Brief introduction of Chilo suppressalis

Hemiplegia bicolor is a kind of moth, Hemiplegia subfamily. It is known that it occurs in the low mountains and plains of Japan in May-June and August-September, causing damage to the flowers and fruits of mice and millet. Harmful jasmine, commonly known as jasmine bud moth, was found in China. The masses are called moths. Habit: Overwintering with larvae on jasmine branches and flowers. At the end of February and the beginning of March, the pupa stage is warm, and it emerges in spring. Adults lay eggs on buds or tender leaves. After hatching, the larvae burrow into the flowers and eat them. When there are no flowers, they damage the leaves between leaflets, which can be transferred and damaged. Larvae can also destroy shoots, which occurs for more than ten generations every year. It was observed that the insect infected Jasmine in the whole flowering period, with overlapping generations, and the infection peak was from June to September.

Control method of jasmine double-striped corn borer

Because this insect mainly harms flowers, and jasmine is the raw material for scenting scented tea, the safety requirements are particularly high. In terms of prevention and control, we should first pay attention to not using highly toxic and residual pesticides during flowering, avoid using drugs as much as possible during flowering, and control the population density through prevention and control before and after flowering. Specific practice: sweep the countryside in winter, cut off all dead branches, moth-eaten branches and insect branches, and burn them centrally. Sweep leaves, burn or bury them. Check the fields with many overwintering insects, and reduce the source base of overwintering insects in combination with pesticide application. Pay attention to check the flowering period, and all damaged buds, flowers and branches should be removed in time. Smoking in the flower field at dusk can prevent adults from laying eggs. Chemical control. 24.5% chlorfenapyr 2000 times solution or 1.8% chlorfenapyr 2000 times solution, or 800- 1000 times solution of sanle pesticide, or other avermectins, such as 0.9% ethiprole 2000-3000 times solution and 1% chlorfenapyr 25000 times solution.

Second, the jasmine leaf moth.

Brief introduction of jasmine leaf moth

Jasmine leaf borer belongs to Lepidoptera, a kind of stem borer. Larvae mainly feed on jasmine leaves, sometimes destroying buds and shoots. The newly hatched larvae cluster on the back of leaves and feed on mesophyll, leaving a translucent epidermis. When they grow up, the leaves are eaten into holes or dents. It can also bite the bark of a twig, making the leaves turn yellow and fall off, and the whole twig will die. Habit: It occurs once a year in the south 10 generation and overwinters as larvae. Adults appear in March-April, stay still during the day, move at night, mate and lay eggs. Eggs are mostly laid on leaves, but also on the back and shoots of leaves. Eggs lay eggs in scales, and each female fish can lay 50-200 eggs. Larvae gather and spread for the first time after the third instar, and often tie branches and leaves together to hide and feed on them. This kind of harm is more serious in autumn

Control methods of jasmine leaf borer

1. Clear the garden in early spring, sweep the dead leaves and burn them to eliminate the overwintering insect source. 2. Biological control. Including protecting natural enemies, spawning parasitic bees and using biological insecticide Bacillus thuringiensis. 3. Chemical control. When the enemy can't control its harm, 90% trichlorfon 600-800 times dilution, 50% fenpropathrin EC 1000 times dilution, 2.5% deltamethrin 1500-2000 times dilution, 20% fenpropathrin 2000-3000 times dilution or 24. Note that spraying should be carried out after picking flowers, and pyrethroid pesticides can only be picked more than 5 days after application.

Three. prodenia litura

Brief introduction of Spodoptera litura

Spodoptera litura belongs to Lepidoptera, Noctuidae, also known as Spodoptera litura and Spodoptera litura. Spodoptera litura is a worldwide pest, mainly distributed in tropical and subtropical regions of Asia, as well as Mediterranean regions of Europe and Africa. It is distributed all over China. This insect is an omnivorous, gluttonous leaf-eating pest, which often erupts intermittently. There are more than 200 known harmful plants, belonging to 99 families, with at least 99 favorite plants. Among the crops planted, jasmine, cotton, tobacco, sweet potato, peanut, soybean, corn, wheat, beet, taro, lotus root, sesame, sunflower, melon and cruciferous vegetables are the main victims. Larvae mainly feed on leaves, flowers, fruits and shoots. This insect occurs more frequently in warm areas south of Huaihe River in China, with more populations in the middle and lower reaches of Yangtze River and South China, and occasionally in the north. happen

