The Forestry and Grassland Bureau of Pu'er City, Yunnan Province, released a news on the 9th that since June 28, the yellow ridge bamboo locust invasion was first found along the border between the Niuwei River Conservation Area in Jiangcheng County, Pu'er City, and Laos, until July 8, a disaster occurred, and the cumulative occurrence area of locusts was 98,872.3 mu. The bureau said that at present, the continuous invasion of the yellow ridge bamboo locust outside the country is serious, and there is a tendency to spread to surrounding counties and districts.
On June 30, the Forestry Pest Prevention and Quarantine Center of the Forestry and Grassland Bureau of Pu'er City received a telephone report from Jiangcheng County, and the monitoring found that along the border between the Niuwei River Conservation Area and Laos, there were yellow-ridged bamboo locusts constantly migrating in, showing mobile hazards, and the main targets of harm were bamboo, plantains, rice leaf reeds and other plants. After receiving the report, the bureau quickly organized personnel to go to Jiangcheng County to carry out prevention and control guidance.
As of July 8, Pu'er City has monitored a total of 98,872.3 mu of yellow ridge bamboo locust community activity area (including 80,525.6 mu of forest land and 18,346.7 mu of agricultural land). The total area of prevention and control carried out is 34,416 mu (including 24,100 mu of forest land and 10,316 mu of agricultural land); the total number of unmanned aerial vehicle flight prevention operations is 502.
At 16:00 on the 9th, the Mangan Group of Mafu Village, Wenwu Town, Mojiang County, monitored a small number of yellow-ridged bamboo locusts migrating in and out, and the specific area is being verified.
The Pu'er Forestry and Grassland Bureau said that the current disaster situation has the following development trend: First, the continuous invasion of the yellow ridge bamboo locust outside the country is serious, and new invasive populations can be monitored every day; second, the proliferation rate is accelerated and there is a tendency to spread to surrounding counties and districts; third, the invasive population has a tendency to spread to farmland, and there is a potential disaster risk to crops.
The Forestry and Grassland Bureau of Pu'er City pointed out that the preliminary research and judgment shows that the outbreak of yellow ridge bamboo locusts in the border line from July to September is likely to be a disaster.
According to the official WeChat account of the bureau, the yellow-ridged bamboo locust is an insect of the genus Bamboo locust in the family Net-winged locust family, commonly known as bamboo locust and locust. It mainly harms moso bamboo, followed by rigid bamboo, water bamboo and so on. When the bamboo locust occurs, all the bamboo leaves can be eaten, the bamboo forest is like a fire, the bamboo dies that year, the second year the moso bamboo forest rarely produces bamboo shoots, the bamboo forest gradually decays, the victims of the moso bamboo die, the bamboo cavity is water, the fiber is corrupt, and the bamboo has no use value. The yellow-ridged bamboo locust is the main pest in China's bamboo-producing areas and is often harmed on a large scale. One generation occurs each year, and the eggs overwinter, and the overwintering eggs begin to hatch in early May, and the incubation is peak in mid-to-late May, and the incubation is completed at the end of June.
<h1 class= "pgc-h-arrow-right" > yellow-ridged bamboo locust</h1>
Yellow ridge bamboo locust (Ceracris kiangsu Tsai), also known as bamboo locust, locust, mussel standard, flying locust, running dead seed, flower mussel label, flower chicken, mussel chicken, is the main pest of bamboo producing areas in China, distributed in Anhui, south of Jiangsu, like to eat moso bamboo leaves, but also eat corn, rice and other 5 families of 20 species of plants.
Adult insects eat leaves, eat leaves into a lack of moments, when the big occurrence, the bamboo leaves are eaten, as if the fire, the new bamboo is killed, the old bamboo is killed within 2-3 years after the new shoots, the bamboo stalks of the victimized bamboo are often waterlogged and cannot be used.
Morphological characteristics
Adult: The body is mainly green and yellow, the forehead protrudes so that the frontal surface is triangular, and there is a yellow longitudinal stripe from the forehead top to the center of the dorsal plate of the front chest, and the more backward it is, the wider it is. The antennae are filamentous, the compound eyes are ovoid, and dark black. The hind leg segments are yellow-green with a neatly arranged "human" glyph in the middle; the tibial segments are blue-black with two rows of spines.
Eggs: Oblong-oval, slightly pointed at the upper end and slightly curved in the middle. It is 6–8 mm long in diameter, brownish yellow, and has nest-like reticulations. The oocysts are cylindrical, 18–30 mm long, earthy brown.
Nymphs: The nymphs of locusts are called flyworms and are 5 years old. The 5-year-old salamander is emerald green, and the posterior margin of the dorsal plate of the anterior thorax covers most of the posterior thorax.
