Female adults and larvae often concentrate on the shoots, leaves, branches, and stems to suck the sap. In severe cases, the entire shoot can be covered, resulting in yellow leaves, short shoots, deformation, deciduous, dead branches, and even the death of the whole plant, and it is easy to induce Coal pollution causes blackening of foliage, hinders photosynthesis, and affects tree vigor, thereby reducing ornamental value.
Morphological characteristics: Adults: Female adults are orange-red, brown on the back, oval, 5-7 mm long. The ventral surface is flat, with prominent protrusions on the mid-chest and on the thorax. It is surrounded by pale yellow cotton-like wax and has silver-white waxy and fibrous wax. Mature females have a silver-white, oval-shaped raised oocyst below the abdomen, usually with 14-16 vertical stripes. Male slender, about 3 mm long, black chest, forefront narrow, grayish brown, 3-4 hooks at the end of the abdomen.
Nymphs: oval, orange. There is no difference between males and females of the first age Eyes, tentacles and feet black. There are 4 long hairs at the top of the antenna and 3 pairs of long hairs at the end of the abdomen. 2 years old body covered with thin wax powder, there are 4 piles on the thoracodorsal midline, the top is yellow cotton waxy material, body hair changes more; male body is long and lively, less waxy substance, body color is more obvious ( Bright). The third instar of the female is more pronounced on the black hair on the body, and the back is covered with yellow and white wax; the male has the same accessory limbs and wing buds as the adults at the third age, and cracks in the branches or weeds and loose soil. A cottony, white pelicans, which are pupaed after being re-skinned.
The law of occurrence varies from generation to generation in each generation, and it usually takes 2-3 generations in one year. Adult females or nymphs are allowed to overwinter on branches and spawn in March of the following year. May and June are spawning seasons. From late May to late June, nymphs hatch. Adults occur from late June to mid-October. , from mid-July to early August. The second generation of adults spawned from late July to mid-August, and the mid-August was a prosperous period; nymphs occurred from mid-July to early November, and August and September were prosperous. Each swaddling once once, and herdability. Males are more lively. At the third instar, the mouthparts are degraded, that is, in the cracks of the trunk or in the nearby loose soil and weeds, white moss-like phlegm is formed. Female adults did not stop eating or hibernation. Each insect state overlaps.
Pittosporum punctatus is relatively rare, and it is usually dominated by parthenogenetic reproduction. Female adults are not in the oocysts, spawning while secreting wax, and the spawning period is approximately 25 days. Each female lays 200-600 first-generation eggs and 700-1100 seeds in the second generation. The first generation of oviposition period is 12-26 days. The second generation is about 10 days. The newly hatched nymph climbs out of the female worm's egg bundles. The action is lively, and most of the parasites are endangered on both sides of the main veins on the backs of the tender branches and leaves. After the second instar, they are mostly transferred to the branches. The first and second instar nymphs secrete a lot of honeydew when they suck sap, which is the main reason for inducing coal pollution. Adult females often become harmed after being cooked and are not transferred.
Control methods
1. Forestation measures: Remove field pests and pruning worms, and bring them out of the field for burning.
2, biological control: protection of the Australian ladybugs, large and small red ladybugs.
3, drug control: dormant spraying Popper 1-3 degrees lime sulfur; nymph incubation period can be used 40% omethoate EC 1000 times plus 10% pyridine wettable powder 1500 times; adults use mad kill 蚧 800 - 1000 times liquid or 40% speed culling EC 1500 times liquid evenly spray, adding a proper amount of diesel oil spray can increase its permeability, while requiring the liquid must be sprayed thoroughly spray. Crazy kills cockroaches on scale insect effects.
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