The optimum growth temperature is 25~30℃, and the optimum relative humidity is 75%~80%. In fields with good water and fertilizer conditions and dense growth, the population density of insects is generally high. 20% soil moisture is beneficial to pupation of larvae and emergence of adults. If the newly hatched larvae are washed away by heavy rain, a large number of them will die, and the water will stay in the field for a long time, which is not conducive to the survival of pupae. The temperature and humidity conditions in Guangxi are most suitable for the growth and development of Spodoptera litura. If there is no continuous rainstorm in June, it will be beneficial to the outbreak of insect population.

Control methods of Spodoptera litura

Trapping and killing adults: using the phototaxis and chemotaxis of adults, trapping and killing adults with black light and poplar branches or sweet and sour. Artificial killing: according to the characteristics that adults tend to lay eggs on the back of the middle leaves of plants and larvae feed in groups, the egg pieces should be removed in time before the spawning peak and the larvae spread, and the adults should be killed. Chemical control: 10% SC 1500 times, 5% regent SC 2500 times, 5.7% cypermethrin EC 4000 times, 4.5% cis-cypermethrin EC 3000 times, 52.25% nongdile EC 1500 times, 90 times.

Fourth, orange-gray image

Brief introduction of citrus gray image

Citrus gray weevil belongs to COLEOPTERA weevil family. Harm jasmine from March to May every year. Adults bite buds, buds and leaves and eat old leaves. Young and old leaves were eaten in the shape of carving, and they were all eaten seriously, which greatly affected the first batch of flowers in late April and early May. According to a preliminary investigation, there are more than 20,000 insects per mu in the sandy loam jasmine field along the river in Hengxian County. Citrus gray image is known to be harmful: citrus, tea, jasmine, peach, longan, litchi and so on. Life habit of citrus gray weevil: the insect occurs once a year, and a few of them complete one generation in two years. Overwintering in soil as adults and larvae. Overwintering adults are unearthed from mid-March to early April every year. Spawning began in mid-April. Larvae hatch from late April to mid-July, pupate at the end of September to the end of 10, and emerge at the end of 10. Overwintering as an adult in the pupa room that year. The larvae hatched after the end of July overwinter at the age of 3~4 in that year and continue to move in the spring of the following year. After pupation and eclosion, it overwinters as an adult and is unearthed in the third year. After the adults are unearthed, they climb to the top of the tree along the trunk and bite the bud leaves, and the bud leaves eat the old leaves. Adults are slow to act and pretend to be dead. They like to hide in hidden places such as rolled leaves and branches. Strong hunger tolerance, up to 6-27 days. An egg is laid between two overlapping leaves. Adults live longer, with the average active period of 183 days for males and 130 days for females. After hatching, the larvae fall to the ground with a depth of 10~50 cm. Larvae feed on young roots and humus of plants. When the larvae mature, they pupate in the soil chamber.

Control method of citrus gray image

Artificial killing: This insect has no hind wings, can't fly, moves slowly, and has strong feign death ability. It can be killed after artificial capture. Chemical control: spraying should be carried out at the peak of adults. The following chemicals can be selected: 30% insecticide 1000 times, 4.5% beta-cypermethrin 1000~2000 times, or 2.5% effort 1000~2000 times, and some dichlorvos spray can be added appropriately. Highly toxic pesticide methamidophos, 1605, etc. They are not suitable for use because of their high toxicity and long residual period.