Regularity of occurrence
1 year 1 generation. Overwinters in the soil with eggs in the soil. Incubation began in early May in Hunan and late May in Zhejiang, with an incubation period of up to 50 days. Nymph stage 50-55 days. Feathering begins in early July, tailing begins in mid- and late-July, and spawning begins in early August. Spawning is extended to the end of October and the beginning of November. When the average temperature on May is above 25 °C, the eggs begin to hatch, and the relative humidity conducive to hatching is 60%-80%. Incubation is more often sunny from 14-16 o'clock. The hatching nymphs do not eat on the same day, and concentrate on small bamboo and grass weeds, and eat bamboo leaves and weeds the next day, so that the leaf edges show many missing marks. Feeding is mostly carried out at 6-9 o'clock and 16-20 o'clock. At the end of the 1st and 2nd year old, they began to go to the big bamboo to be harmed, and the 3rd year old all went to the big bamboo.
Jumpers have a strong positive nature, and the upper bamboo jumpers are mostly concentrated in the upper part of the bamboo shoots for feeding, and the bamboo shoots are eaten into a piece of dry yellow. After 3 years of age, the fleas gradually disperse. Fleas have a group migration habit, which is more obvious at 4 and 5 years old. When the noon temperature is above 30 ° C, the jumping flies have the habit of cooling down and drinking water, and the temperature drops and returns to the bamboo for feeding. The molting stops eating 1 day before molting, and it is not active, the molt is concentrated at about 9 o'clock, it takes half an hour, and it can be eaten on the second day after molting. For each increase in the number of fables, the average leaf feeding volume increases by 1 times, with the 5th instar eating the largest amount of leaves, accounting for about 50% of the leaf consumption at the nymph stage. Migrations mostly occur on sunny or hot days. In addition to meteorological factors, Qianfei also searches for food and suitable spawning sites, and the distance of migration is more than 10 km. After feathering, the adults mature sexually, and the adults eat the most at this stage. Adult tails are mostly during the day, mostly at 5-7 o'clock and 17-21 o'clock. Both male and female adults can have multiple tails. Female adults begin laying eggs after half a month of supplementation. Before laying eggs, adults fly to bamboo forests with their backs to the sun to the north, and choose to lay eggs on the mountainside or forest open spaces or in the open spaces on the slopes of ravines where firewood and grass are scarce, the terrain is high and dry, the drainage is good, the soil is deep and the soil is loose. The starting temperature of nymph development is 10.65 °C, and the accumulated temperature of the nymph stage is 786.58 °C. Fleas like to eat substances that smell of urine and salt.
Adult feathering is mostly during the day, with 8-10 o'clock most. The first feathered adult, the sexual organs are not fully mature, and nutritional supplementation is required. Before the sexual organs mature, adults have a group of people who love to fly, and there are also migratory phenomena. Each female can lay 1-10 egg sacs in her lifetime, and each egg sac has 15-30 eggs. The complete exposure of the egg cap on the egg sac at the spawning site due to rain erosion is a sign of the investigation of the spawning place.
There are many natural enemies of yellow-ridged bamboo locusts, including small noisy birds, thrushes, swallows, bamboo chickens, red-billed blue finches, magpies, etc.; in addition, red-headed coriander larvae prey on locust eggs, step beetles, insectivorous bugs, insectivorous flies, ants prey on fleas, mantises, wasps prey on adults and fleas; as well as black egg bees parasitize locust eggs, small parasitic flies parasitize flies, and parasitize flies. There is also a parasitic fungus that holds grass plague, parasitic bamboo locusts cling to bamboo and die.
Prevention and control methods
(1) Agricultural control.
Scientific fertilization, application of fully decomposed farm manure, reasonable cutting, maintaining appropriate density, improve plant disease resistance; timely ploughing of eggs, digging out egg blocks and placing them in sarongs so that egg parasitic bees can fly out; you can also catch jumpers on small bamboo, weeds or shrubs in the early morning when the dew is not dry before most of the fleas are unearthed but not on the big bamboo.
(2) Protection and utilization of natural enemies.
There are many kinds of yellow ridge bamboo locusts in the world, and it is necessary to make rational use of them and pay attention to protection.
(3) Pharmaceutical prevention and control.
Strengthen monitoring, control of hatching nymphs, can use 2.5% cypermethrin emulsion 8000 times liquid, or 50% methamidophos emulsion, 50% dichlorvos emulsion 3000 times liquid, or 90% dichlorvos 2000 times liquid, spray, the effect is good; if the adult worms have been on the bamboo, only aerosol fumigation. Anyang Lin Pharmaceutical Factory produces tobacco agents such as bamboo locusts, and the effect is still good.
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