V. Aleurotubucustakahashi I Videt Subramaniam

Brief introduction of whitefly tall Joe horse

In the past, it was reported that whiteflies in Gao Xue mainly harmed citrus. Now jasmine pests in Guangxi are very serious; It has been widespread in jasmine in Hengxian county, and the population density of some plots is high, and it has shown obvious symptoms of victimization. 14 leaves with more insects were selected in a flower field in Cao Village, Fucheng Town, Hengxian County. The results showed that there were 65.3 live nymphs and 58.6 empty pupae per leaf, that is, 123.9 live nymphs and empty pupae per leaf. The leaves with the largest number of insects are 152 live nymphs and 137 pupal shells, totaling 289. Such a high amount of insect food harms leaves, which obviously fades and turns yellow, seriously affecting plant growth. Because the Gaucher's tumor of whitefly is harmed by sucking mouthparts, it will not cause leaf morphological defects, and the worm is tiny and clustered on th.

In Jasmine, nymph and adult are attracted by backstab juice, which leads to leaves in groups and whiteflies with high tumors, which leads to green leaves, poor plant growth and even withered branches and leaves in severe cases. At the same time, it secretes honey dew, which is easy to induce soot disease. Adults like to gather on the back of tender leaves at the top of plants to feed and lay eggs, and often stay for a short distance when they are scared or worried. Adults have certain phototaxis, like humidity and move at high temperature. Sexual reproduction or parthenogenesis. Eggs are scattered on the back of leaves. The newly hatched nymph can crawl around the leaf back and be fixed after the second instar. Dozens or even hundreds of nymphs often gather on a leaf. The peak period of this insect is April-June and 9-65438+1October.

Control methods of whitefly

According to the characteristics of this insect and the control results of whitefly when we control other pests, two control suggestions are put forward for reference. Natural Enemy Protection: The predatory natural enemies of this insect include grass ridges, ladybugs, predatory mites, spiders and so on. Parasitic natural enemies are mainly aphid wasps. All kinds of natural enemies can control pests to a certain extent, so we should try to avoid using highly toxic chemical pesticides in jasmine fields. Pesticide control: imidacloprid, chlorpyrifos and other pesticides with high efficiency against homopteran pests are selected in the peak period of nymphs. Insect mite lamp and flower maggot net used by flower farmers to control Diptera have good lethality to whitefly adults and are safe to natural enemies.

Six, flower thrips

Brief introduction of flower thrips

Flower thrips belong to the family Thysanoptera thrips. This insect destroys the corolla and stamens in flowers, especially around the ovary, and destroys the reproductive organs. After the corolla is damaged, horizontal stripes or dotted stripes appear, which can lead to the deformation, wilting and dryness of the corolla, which has a great influence on the ornamental value. After leaves are damaged, silver-gray stripes often appear on young stems and new leaves, or the base of leaves is all silver-gray, which leads to deciduous leaves and affects growth. Life habit: one year 1 1~ 14 generations, with overlapping generations. Overwintering as adults. Adults have strong phototaxis. There are dozens to hundreds of adults and nymphs in a slightly fragrant big corolla flower. Eggs are more common in petals, filaments and young leaves, and the spawning place is slightly swollen or slightly raised, which can be checked by light. Each female lays 77~248 eggs, and the spawning period is 20~50 days.

Control methods of flower thrips

Adopt chemical control. Spraying 500-800 times of 2.5% Derris, 800- 1000 times of 3% pyrethrin, 50% fenvalerate 1000 times, 20% fenvalerate 1000 times and fenvalerate/kloc-0.

Seven, cotton red spider Tetxanychuscinnabarinus

Brief introduction of cotton red spider

Cotton spider is also called hawthorn spider mite and hawthorn spider mite. It belongs to Eupolyphaga, Tetranychidae and is an important pest mite. Cotton spiders are omnivorous, with strong reproductive ability and rapid diffusion, which can harm dozens of plants, including corn, melons, beans, vegetables, trees and weeds. Jasmine is one of the most common harmful plants. The insect bites and sucks the host juice on the back of jasmine leaves or buds with adult mites, juvenile mites and nymphs, which makes the damaged leaves appear green, obviously white, seriously yellow and even rust spots. When the bud is damaged, it will become smaller, shrink or close, which will greatly affect the yield and quality of flowers. Cotton spiders can drift with the tide, spread with the wind, or crawl and spread over short distances. Generally speaking, the climate is dry and high temperature is beneficial to its reproduction. The optimum temperature is 29~3 1 and the relative humidity is 35%~55%. If the air humidity exceeds 70%, its reproduction will be inhibited. There are many natural enemies of cotton spiders, such as lacewings, carnivorous mites, carnivorous thrips and ladybugs. All these have played a very good role in the prevention and control of cotton spiders.

Control methods of cotton red spider

1. Agricultural control of weeds in the field, combined with pruning, defoliation, burning or treatment, can eliminate the source of overwintering insects and reduce the harm. Strengthen the management of water and fertilizer to enhance the insect resistance of plants. Keep the humidity and worsen the living environment of cotton spiders. 2.24.5% chlorfenapyr or 1.8% chlorfenapyr 2000 times diluent, or 50% tricyclic tin wettable powder 1500 times d.

There are identical Babylonia brasiliensis and Babylonia grey in the farmland, and Babylonia grey is the main one. Snails have a very complicated diet. Besides jasmine, vegetables, beans, hemp, tobacco, tea, cotton, green manure, bananas, fruit trees and weeds are all harmful. On jasmine, young leaves, old leaves and even branches have been damaged from the bud tips that have just been pulled out to the growing branches. They often eat in groups, eat up the buds of branches or bite off the bark of branches, causing the whole branches to wither, or biting leaves into nicks, perforations and rags, which seriously affects the yield. Occurrence regularity: the same type of Babylonia occurs once a year, and adults and young shellfish overwinter in the loose soil under the roots of crops or the litter layer on the ground, or under rocks and clods. In winter, they often secrete a white film to seal the shell mouth. In March of the following year, the temperature turned warmer, and the overwintering adult and larval shellfish began to move, crawling on the crop straw and biting new buds in groups. Snails have two mating and spawning peaks every year, the first in April and the second in September. Adult shellfish begin to lay eggs a few days after mating, and they lay eggs in the topsoil beside plants or under dead leaves on the ground 1~2 cm deep. Eggs stick in piles, each pile has dozens to dozens of eggs, and each female insect can produce more than 200 eggs at most. Eggs need shade to survive. If exposed to the sun to dry, they will burst. After hatching for 4 months, the young shellfish ate less, and after 6 months, their food intake increased greatly. After about 8 months, they became mature and became adults. Snails like wet environment. They hide in the shade on sunny days and come out in the morning and evening and on cloudy days. There are two loss peaks in a year. From April to May, the overwintering young shellfish gradually matured, and the number of adult shellfish in the field increased. At this time, there is much rain and high humidity, which is very suitable for its growth and serious harm. The temperature rises from June to August, and drought and lack of rain are not conducive to its activities. Most of them lurk under the roots of crops or clods, secreting white films to seal the shells for summer consumption. September -65438+ 10, when the temperature drops, it will resume foraging activities and mate and lay eggs in the autumn rain. 1 1 month later, it gradually moved to the wintering area and entered the winter.

Eight, snails

Cleaning the garden regularly, cleaning and burning the fallen leaves on the ground of crops, especially the branches and leaves trimmed before winter, is one of the places where snails can spend the winter. They can't stay in the garden for the winter. April and May, September and 10 are snail spawning seasons. Combined with intertillage weeding, the topsoil at the root of crops is ploughed and exposed to the sun to kill eggs. At the peak of snail activity, snails will be caught artificially in the morning and evening or on cloudy days while being exposed in large quantities. Pesticide control: 30% fenoconazole, 0/00 ~ 500 g per mu/kloc, 2~3kg bait can be mixed with water to form small particles. It can be applied in strips or holes, and the control effect is very good. You can also use 300-000g molluscicide per mu, 350g molluscicide with 6% density and 65,438+0,000g molluscicide with 65,438+0,000g molluscicide per mu, mix dry fine soil or fine sand, and spread it evenly on snail-shifting crops and the ground at night, or dissolve it in warm water and spray it with a sprayer. Spray 1000 times diluted 70% balosha wettable powder. If it rains after application, it should be applied again. Or sprinkle lime powder, 3-5 kg per mu. There are really many common diseases and insect pests in jasmine. Let's briefly introduce it below! Finally, it is not easy for Jasmine to live, and it is not easy to maintain Jasmine's flower friends! Let's fight pests to the end and protect the fragrant jasmine!